Monthly Archives: December 2020

Waterproof Pressure Switch PC-500

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Waterproof pressure switch is also called waterproof pressure switch. It can be weatherproof for external use.

Waterproof Pressure Switch PC-500

Waterproof micro pressure switch can meet the pressure control in harsh environment and the place with limited installation space. It is used for pressure alarm, parking or control system, etc. Stainless steel pressure diaphragm, waterproof and moisture-proof.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Request a Quote
More Pressure Switches

Features of Waterproof Pressure Switch PC-500

  • All stainless steel structure, increased pressure range, anti-corrosion and moisture-proof.
  • The working pressure can be manufactured according to user requirements (-14.5~3600PSI).
  • Using laser welding process equipment, superior sealing performance.
  • The contacts are all silver-plated, and the special products are silver contacts (industrial grade). Work is stable and reliable.
  • The electrical contacts of the switch have a long working life (more than 100,000 times) and excellent shock resistance.
  • It is made of internationally advanced stainless steel pressure sensor (stainless steel bellows, stainless steel diaphragm).
  • It has excellent qualities such as small size, convenient installation, accurate pressure control, and stable performance.
  • 316SS shell protection.
  • Factory set or adjustable set point on site.

Specifications of Waterproof Pressure Switch PC-500

Output signal:Switch signal
Working pressure (high position) range:-14.5～3600PSI
Reset pressure (low position) range:-11～3400PSI
Working pressure deviation:± 3～30PSI
Ambient temperature:-40～85℃，
Medium temperature:-40～125℃
Electrical load:220VAC ,56/60Hz，3A
Working life:≥100,000 Cycles

PC500 series waterproof stainless steel pressure switch model list

Model Thread size and length
(mm) 		Dimensions
(mm) 		Electrical connections Switch Type
Normally closed (A)/normally open B
/C (normally open + normally closed) 		Adjustment range
(PSI) 		Action pressure
(PSI)
PC 501 M12x1.5/13 Φ26.5×60 Hessman connector Single Pole Single Throw A -3614.5 -11～3400
PC 502 M12x1.5-6g Φ26.5×70 Single Pole Double Throw C -3614.5 -11～3400
PC 503 G1/4 /13 Φ26.5×60 Single pole single throw A/B -3614.5 -11～3400
PC 504 G1/4 /19 Φ26.5×70 Single Pole Double Throw C -3614.5 -11～3400
PC 505 M14x1.5 /11 Φ26.5×58 Single pole single throw A/B -3614.5 -11～3400
PC 506 M14x1.5 /11 Φ26.5×68 Single Pole Double Throw C -3614.5 -11～3400
PC 507 G1/2 /15 Φ26.5×62 Single pole single throw A/B -3614.5 -11～3400
PC 508 G1/2 /15 Φ26.5×72 Single Pole Double Throw C -3614.5 -11～3400

What does a pressure switch do on a water pump?

The pressure switch installed in the inlet pipe is designed to prevent the pump from cavitation and evacuation. When the inlet pressure is lower than the set value, it will give a control signal and automatically take measures or give an alarm.

How to tell if well pump pressure switch is bad?

Check whether the pressure switch has the above functions → the pressure in the water pipe decreases to the set value → the switch turns on the pump; the pressure in the water pipe increases to the set value → the switch disconnects and stops the pump (the water pipe must be equipped with a check valve).

The so-called setting value is the required upper and lower pressure value.

If the switch cannot achieve the above functions, 1. Wiring error; 2. Switch failure.

In the use of pressure switches, differential pressure switches, flow switches or temperature switches, there will be a ‘Deadband’ term.

The so-called Deadband is the difference between the values ​​corresponding to the switch-off and switch-on values.

Taking the pressure switch as an example, the Deadband is 0.1MPa. The switch setting value is 1MPa, and the switch is closed when it rises. When the pressure is 0, the switch is off. When the pressure rises to 1MPa. The switch will close.

After closing, when will the switch open again?

Normally, when the switch is closed, the pressure will decrease. When the pressure drops to 1MPa-switch dead zone=1-0.1MPa=0.9MPa. The switch will open again.

If the switch action point is set at 0.7MPa, it will be 0.6MPa when the switch returns to action.

The so-called fixed Deadband means no matter how much pressure you set the action point of the pressure switch to. The value it returns will be smaller (or higher) than the set pressure value by a dead zone value.

The so-called adjustable Deadband is that you can set the size of the value when the switch returns. For example, the adjustable dead zone is 0.05-0.1MPa, and the set value is 1MPa. Then I can make the switch return to action at any value between 0.9MPa-0.95MPa.

Differential pressure switches are also called differential pressure controllers. It is to use the pressure difference between the two pressure guiding pipes to issue an electrical signal (switch contact signal). When the pressure difference between the two ends of the series pressure guiding liquid pipe increases (or decreases) and exceeds the set value of the differential pressure controller, the micro switch inside the differential pressure switch sends a signal to control the reversing valve reversing or monitor the lubrication system. The valve then opens up (or closes down). Therefore, the pressure difference between the two ends of the system liquid pipe is reduced. achieve the normal operation of the system.

Explosion Proof Pressure Switches are designed for pressure control within harsh applications. The wiring contacts are sealed in a solid space through a solid sealed shell to achieve explosion-proof effect.

The explosion-proof construction provides superior protection, while its compact design allows for easy integration into custom equipment or systems. This model is ideal for pressure alarm, shutdown or control within hazardous areas when limited size and process compatibility are needed.

Encapsulated and sealed fast micro switch, which can be divided into single pole double throw or double pole double throw output. In general dangerous occasions and corrosive environments, it is most practical to choose this series of switches. With an internal scale adjustment mechanism, it is convenient for customers to calibrate the set point on site. It has a compact structure and can be widely used in water supply and sewage treatment, papermaking, food and petrochemical, pharmaceutical and other industries.

Extended reading: Miniature Pressure Switch

More Featured Pressure Switches

Frequently
Asked
Questions

Help Center

Low-voltage switches are roughly classified into three categories: automotive low-voltage protection switches, pressure-controlled low-voltage switches, and low-voltage switches for power equipment. It is suitable for the automobile industry, water purifier industry, electric power industry and other fields.

In different fields, low-voltage switches have different meanings. Generally, there are low-voltage protection switches for automobiles, low-voltage switches for pressure control, and low-voltage switches for power equipment.

The low-voltage switch refers to when the voltage provided by the car to the on-board power supply is lower than how much the on-board power supply will automatically turn off. It is a commonly used electrical component. This function of the on-board power supply is a protection function, which protects the power supply equipment of the car from damage, and gives priority to ensuring the normal power consumption of the car itself, such as ensuring that the car can be ignited normally.

The pressure control low pressure switch is an electrical component that controls the entire circuit of the system to disconnect when the pressure of the water supply in the entire system is too low or there is no water to protect the service life of the pump and prevent the system pump from idling.

The pressure switch is when the pressure in the system is higher or lower than the rated safety pressure. The disc in the sensor moves instantaneously. Push the switch connector on or off by connecting the guide rod.

When the pressure drops or rises to the rated recovery value, the disc resets instantly and the switch resets automatically. Or simply put, when the measured pressure exceeds the rated value. The free end of the elastic element is displaced. Push the switching element directly or after a comparison. Change the on-off state of the switch element to achieve the purpose of controlling the measured pressure.

The working principle of the water pump pressure controller: the working medium (oil, gas, water) directly acts on the metal diaphragm. The pressure of the working medium is reflected by the deformation of the metal diaphragm, and a detection signal or a control signal is output at the same time.

The water pressure switch is automatically closed when the water pressure is too high or too low, which is the function of the protection device.

Sino-Inst offers over 10 Waterproof Pressure Switches for pressure measurement.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Waterproof Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Pressure Switch instrumentation, located in China.

You may like:

Adjustable Pressure Switch PC-400

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Adjustable Pressure Switch is a mechanical diaphragm pressure switch. Use stainless steel pressure diaphragm.

Adjustable Pressure Switch is mainly suitable for neutral gases such as air, gas, water vapor and liquid media such as water, refrigerant, oil, etc., and can be used in vacuum. Can be used for air compressors, water pumps, etc.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Request a Quote
More Pressure Switches

Specifications of Adjustable Pressure Switch PC-400

Pressure regulation range:-1～145PSI
Action pressure:-0.5～80PSI
Working pressure deviation:± 3～30PSI
Ambient temperature:-40～85℃，
Medium temperature:-40～125℃
Load power supply:220VAC ,56/60Hz，6A
Working life:≥100,000 Cycles

If users have special requirements, they can be customized according to the provided samples, drawings, technical parameters, etc.

PC400 series adjustable stainless steel pressure switch model table

ModelThread size and length
(mm)		Dimensions
(mm)		Electrical connectionsSwitch Type
Normally closed (A)/normally open B
/C (normally open + normally closed)		Adjustment range
(PSI)		Action pressure
(PSI)
PC 401M12 x1.5/10Φ24×46TerminalsSingle pole single throw A/B-1～145-0.5～80
PC 402M12 x1.5/10Φ24×55Direct outSingle pole single throw A/B-1～145-0.5～80
PC 403M12 x1.5/10Φ24×46TerminalsSingle Pole Double Throw C-1～145-0.5～80
PC 404M12 x1.5/10Φ24×55Direct outSingle Pole Double Throw C-1～145-0.5～80
PC 405G1/4-19/13Φ24×49Direct outSingle pole single throw A/B-1～145-0.5～80
PC 406G1/4-19/13Φ24×58Direct outSingle pole single throw A/B-1～30-0.5～15
PC 407G1/4-19/13Φ24×49TerminalsSingle Pole Double Throw C-1～145-0.5～80
PC 408G1/4-19/13Φ24×58Direct outSingle Pole Double Throw C-1～145-0.5～80
PC 4091/4-18NPT/13Φ24×49TerminalsSingle pole single throw A/B-1～145-0.5～80
PC 4101/4-18NPT/13Φ24×58Direct outSingle pole single throw A/B-1～145-0.5～80
PC 4111/4-18NPT/13Φ24×49TerminalsSingle Pole Double Throw C-1～145-0.5～80
PC 4121/4-18NPT/13Φ24×58Direct outSingle Pole Double Throw C-1～145-0.5～80
PC 413G1/2-14/15Φ24×51TerminalsSingle pole single throw A/B-1～145-0.5～80
PC 414G1/2-14/15Φ24×60Direct outSingle pole single throw A/B-1～145-0.5～80
PC 415G1/2-14/15Φ24×51TerminalsSingle Pole Double Throw C-1～145-0.5～80
PC 416G1/2-14/15Φ24×60Direct outSingle Pole Double Throw C-1～145-0.5～80

Adjustable pressure switch for air compressor

The air compressor pressure switch can adjust the start and stop of the air compressor. Through the pressure adjustment in the air tank, let the air compressor rest and maintain it.

When the air compressor factory is debugging, it can be adjusted to a certain pressure according to the needs of different customers, and then set a good difference.

For example, when the compressor starts, pump air into it, and when the pressure reaches 20 kg, the air compressor is unloaded or stopped.

When the pressure is 14 kg, the air compressor starts again, but it will have a pressure difference, so you can let it rest at this time.

Extended reading: Miniature Pressure Switch

How to adjust the air compressor pressure switch?

Pressure level adjustment. Use pressure to adjust the screw clockwise to increase its pressure. On the contrary, the acting pressure is low, indicating that its pressure difference remains unchanged.

Use pressure to adjust the screw in 1 clockwise, so that it will rise under its action. On the contrary, the acting pressure decreases, indicating that its pressure will not change.

When the air compressor is set to pressure or running, it means that the vent valve is saturated, and the valve will discharge the gas in the steel pipe. Of course, this is a normal phenomenon and you don’t need to worry.

When adjusting the pressure, do not exceed the pressure range of the compressor, but proper exhaust is necessary.

Besides pressure sensors, we also supply torque sensors. What Is a Torque Transducer? How to Choose?

Adjustable pressure switch for water pump

The working principle of the water pump pressure controller:
The working medium (oil, gas, and water) directly acts on the metal diaphragm. The deformation of the metal diaphragm reflects the pressure of the working medium. Simultaneously output detection signals or control signals.

Extension of knowledge points:
The water pump pressure controller is generally a metal 316L diaphragm sensor, which can be used for neutral oil, gaseous media and water.
The setting value of the controller is adjustable, and the range of adjustment range -0.1~40MPa is optional.

Adjustment method of water pump pressure controller:

  1. Adjust the pressure limit to 1.5MPa (upper switching value) and send out a contact signal. The operation steps:
    • Open the cover and loosen the locker.　　
    • Turn the setting value adjustment screw clockwise to make the setting value change from large to small until the switch contacts switch at 1.5MPa.　　
    • Tighten the locker.　
      　
  2. Adjust the lower limit of pressure to 0.5MPa (lower switching value) to send out a contact signal, the operation steps:
    • Open the cover and loosen the locker.　　
    • Rotate the setting value adjustment screw counterclockwise to make the setting value change from small to large until the switch contacts switch at 0.5MPa.　　
    • Tighten the locker.

More Featured Pressure Switches

Miniature Pressure Switch PC-100
Manual Reset Pressure Switch PC-200
Stainless Steel Pressure Switch PC-300

You may like:

Sino-Inst offers over 50 Adjustable Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

A wide variety of Adjustable Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Adjustable Pressure Switch instrumentation, located in China.

Stainless Steel Pressure Switch PC-300

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Stainless steel pressure switch stainless steel material, compact structure. Can be widely used in water, oil, gas pressure measurement.

Stainless steel pressure switch uses internationally advanced stainless steel pressure diaphragm. All stainless steel color, compact appearance, easy installation and use, high and low pressure integrated design. It can control the pressure of the high pressure end and low pressure end of the system at the same time. The product is waterproof and moisture-proof.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Request a Quote
More Pressure Switches

Specifications of Stainless Steel Pressure Switch

Output signal:Switch signal
Working pressure (high position) range:-14.5～2200PSI
Reset pressure (low position) range:-12～2180PSI
Working pressure deviation:± 3～30PSI
Ambient temperature:-40～85℃
Medium temperature:-40～125℃
Electrical load:220VAC ,56/60Hz，3A
Working life:≥100,000 Cycles

Pressure Switch Types

According to different classification standards, we can classify pressure switches as follows.

  • According to the sensing element can be divided into:
    • Coil spring tube pressure switch, diaphragm pressure switch, bellows pressure switch, bellows pressure switch, etc.
  • According to the nature, it can be divided into:
    • Mechanical and electronic smart pressure switches.
  • According to the set value, it can be divided into:
    • Adjustable pressure switch and non-adjustable pressure switch.
  • According to the application, it can be divided into:
    • General pressure switches, small pressure switches, smart pressure switches, explosion-proof pressure switches, marine pressure switches, differential pressure switches, etc.

Guess You’ll Like: Explosion Proof Pressure Transmitter

Common types of pressure switches

Miniature Pressure Switch

Miniature pressure switch PC-100 has a long working life (more than 100,000 times) and excellent shock resistance. It can be used to monitor liquid or gas pressure.

Manual Reset Pressure Switch

Manual Reset Pressure Switch uses international advanced stainless steel pressure diaphragm with high accuracy. Small size, easy installation and use, high and low pressure integrated design. It can simultaneously control the pressure of the high pressure end and the low pressure end of the system. Manual reset, suitable for semi-automatic operation occasions.

Stainless steel differential pressure switch

The differential pressure switch is made of stainless steel, which can be dirt-resistant, corrosion-resistant, clean and hygienic.

Differential pressure controller, also called differential pressure switch, differential pressure switch, differential pressure controller. It can also be used for cut-off protection of water pumps and filters. It can also be called: differential pressure type water flow switch, differential pressure type flow switch.

The adjustable differential pressure switch can provide a very wide range of adjustable differential pressure settings. It adopts stable micro switch and sensitive diaphragm to achieve the excellent advantages of high precision and low dead zone.

The adjustable differential pressure switch controller is developed for applications that are used in small quantities and have different requirements for differential pressure. It is usually used in engineering to detect the pressure difference of water filters, pumps, heat exchangers, chillers and coils.

When the water flow (pressure difference) in the system rises or falls to the set value. Output an alarm or cut-off function alarm to provide to the automatic control system. It can also be used to indicate the status of a pump or filter.

The differential pressure switch is composed of two diaphragm cavities. And the two into diaphragm and bellows type, And their performance characteristics are also differentsitive diaphragm. High pressure and low pressure enter the high pressure cavity and low pressure cavity of the differential pressure switch respectively. And the differential pressure felt deforms the pressure sensitive diaphragm. Through mechanical structures such as railing springs. Finally, the uppermost micro switch is activated to output the electrical signal.

Different pressure-sensitive components of differential pressure switches are divided into diaphragm and bellows type. And their performance characteristics are also different.

Differential pressure switches are composed of pressure-sensitive components, have different principles, and have different performances. The diaphragm type can be made into high static pressure and low differential pressure, while the bellows itself has low pressure resistance.

Stainless steel digital pressure switch

Stainless steel digital pressure switch, an economical digital pressure switch integrating pressure measurement, display and control. This series of pressure switches can be set with two normally open and normally closed alarm points, and can also achieve two high and low pressure controls. In addition, it has a key to zero, three display units switching and other functions.

The operation method of this pressure switch is simple and intuitive, just set the action point and hysteresis according to the manual, and the hysteresis of the two sets of relays can be set independently. According to the customer site, only one group of control can be used, or both groups can be used.

Stainless steel digital pressure switch

Stainless steel digital pressure switch, an economical digital pressure switch integrating pressure measurement, display and control. This series of pressure switches can be set with two normally open and normally closed alarm points, and can also achieve two high and low pressure controls. In addition, it has a key to zero, three display units switching and other functions.

The operation method of this pressure switch is simple and intuitive, just set the action point and hysteresis according to the manual, and the hysteresis of the two sets of relays can be set independently. According to the customer site, only one group of control can be used, or both groups can be used.

All products adopt food-grade 304 stainless steel joints and 304 stainless steel housings, providing different installation methods in axial and radial directions.

Weatherproof pressure switch

The degree of protection of the fully welded stainless steel shell is designed to reach IP67

General considerations for IP65 and IP67 protection levels:

In order to clarify the “secrets” of these two types of protection, this article will give a technical description: refer to IEC 60529. The first characteristic number specifies “prevention of solid foreign objects”. The second characteristic number specifies “prevention of water entry”.

Weatherproof pressure switch

The degree of protection of the fully welded stainless steel shell is designed to reach IP67

General considerations for IP65 and IP67 protection levels:

In order to clarify the “secrets” of these two types of protection, this article will give a technical description: refer to IEC 60529. The first characteristic number specifies “prevention of solid foreign objects”. The second characteristic number specifies “prevention of water entry”.

Different protection levels can provide different types of protection:
“Dustproof” equipment (IP6x) to prevent “water jet” (IPx5) and “short immersion” (IPx7).
Not all immersion-proof instruments can withstand water jets, and vice versa, and not every instrument that is water-proof jets can be immersed.
In some applications this is a small but extremely important difference.

Stainless steel well pressure switch

A well water pressure switch helps to control a well pump system which helps provide water to a household or business. The pressure switch has a spring on the inside that’s connected to electrical contacts. As time goes on, the spring becomes weak and the electrical contacts wear out which can make it seem that your pump isn’t working quite right.
It is used with submersible well pumps and jet pumps.

Pressure switch for water

The water pressure switch, as the name implies, uses water pressure to control the switch.

When the water pressure switch is in use, a fixed value is generally set. That is to say, when the actual value is less than this fixed value or greater than this fixed value, it will give an alarm. And it moves to cause it to be connected to another connecting rod to switch Power on or off.

When the water pressure in the system reaches a fixed value, it returns to its original state, which acts as a switch.

Extended reading: Miniature Pressure Switch

Air pressure switch

The air pressure switch can be used to control the positive pressure, negative pressure and differential pressure of air, flue gas and other non-flammable gases. Especially in the case of differential pressure control, a small pressure difference can be monitored to achieve precise differential pressure control.

Air pressure switches mainly include two types of normally closed and normally open. The main feature is the use of inch pipe threaded quick coupling or copper pipe welding type installation structure. The installation procedure is flexible, convenient to use, and no special fixed installation is required.

The main application areas are the high and low pressure protection control of household, commercial and automobile refrigeration systems, steam conditions and power stations and other heavy industry areas.

Read more about: Gas Pressure Transducer-Sensor for Gas Pressure Meaurement

You may like:

Sino-Inst offers over 50 Stainless Steel Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

A wide variety of Stainless Steel Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Stainless Steel Pressure Switch instrumentation, located in China.

Manual Reset Pressure Switch PC-200

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Manual Reset Pressure Switch is suitable for semi-automatic operation. Control high pressure end and the low pressure end of the system at the same time.

Manual Reset Pressure Switch uses international advanced stainless steel pressure diaphragm with high accuracy. Small size, easy installation and use, high and low pressure integrated design. It can simultaneously control the pressure of the high pressure end and the low pressure end of the system. Manual reset, suitable for semi-automatic operation occasions.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Request a Quote
More Pressure Switches

Features of Manual Reset Pressure Switch

  1. Manually push the reset switch to meet special working conditions
  2. Working pressure can be manufactured according to user requirements (30-800PSI)
  3. Using laser welding process equipment, excellent sealing performance
  4. The contacts are all silver-plated, and the special products are silver contacts (industrial grade), which are stable and reliable.
  5. Long working life of switch electrical contacts (more than 100,000 times), excellent shock resistance

Specifications of Manual Reset Pressure Switch

Output signal: switch signal
Working pressure (high position) range: 30～800PSI
Reset pressure (low position) Range: 10～700PSI
Working pressure deviation: ±3～30PSI
Ambient temperature: -40～85℃
Medium temperature: -40～125℃
Electrical load: 220VAC, 56/60Hz, 3A
Working life: ≥100,000 Cycles

PC200 series manual reset pressure switch model list:

ModelThread size/length
(mm)		Dimensions
(mm)		Electrical connectionsSwitch Type
Normally closed (A)/normally open B
/C (normally open + normally closed)		Action pressure
(PSI)		Reset pressure
(PSI)
PC 201Inner 7/16-20UNFΦ23×53Direct outSingle Pole Single Throw A30～80010～700
PC 202Inner 7/16-20UNFΦ23×53Direct outSingle Pole Double Throw C30～80010～700
PC 2031/4NPT /13Φ23×59Direct outSingle Pole Single Throw A30～80010～700
PC 2041/4NPT /13Φ23×59Direct outSingle Pole Double Throw C30～80010～700
PC 205Φ6 trachea/72Φ28×108TerminalSingle Pole Single Throw A30～80010～700
PC 206Φ14 trachea x21Φ23×60Direct outSingle Pole Double Throw C30～80010～700
PC 207Inner 7/16-20UNFΦ24×53Direct outSingle Pole Single Throw A30～80010～700
PC 208Inner 7/16-20UNFΦ24×53Direct outSingle Pole Single Throw A30～80010～700

Manual Reset High Pressure Switch

The controller adopts a piston type sensor, which is divided into three types: with a drain port, a non-leak piston and a combination of a piston type and a diaphragm type.

It can be used for compressed air containing oil mist and other gas containing oil mist that has no corrosive effect on the pressure sensor material, hydraulic oil, water-oil emulsion and neutral liquid medium with good lubricating performance.

The setting value of the controller is adjustable, and its adjustment range is 0.3-40MPa.

Extended reading: Miniature Pressure Switch

How does a pressure switch work?

The force switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.  

The working principle of the pressure switch is: when the measured pressure exceeds the rated value, the free end of the elastic element is displaced, and the switch element is pushed directly or after comparison to change the on-off state of the switch element to achieve the purpose of controlling the measured pressure.  

The elastic elements used in the pressure switch include a single-turn spring tube, diaphragm, bellows and bellows.    

Switching elements include magnetic switches, mercury switches, micro switches, etc.    

There are two types of pressure switches: normally open and normally closed.

Extended Reading: Electronic Pressure Switch for Air Compressor

How do you test a pressure switch?

Calibration method of pressure switch:

  1. Find out the action setting value of the tested instrument according to the specification.
  2. Select an appropriate pressure signal source to pressurize the test meter. A standard pressure gauge with an appropriate range detects the signal pressure. Use a multimeter to measure the on and off states of the contacts.
  3. For the high report switch, slowly increase the pressure from low to high, and observe the multimeter. When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is the high reported value.
    Then slowly lower the pressure. When the multimeter indicates a sudden change again, the evaluation of the standard pressure gauge is the reset value.
  4. For the under-report switch, the test pressure should be increased above the set value first, and then slowly decreased.
    When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is a low value.
    Press again slowly, and when the multimeter indicates a sudden change again, the indication value of the standard pressure gauge is the reset value.

Miniature Pressure Switch PC-100

Miniature pressure switch is also called compact pressure switch, or micro pressure controller. Designed specifically for OEM applications. A variety of threads are available.

You may like:

Sino-Inst offers over 50 Manual Reset Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

A wide variety of Manual Reset Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Manual Reset Pressure Switch instrumentation, located in China.

Miniature Pressure Switch PC-100

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The miniature pressure switch is also called compact pressure switch, or micro pressure controller. Designed specifically for OEM applications. A variety of threads are available.

Miniature pressure switch PC-100 has a long working life (more than 100,000 times) and excellent shock resistance. It can be used to monitor liquid or gas pressure.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Request a Quote
More Pressure Switches

Features of Miniature Pressure Switch PC-100

  • Use internationally advanced stainless steel pressure diaphragm (stainless steel bellows). Laser welding process equipment. Exquisite workmanship and high precision.
  • Small size, easy installation and use, high and low pressure integrated design. It can simultaneously control the pressure of the high pressure end and low pressure end of the system.
  • The electrical contacts of the switch have a long working life (more than 100,000 times). Excellent shock resistance.
  • Small and exquisite appearance, easy to install and use.
  • The working pressure can be manufactured according to user requirements (-14.5-800PSI).
  • Using laser welding process equipment, excellent sealing performance.
  • The contacts are all silver-plated, and the special products are silver contacts (industrial grade), which are stable and reliable.

Specifications of Miniature Pressure Switch

Output signal: switch signal
Working pressure (high position) range: -14.5～800PSI
Reset pressure (low position) range: -12～780PSI
Working pressure deviation: ± 3～30PSI
Ambient temperature: -40～85℃
Medium temperature: -40～125℃
Load power supply: 220VAC, 56/60Hz, 6A
Working life: ≥100,000 Cycles

Read more about: Gas Pressure Transducer-Sensor for Gas Pressure Meaurement

If users have special requirements, they can be customized according to the provided samples, drawings, technical parameters, etc.

PC100 series miniature pressure switch model table according to our company’s respective parameter standards when ordering.

ModelThread size/length
(mm)		Dimensions
(mm)		Electrical connectionsSwitch type
Normally closed (A)/normally open B
/C (normally open + normally closed)		Action pressure
(PSI)		Reset pressure
(PSI)
PC 101Inner 7/16-20UNFΦ22×39TerminalSingle pole single throw A/B-14.5～800-12～780
PC 102Inner 7/16-20UNFΦ22×45Direct outSingle pole single throw A/B-14.5～800-12～780
PC 103Φ6 trachea/72Φ22×94TerminalSingle pole single throw A/B-14.5～800-12～780
PC 104Φ6 trachea/72Φ22×100Direct outSingle pole single throw A/B-14.5～800-12～780
PC 105Φ6 trachea/72Φ22×94TerminalSingle pole single throw A/B-14.5～800-12～780
PC 106Φ12 trachea/21Φ22×43TerminalSingle pole single throw A/B-14.5～80-12～75
PC 107G1/4-19BSP/13Φ22×45TerminalSingle pole single throw A/B-14.5～800-12～780
PC 108G1/4-19BSP/13Φ22×51Direct outSingle pole single throw A/B-14.5～800-12～780
PC 1091/4-18NPT/13Φ22×45TerminalSingle pole single throw A/B-14.5～800-12～780
PC 1101/4-18NPT/13Φ22×51Direct outSingle pole single throw A/B-14.5～800-12～780
PC 111G1/8-28BSP/10Φ22×51TerminalSingle pole single throw A/B-14.5～800-12～780
PC 112G1/8-28BSP/10Φ22×51Direct outSingle pole single throw A/B-14.5～800-12～780
PC 1131/8-27NPT/10Φ22×45TerminalSingle pole single throw A/B-14.5～800-12～780
PC 1141/8-27NPT/10Φ22×51Direct outSingle pole single throw A/B-14.5～800-12～780
PC 1153/8-24UNF/7Φ22×34TerminalSingle pole single throw A/B-14.5～300-12～180
PC 1163/8-24UNF/7Φ22×48Direct outSingle pole single throw A/B-14.5～300-12～180
PC 117M10x1/11Φ22×46TerminalSingle pole single throw A/B-14.5～300-12～180
PC 118M10x1.5/11Φ22×46TerminalSingle pole single throw A/B-14.5～800-12～780
PC 119M8x1/8Φ22×42TerminalSingle pole single throw A/B-14.5～300-12～180
PC 120G1/4 /13Φ24×46TerminalSingle Pole Double Throw C-14.5～800-12～780
PC 1211/4-18NPT/13Φ22×46TerminalSingle Pole Double Throw C-14.5～800-12～780
PC 122M12x1.25 cone/13Φ22×45TerminalSingle pole single throw A/B-14.5～800-12～780
PC 123G1/4/13Φ24×61Direct outSingle Pole Double Throw C-14.5～800-12～780
PC 124G1/2/14Φ24×55TerminalSingle Pole Double Throw C-14.5～800-12～780
PC 125G1/2/14Φ24×51TerminalSingle Pole Double Throw C-14.5～800-12～780
PC 126Φ8 or Φ6 gas pipe jointΦ24×68TerminalSingle Pole Double Throw C-14.5～80-12～75
PC 127G1/2/12Φ24×55Direct outSingle pole single throw A/B-14.5～800-12～780
PC 1281/8-27NPTΦ23×45TerminalSingle Pole Double Throw C-14.5～800-12～780
PC 129Inner M11x1/6.5Φ24×55Direct outSingle pole single throw A/B-14.5～300-12～180
PC 130G1/8-28/10Φ22.5×51Direct outSingle pole single throw A/B-14.5～800-12～780
PC 1311/8-27NPT/10.5Φ28.5×64ConnectorSingle Pole Double Throw C-14.5～300-12～180
PC 132Inner M14x1/8Φ25×61Direct outSingle Pole Double Throw C-1000～200-500～150
PC 133M12x1.25 cone/13Φ24×51Direct outSingle pole single throw A/B-14.5～800-12～780
PC 134M12x1.25 cone/13Φ24×61Direct outSingle Pole Double Throw C-14.5～800-12～780

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Miniature Pressure Switch Applications

Mainly used for high and low-pressure protection control of the household, commercial, and automobile refrigeration systems. Steam conditions and power stations. Accumulators, receivers, flash tanks, separators, scrubbers, oil refining devices. It is also suitable for high and low-pressure protection control of various equipment and tools.  

The miniature pressure switch is mainly used on the air compressor to adjust the start and stop status of the air compressor. By adjusting the pressure in the air tank, the air compressor can be stopped and rested, which has a maintenance effect on the machine.
When the air compressor is debugged in the factory, adjust to the specified pressure according to the customer’s needs. Then set a pressure difference.

For example, the compressor starts to start and pumps air into the air storage tank. When the pressure reaches 10kg, the air compressor stops or unloads. When the pressure reaches 7kg, the air compressor starts to start again. There is a pressure difference, and this process can make The compressor takes a break. It protects the air compressor. The compressor is directly driven by the electric motor, which causes the crankshaft to rotate, and drives the connecting rod to cause the piston to reciprocate, causing the cylinder volume to change.

Due to the change of the pressure in the cylinder, the air enters the cylinder through the air filter (muffler) through the intake valve. In the compression stroke, due to the reduction of the cylinder volume, the compressed air passes through the exhaust valve. The mass flow meter is exhausted The pipe and the one-way valve (check valve) enter the gas storage tank, and when the exhaust pressure reaches the rated pressure of 0.7MPa, it is controlled by the miniature pressure switch and automatically stops.

When the pressure of the gas storage tank drops to 0.5-0.6 MPa, the pressure switch is automatically connected and activated.

You may like Industrail pressure sensors.

Miniature Adjustable Pressure Switch

PC400 adjustable stainless steel pressure switch.

This series of pressure switches are used to monitor the pressure of automatic control, lifting systems, refrigeration, grease and lubrication devices, and hydraulic, pneumatic, and water circuits.

Its design uses a hexagonal body, nitrile rubber (NBR), oil-resistant diaphragm, and normally open, normally closed and SPDT single pole double throws gold contacts.

When the pressure needs to be adjusted. After removing the protective cap fastening screw. Use a small screwdriver to rotate the V adjustment screw embedded in the color switch cover. The pressure switches operating point can be set to the required value. Be careful not to affect the spring action.

The micro pressure sensor with a nominal size of 3mm in outer diameter is specially designed for the measurement of dynamic pressure distribution in aerodynamic research and test, which requires small installation size, does not disturb the flow field, and has excellent dynamic response.

It is used in the measurement of aerodynamic performance such as engine intake port pressure distortion, surge, etc. The natural frequency of the sensitive element is >200kHz.

The pressure sensitive element of the miniature pressure sensor adopts the most advanced MEMS (Miro Electronic Mechanical Systems) technology to design and manufacture.

The three-dimensional integrated, double-sided processed silicon piezoresistive pressure sensitive element has excellent linearity accuracy, and the high uniformity of the Wheatstone strain bridge fabricated by ion implantation and fine lithography makes it have a small temperature drift. The force-sensitive structure of silicon thin film formed by bulk micromachining and precise anisotropic etching enables it to have high pressure sensitivity and radial dimensions as small as 1.5mm.

The advanced miniaturized pressure-sensitive chip adopts stress-free packaging technology, hermetically packaged in a special micro-mounting base and stainless steel capillary.

The reference pressure chamber of the absolute pressure sensor is a vacuum chamber sealed on the back of the chip. The reference pressure chamber of the gauge pressure sensor is led out from the back through a thinner stainless steel capillary to communicate with the atmosphere. In order to facilitate the user to obtain a stable pressure reference, a thin nylon tube is used to lead it to the air pressure stable place.

Flat pressure sensor may actually refer to a flat diaphragm pressure sensor, or a flat weighing load cell.

Low cost pressure sensor. At present, ceramic pressure sensors are the ones that can effectively reduce the cost of industrial pressure sensors.

Ceramic pressure sensor is a pressure sensor refined from a thick ceramic base using a refined ceramic base.

SI-338 Ceramic pressure sensor uses ceramic or diffused silicon core. All stainless steel package, small and beautiful appearance. Suitable for occasions with limited installation space. Wide range temperature compensation, high accuracy, small size, no adjustment, wide range coverage. Support OEM processing. Ceramic pressure transmitter is used in compressor, air conditioning and other pressure measurement.

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How to adjust the miniature pressure switch?

Adjust the pressure switch adjustment screw clockwise, and then slowly adjust the pressure switch counterclockwise.
The adjustment of the pressure switch is not mysterious. The switch must be positioned in the original position and tighten the positioning screw until the pressure switch contact is released and stops.

Select a pressure switch/ controller with a set value range of 0.1～1.0Mpa

Turn the pressure adjustment screw on the top right side to make the pointer point at 0.8Mpa (8kg or 8bar) on the scale, this value is the upper limit switching value.

Turn the pressure adjustment screw on the left side of the top to make the pointer indicate 0.3Mpa on the scale.
Lower limit switching value = upper limit switching value-switch pressure difference=0.8-0.3=0.5, this value is the lower limit switching value. To

Connect the wiring terminal of the controller to the controlled electrical circuit.
Please note: ①It is public wiring. ③It is normally open terminal output. ⑤It is normally closed output. High voltage protection, please connect ① ⑤, during normal boosting, ①-⑤ connected (①-③ not connected). When the pressure rises to the set upper limit, that is, at 0.8Mpa, ①-⑤ no connection (①-③ connected).
When the pressure drops, ①-③ are connected at this time, and the pressure drops to the lower limit setpoint, which is 0.3Mpa. Then switch to ①-⑤ connected (①-③ not connected). When the pressure stops and the pressure rises, it will automatically cycle.

Turn on the power and let the pressure of the controlled medium (water, gas) rise.
Please pay attention to the adjustment and make the setting value of the pressure switch consistent with the indication of the pressure gauge.
If the pressure rises to the upper limit setting, the switch has not acted yet, that is, turn the pressure adjusting screw to fine-tune to the switching action, and repeat the verification again and perform the lower limit verification, the process is the same as above.
(Verify several times) Fix the pressure adjusting screw and the differential pressure adjusting screw on the top of the iron case of the pressure switch with red paint.

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Sino-Inst offers over 50 Miniature Pressure Switches for pressure measurement. About 50% of these are liquid pressure switches, 40% are gas pressure switches.

A wide variety of Miniature Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Miniature Pressure Switch instrumentation, located in China.

Pressure Switches

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What is a Pressure Switch?

The pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.

The pressure switch adopts a high-precision, high-stability pressure sensor, and transmission circuit. Then through the dedicated CPU modular signal processing technology, the detection, display, alarm, and control signal output of the medium pressure signal are realized.

Pressure switches can be widely used to measure and control the gauge pressure and absolute pressure of various gases and liquids in the fields of petroleum, chemical industry, metallurgy, electric power, water supply, and other fields.

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Featured Pressure Switches

Pressure switch types

Pressure switches can be divided into coil spring tube pressure switches, diaphragm pressure switches, bellows pressure switches, and bellows pressure switches according to the sensing elements.

Pressure switches can be divided into mechanical and electronic smart pressure switches according to their nature.

According to the setting value, the pressure switch can be divided into an adjustable pressure switch and a non-adjustable pressure switch.

Pressure switches can be divided into general pressure switches, small pressure switches, smart pressure switches, explosion-proof pressure switches, marine pressure switches, differential pressure switches, etc. according to applications.

You can learn more about pressure switches by wikipedia.

How does a pressure switch work?

The working principle of the pressure switch:

When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantaneously. Push the switch connector on or off through the connecting guide rod.

When the pressure drops to or rises to the rated recovery value, the disc is instantly reset and the switch automatically resets. Or simply when the measured pressure exceeds the rated value, the free end of the elastic element is displaced. Push the switch after connecting or comparing Element. Change the on-off state of the switch element to achieve the purpose of controlling the measured pressure.

The elastic elements used in the pressure switch include a single-turn spring tube, diaphragm, bellows and bellows. Switching elements include magnetic switches, mercury switches, micro switches, etc.

What is a pressure switch used for?

Pressure switches used in industrial machinery and systems must be robust, reliable, accurate, and have a long service life.

Pressure switches are usually used in paper machines, air compressors or pump sets.

In this type of equipment, we rely on pressure switches to act as safety devices, alarms, or control elements in the system.

Pressure switch air compressor
An ordinary air compressor consists of three main parts: an electric motor, a V-shaped air pump, and an air storage tank.

There is also a pressure switch in the air compressor, which can adjust the start and stop of the motor. By adjusting the pressure in the oil tank, the air compressor can rest.

The air compressor factory can set a certain starting and stopping pressure according to the requirements of different customers during the commissioning process.

For example, when the compressor starts, the air is pumped into the interior. When the pressure reaches the set value, the pressure switch will contact the contact to stop the motor. When the pressure is lower than the set value, the air compressor will start again to keep the pressure in the oil tank within the pressure range.

How do you test a pressure switch?

The calibration method of pressure switch:

  1. Find out the action setting value of the tested instrument according to the specification.
  2. Select an appropriate pressure signal source to pressurize the test meter. A standard pressure gauge with an appropriate range detects the signal pressure. Use a multimeter to measure the on and off states of the contacts.
  3. For the high report switch, slowly increase the pressure from low to high, and observe the multimeter. When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is the high reported value.
    Then slowly lower the pressure. When the multimeter indicates a sudden change again, the evaluation of the standard pressure gauge is the reset value.
  4. For the under-report switch, the test pressure should be increased above the set value first, and then slowly decreased.
    When the multimeter indicates a sudden change, the evaluation of the standard pressure gauge is a low value.
    Press again slowly, and when the multimeter indicates a sudden change again, the indication value of the standard pressure gauge is the reset value.

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Frequently asked questions

Pressure switches can be divided into three types: explosion-proof, mechanical, and electronic.

Extended reading: Pressure indicator transmitters

The pressure switch is a utility switch that actively turns on or off when the set value is reached according to the set pressure.
Pressure switches and pressure relays can only be opened or turned on under your given pressure to develop easy positional tube bundles. They are all on-off outputs.
Pressure relays generally supply more input nodes or node types than pressure switches.
The output of the pressure sensor can be an imitation signal or a digital signal. It is convenient for the subsequent level to deal with. It can also become a standard transmitter signal for short-range transmission.

As for the difference between pressure transmitter and pressure sensor, many people are not clear. I will tell you today:
The pressure sensor is a sensor that converts pressure into electrical signal output. When the output electrical signal is a standard signal (such as 4-20mA, 0-10mA, etc.), we call it a pressure transmitter. This is the difference between a pressure sensor and a pressure transmitter. So in general, the pressure sensor we often say is actually a pressure transmitter.

You’ll find the pressure switch mounted on a 1/4-in. tube near the pressure tank. It’s what senses when water pressure has dropped to the point where the pressure tank requires more water. The switch then powers up the well pump.

The working principle of the pressure switch: When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantaneously, and the switch connector is turned on or off through the connecting guide rod. When the pressure drops or rises At the rated recovery value, the disc is reset instantly and the switch automatically resets.

Of course, different pressure switches have different ways of resetting. If you need to reset a pressure switch, you’d better contact the manufacturer. Perform reset operation instructions.

Still have questions?

If you cannot find an answer to your question in our FAQ, you can always contact us
and we will be with you shortly.

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Sino-Inst offers over 50 Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Pressure Switch instrumentation, located in China.

Rroots Gas Meter

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Rroots Gas Meter is a meter that accurately measures gas flow. Based on the principle of volumetric measurement. It is an ideal natural gas and gas flow meter.

The flowmeter is composed of two parts: Roots flow sensor and display instrument. It is suitable for measuring non-corrosive gases such as natural gas, city gas, propane, nitrogen, and industrial inert gases. Mainly used in a gas commercial settlement in catering, hotels, and other industries. It can also be used as a standard flow meter.

Sino-Inst offers a variety of Oval Gear Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

RFQ
Volumetric Flow Meters

Features of Rroots Gas Meter

  1. High degree and good repeatability. The internal rotor is precision machined and balanced and tested, and it rotates without contact. Good oil lubrication ensures that the accuracy of the flowmeter remains unchanged and the working life is long.
  2. There is no need for straight pipes before and after the flowmeter, so it can be installed in a narrow environment.
  3. The starting flow is small and the range ratio is wide, which is suitable for measuring the gas flow with large changes.
  4. The measurement degree is not affected by pressure and flow changes, with stable performance and long life.
  5. Good versatility, all Roots flow sensors can use universal accessories.
  6. Configure RS-485 communication interface and IC card dedicated signal concentrator. It can also form a remote data acquisition machine monitoring system through GPRS/CDMA, internet and telephone network. It is convenient for centralized data collection and real-time management.
  7. The circuit adopts surface mount technology. Compact structure, strong anti-interference ability and high reliability.
  8. Adopt high-performance microprocessor and modern digital filtering technology. The software has powerful functions and superior performance.
  9. It adopts floating point calculation and five-segment meter coefficient automatic correction, and has fault self-diagnosis and alarm functions.
  10. Using micro-power high-tech, internal and external power supply to work. The power consumption of the whole machine is low, and it can work continuously for more than five years with only a 2#3.6VDC lithium battery.
  11. The flow value is displayed on the spot, with multiple signal output functions.
  12. A high-contrast liquid crystal display is used. It can display the standard cumulative flow, standard volume flow, working condition volume flow percentage, medium temperature, pressure value and battery consumption percentage.
  13. With real-time data storage function.
  14. The protection grade of the flowmeter housing is IP65.
  15. The explosion-proof mark is ExibllCT4.

Extended reading: Gas Mass Flow Meter

Specifications of Rroots Gas Meter

Executive standardMeasurement of gas flow in closed pipelines—”Gas Lumbar Flowmeter” (JB/T7385-94)
Caliber and connection method25, 40, 50, 65, 80, 100, 125, 150, 200, 250 are flanged
Accuracy class±1.5%R (±1%R needs to be specially made)*
Instrument materialBody: cast aluminum or cast iron; rotor: high-quality aluminum alloy; converter: cast aluminum
Conditions of UseMedium temperature: -10℃～+60℃ Ambient temperature: -30℃~+60℃;
Relative humidity: 5%～90% Atmospheric pressure: 86～106KPa
Power supplyA. External power supply: +24VDC±15%, ripple ≤±5%, suitable for 4-20mA output, pulse output, RS485, etc.
B. Internal power supply: 1 3.6VDC lithium battery, when the voltage is lower than 2.0, an undervoltage indication will appear.
Whole machine power consumptionA. External power supply: <1W;
B. Internal power supply: average power consumption ≤1W, can be used continuously for more than three years.
Output signalPulse signal, 4 ~ 20mA current signal, IC card control signal
Communication outputRS485 communication
Real-time recordingStart-stop record, daily record, fixed time interval record
Signal line interfaceInternal thread M20×1.5 or others
Explosion-proof gradeExibIICT4
Protection levelIP65

You may like: Natural Gas Flow Meter Types

Rroots Gas Meter Working Principle

Rroots Gas Meter structure

The flow meter is composed of two parts: Roots flow sensor and display instrument.

  1. End cover I
  2. Magnetic coupler
  3. Gland I
  4. Shell
  5. Waist wheel assembly
  6. Gland II
  7. Bearing
  8. End cover Ⅱ
  9. Synchronous gear
  10. Oil sling
  11. Oil cavity

The working principle of gas Roots flowmeter

Gas Roots flowmeter is a positive displacement flow meter.

When the gas passes through the flow meter, the pressure difference generated between the inlet and the outlet acts on a pair of waist wheels connected with high-precision synchronous gears to drive the waist wheels to rotate.

During this period, the enclosed space formed between the waist wheel and the inner wall of the housing and the gland is periodically inflated and exhausted by a metering chamber. The speed of the waist wheel is proportional to the volume of gas passing through the flow meter.

The rotation of the waist wheel is transmitted to the mechanical counter or output flow pulse signal through the magnetic coupler, so as to accumulate the volume flowing through the metering cavity to achieve the purpose of metering.

Extended reading: Buy Digital Gas Flow Meters & Controllers For Air-O2-N2-CO2

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Sino-Inst, Manufacuturer for Rroots Gas Meters. For example: crude oil flowmeter, diesel flowmeter, gasoline flowmeter.

Sino-Inst’s Rroots Gas Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Liquid Roots Meter

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Roots meter is also called Lumbar flow meter, which is a positive displacement flowmeter. Roots flowmeter for Liquid is called liquid Roots flowmeter. Gas Roots flowmeter is used for measuring gas.

Roots flowmeter is mainly used for high-precision measurement of continuous or intermittent measurement of liquid flow in pipelines. Waist wheel flowmeter can indicate cumulative flow, instantaneous flow, single volume, etc. It can also output pulse signal, 4-20mA or 1-5V analog signal, 232,485 communication, 4-20mA+HART, MODBUS protocol, etc.

Sino-Inst offers a variety of Oval Gear Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

RFQ
Volumetric Flow Meters

Features of Liquid Roots Meter

  • It has the characteristics of light weight, high precision up to 0.1-0.5 grade, and easy installation and use. It is one of the typical products of positive displacement flowmeter
  • This Liquid Roots Meter is manufactured by introducing advanced technology from BOPP&ReuthER from Germany and Oval from Japan.
  • Liquid Roots Meter can measure the flow of gasoline, kerosene, diesel and other oil products, and can transmit the flow to the secondary meter remotely through the transmitter.
  • Liquid Roots Meter consists of two parts: a housing and a counter. Customers can choose their own waist wheel flowmeter products according to the specific measuring medium.
  • Liquid Roots Meter can be equipped with pointer counter and electronic digital display counter, which can be displayed on site or remotely controlled.

Specifications of Liquid Roots Meter

The header shows:Pointer accumulation, zero return, pulse output, 4-20mA output, LCD display, communication output
Instrument model:LL-11 display, 12 display plus signal, 13 signal output, H zero return, T high temperature, Y liquid crystal display
Measuring medium:Liquid, various oils
Caliber specifications:15—150
Flow measurement range:0.25—250m3/h
measurement accuracy:0.5 level 0.2 level
Temperature of the measured medium:-20℃-100℃, maximum +200℃
Work pressure:1.6MPa 2.5MPa 6.4MPa
output signal:Pulse, 4–20mA
Communication type:RS485
power supply:DC12V—DC24V
Installation method:Flange connection
Explosion-proof grade:ExiaIIBT4
Protection level:IP65

Extended Reading: Liquid Turbine Flow Meter

Flow Range（m³/h）

Diameter(mm)
Liquid viscosity (mPa.s)
2.0~150
Liquid viscosity (mPa.s)
0.6~2.0
Liquid viscosity(mPa.s)
2.0~150
Liquid viscosity(mPa.s)
0.6~2.0
Liquid viscosity(mPa.s)
2.0~150
Liquid viscosity(mPa.s)
0.6~2.0
25 0.6~6 1.2~6 1.2~6 1.5~6 1.5~6 2~6
40 1.6~16 3.2~16 3.2~16 4~16 4~16 5~16
50 2.5~25 5~25 5~25 6~25 6~25 8~25
80 6~60 12~60 12~60 15~60 15~60 20~60
100 10~100 20~100 20~100 25~100 25~100 33~100
150 25~250 50~250 50~250 60~250 60~250 80~250
Accuracy class 0.5 level 0.3 level 0.2 level

The main materials and nominal pressure are as follows:

Model Shell, front cover, back cover Cover Rotor axis Shaft sleeve Nominal pressure(MPa)
LL-AL cast iron cast iron Aluminum alloy stainless steel Ball bearing 0.6、1.0、1.6
LL-EL Cast steel cast iron Aluminum alloy stainless steel Ball bearing 2.5、4.0
LL-LL Aluminum alloy Cast iron/stainless steel Aluminum alloy stainless steel Ball bearing 0.6、1.0、1.6
Remarks Special contract can be specially designed

Extended reading: Liquid mass flow controller

LL-AL cast iron waist wheel flowmeter is widely used in the measurement of various oil products and liquid media that does not corrode cast iron materials.
LL-EL cast steel waist wheel flowmeter is used for the measurement of high pressure and low corrosive media.
The LL-LL cast aluminum light waist wheel flowmeter is suitable for the measurement of low viscosity, low pressure, and low corrosion (such as water, etc.) media.

Read more about: Liquid Flow Meters Guide

How does a Roots meter work?

Roots meter is also called waist flow meter. The working principle is the same as that of the oval gear flowmeter, and the structure is also very similar, except that the shape of the rotor is slightly different.

The rotor of the Roots meter is a pair of waist-shaped wheels without teeth. During the rotation, the two waist wheels do not directly contact and maintain a small gap. The driving is completed by the meshing gear that is sleeved outside the shell and coaxial with the waist wheel. This has obvious advantages compared with oval gear flow meters.

Oval gears have large meshing contact wear and are greatly affected by the cleanliness of the measured fluid. Easy to damage and reduce accuracy.

The Roots meter is linked by an additional drive gear, so there is no contact between the measuring elements during operation. Therefore, the wear during operation is very small, and high measurement accuracy can be achieved. It can keep the long-term stable parts of the flowmeter.

The structure of the waist wheel flowmeter can be divided into vertical and horizontal according to the working state:

The structure of the waist wheel includes a pair of waist wheels and a combined waist wheel composed of two pairs of waist wheels at an angle of 450 to each other.

The combined waist wheel flowmeter runs smoothly, which can greatly reduce the pressure fluctuation in the pipeline.

Generally, large-diameter flowmeters use vertical or horizontal combined waist wheels to reduce or eliminate pipeline vibration caused during flow measurement.

The rotor line of the waist wheel flowmeter is more reasonable, allowing the measurement of fluids containing tiny particles. Can be used for gas and liquid measurement. It is a positive displacement flowmeter that has been rapidly developed and widely used in recent years.

In addition to being used for industrial measurement, Roots meter is also used as a standard flow meter to calibrate other types of flow meters. The accuracy can reach ±0.1%.

Read more about: Positive Displacement Flow meter Technology

Types of positive displacement flow meter

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Magnetic Water Flow Meter

Sino-Inst, Manufacuturer for Liquid Roots Meters. For example: crude oil flowmeter, diesel flowmeter, gasoline flowmeter.

Sino-Inst’s Liquid Roots Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Helical Gear-PD Flow Meter

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PD Flow Meter is referred to as positive displacement flowmeter. Helical Gear-PD Flow Meter is also called, spiral double rotor flowmeter, LLT, LZ double rotor flowmeter or UF-Ⅱ spiral rotor flowmeter.

As a high-precision flow meter, PD Flow Meter has an accuracy of 0.2 level. It is especially suitable for the measurement of industrial liquids such as crude oil, refined oil and light hydrocarbons. It is a new generation volumetric flowmeter. Because it uses a pair of spiral rotors with special teeth, it is also called “Helical Gear Flowmeter”.

Sino-Inst offers a variety of Oval Gear Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

RFQ
Volumetric Flow Meters

Features of Helical Gear-PD Flow Meter

  1. Notable features such as no pulsation, extremely low noise, high precision, high reliability, large flow, and strong environmental adaptability.
  2. The spiral rotor flowmeter can indicate cumulative flow, instantaneous flow, single flow, etc. on site.
  3. It can output pulse signal, 4-20mA or 1-5V analog signal, 4-20mA+HART, MODBUS, support 232,485 communication, etc.
  4. Combined with mechanical batch controller or electronic batch controller, it can realize various functions such as different types of filling and batch control.
  5. The spiral rotor rotates at a constant speed in the metering cavity, and the flow is constant.
  6. The spiral rotor rotates at a constant speed and the fluid pulsation is small.
  7. The sending pulse is stable and accurate.
  8. Various counters, speed regulators and external fine regulators can be configured.
  9. Can be installed vertically (limited to DN200 or less, please specify when ordering)
  10. It is suitable for thin oil, light oil, heavy oil, crude oil with large sand content and large water content, and the measured liquid has a large viscosity range.
  11. The flow of liquid through the flowmeter is large, and the maximum flow is about twice that of an ordinary volume meter with the same diameter.
  12. Long service life, high accuracy and strong reliability.
  13. The internal pressure loss is extremely small.
  14. The longest distance of wired remote transmission is 1000 meters, pulse signal output N=0.1L (one pulse is 1N), and it can be directly connected to the computer.
  15. Intrinsically safe explosion-proof IaⅡCT6 (intrinsically safe type); explosion-proof dⅡBT6 (explosion-proof type); protection IP56.

Read more about Everything You Need To Know About Electronic Flow Meters

Specifications of Helical Gear-PD Flow Meter

Technical Parameters

Nominal diameter (mm)8-400
Accuracy0.2/0.5 level
Pressure loss0-1000mPa.s‹80KPa; 1000-20000mPa.s‹150KPa
Nominal pressure1.6, 2.5, 4.0, 6.4MPa
temperature range-20℃-+80℃, +80℃+150℃, +150℃-+250℃
Medium viscosity0-2000mPa.s
Ambient temperature-30℃-+70℃
Connecting flangeGB9115.0719-2000 JB/TB2-94; It can also be manufactured according to user-specified flange standards
Photoelectric pulse (current) converterExplosion-proof mark: ExdⅡBT4 ExdⅡBT4 (excluding acetylene)
Electronic counterExplosion-proof mark: ExdⅡBT4 (without acetylene)
Protection levelIP65

Extended reading: Orifice Plate Flow Meter

Material selection

Model Shell, front cover, back cover Cover Spiral rotor Shaft Shaft sleeve Nominal pressure (MPa)
LLT-E Cast steel cast iron Cast iron, aluminum alloy, stainless steel stainless steel Graphite, rolling bearings Below DN100 -4.0
Above DN150-2.5
LLT-B、C stainless steel stainless steel stainless steel 1.6、2.0、2.5
LLT-S Double body type flowmeter;
Specifications are DN80, DN100, DN150;
Nominal pressure 6.3MPa, DN200 nominal pressure 4.0MPa
Note The material of LLT-C is OCr18Ni12Mo2Ti;
The material of LLT-B is OCr18Ni9Ti;
Special requirements can be specially designed.

Flow range (m³/h)

Table 1, Accuracy 0.5

Model Diameter Viscosity mPa.s
0.3~0.8 0.8~2 2~15 15~400 400~1000 1000~2000 2000~3500
Petrol Kerosene Diesel, engine oil Heavy oil High viscosity liquids
LLT-0252 25 3~9 1.5~10 1~10 1~10 1~8 1~8 1~6
LLT-0401 40 3~9 1.5~10 1~10 1~10 1~8 1~8 1~6
LLT-0402 7~20 3~22 2.5~25 2.5~25 2~18 2~18 3~12
LLT-0501 50 7~20 3~22 2.5~25 2.5~25 2~18 2~18 3~12
LLT-0502 9~36 4.5~36 3.6~36 3.6~36 2.8~25 2.8~25 4.5~18
LLT-0801 80 9~36 4.5~36 3.6~36 3.6~36 2.8~25 2.8~25 4.5~18
LLT-0802 20~80 10~80 10~100 10~100 6.5~56 6.5~56 5~40
LLT-1001 100 20~80 10~80 10~100 10~100 6.5~56 6.5~56 5~40
LLT-1002 25~100 18~100 15~150 15~150 8.5~80 8.5~80 6.5~55
LLT-1501 150 25~100 18~100 15~150 15~150 8.5~80 8.5~80 6.5~55
LLT-1502 55~225 30~250 25~250 25~250 18~150 18~150 10~100
LLT-2001 200 55~225 30~250 25~250 25~250 18~150 18~150 10~100
LLT-2002 90~360 50~400 40~400 40~400 28~240 28~240 20~160
LLT-2501 250 90~360 50~400 40~400 40~400 28~240 28~240 20~160
LLT-2502 130~540 65~540 60~600 60~600 42~360 42~360 30~240
LLT-3001 300 130~540 65~540 60~600 60~600 42~360 42~360 30~240
LLT-3002 220~800 110~900 95~950 95~950 70~600 70~600 54~450
LLT-3501 350 220~800 110~900 95~950 95~950 70~600 70~600 54~450

Table two, Accuracy level 0.2

Model Diameter Viscosity mPa.s
0.3~0.8 0.8~2 2~15 15~400 400~1000 1000~2000 2000~3500
Petrol Kerosene Diesel, engine oil Heavy oil High viscosity liquids
LLT-0252 25 3.5~8 3~10 2~10 2~10 2~8 2~8 2~6
LLT-0401 40 3.5~8 3~10 2~10 2~10 2~8 2~8 2~6
LLT-0402 8~20 5.5~22 4.5~22 4.5~22 4~18 4~18 3~12
LLT-0501 50 8~20 5.5~22 4.5~22 4.5~22 4~18 4~18 3~12
LLT-0502 15~36 9~36 7~36 7~36 6~25 6~25 4.5~18
LLT-0801 80 15~36 9~36 7~36 7~36 6~25 6~25 4.5~18
LLT-0802 30~80 20~80 15~80 15~80 14~56 14~56 10~40
LLT-1001 100 30~80 20~80 15~80 15~80 14~56 14~56 10~40
LLT-1002 40~100 25~100 20~120 20~120 18~72 18~72 14~55
LLT-1501 150 40~100 25~100 20~120 20~120 18~72 18~72 14~55
LLT-1502 88~220 57~225 44~220 44~220 38~150 38~150 25~100
LLT-2001 200 88~220 57~225 44~220 44~220 38~150 38~150 25~100
LLT-2002 150~360 90~360 72~360 72~360 50~210 50~210 40~160
LLT-2501 250 150~360 90~360 72~360 72~360 50~210 50~210 40~160
LLT-2502 180~540 135~540 100~540 100~540 90~360 90~360 60~240
LLT-3001 300 180~540 135~540 100~540 100~540 90~360 90~360 60~240
LLT-3002 250~800 220~900 180~900 180~900 150~600 150~600 110~450
LLT-3501 350 250~800 220~900 180~900 180~900 150~600 150~600 110~450

Remarks: For special requirements, class 0.3 and class 0.1 flowmeters can be provided

Read more about: Industrial Oil Flow Meters

How does a PD meter work?

The flow meter is mainly composed of a body, a pair of spiral rotors, a magnetic coupling, a reduction mechanism, an adjusting gear, a counter and a signalling device.

The number of revolutions of the spiral rotor is transmitted to the meter head counter through a reduction mechanism composed of a magnetic coupling and a series of gears.

The magnetic coupling is mainly composed of active magnetic steel and driven magnetic steel. The use of magnetic coupling can increase the working pressure and working temperature of the flowmeter, ensure safe operation, and reduce maintenance work.

Extended reading: Positive Displacement Flow meter Technology

The measurement chamber mainly has a sealed cavity formed by a pair of special rotors and cover plates as the flow measurement unit.

The rotor is driven by the pressure difference between the inlet and outlet of the flowmeter to rotate, so as to continuously measure the liquid at the inlet to the outlet after being measured in the sealed cavity.

The amount of liquid flowing through each revolution is eight times that of the sealed cavity in the figure. The total number of rotor rotations and the speed of rotation are transmitted to the counting mechanism by the sealed coupling. Then there is pointer display and word wheel accumulation, you can know that it passes through the pipeline Total amount of liquid.

A pulse transmitter can also be installed in the counting mechanism, which becomes a flow meter with a signal.

Matching with the company’s electric display instrument, it can realize remote transmission (quantity, accumulation, instant and other functions) automatic measurement and control.

Read more about: Liquid Flow Meters Guide

Gear types of PD flowmeter:

SPUR GEAR

In Spur gear positive displacement flow meters, fluid travels around two round gears and is pushed through the meter’s internal chamber from inlet to outlet. The discrete volume of liquid trapped between each gear tooth is measured, as opposed to the Oval gear meter where a much larger volume between gears is swept through the chamber.

HELICAL GEAR

Possibly the most accurate PD meter in which two intersecting cylindrical bores are fitted with two interlocking helical screw-shaped gears. Because gear orientation is inline with flow, as the fluid passes through, the gears rotate with very little pressure drop. These flow meters are highly accurate over wide flow ranges and are compatible with very high viscosity fluids.

ROTARY PISTON

In this design a rotary piston oscillates in the circular internal chamber displacing a fixed amount of fluid with each rotation. This style accommodates ultra low flows and high flows, as well as high pressures.

Extended reading: Cylinder Gear flow meter for micro flow measurement.

More Featured PD Flow Meters

Pointer Type Oval Gear Flow Meter
LCD display Oval Gear High Viscosity Flow Meter
High Temperature Oval Gear Flow Meter – Heating oil
Oval Gear-Marine Fuel Flow Meter
Thermal insulation Oval Gear flow meter
Clamp Filling Oval Gear Positive Displacement Flow Meter
Micro Flow Meter

Sino-Inst, Manufacuturer for Helical Gear-PD Flow Meters. For example: crude oil flowmeter, diesel flowmeter, gasoline flowmeter.

Sino-Inst’s Helical Gear-PD Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Micro Flow Meter

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Micro Flow Meter is a micro oval gear flow meter. It is a kind of positive displacement flow meter. Suitable for flow measurement of micro liquid flow rate.

Micro Flow Meter for liquid low flow rate

  • Micro flow 0.5ml/min
  • All stainless steel 316L material
  • 0.5% high precision, quantitative control
  • Standard pressure 32Bar, high pressure can be customized, maximum pressure 1000Bar
  • Suitable for various chemical liquids

Sino-Inst offers a variety of Oval Gear Flow Meters for flow measurement. If you have any questions, please contact our sales engineers.

RFQ
Volumetric Flow Meters

Micro Flow Meter Specifications

Micro flow meter for low viscosity liquid

MediumSuitable for liquids, weakly corrosive chemical media
For example: water; oil; glue; polyurethane, etc.
PrecisionStandard accuracy +/-0.5%
High viscosity accuracy can reach 0.2%
pressureStandard withstand pressure 32Bar
Accept high pressure customization, high pressure up to 1000Bar
temperatureStandard temperature range -30~80℃
The highest temperature of stainless steel series is 200℃
OutputHall & dry reed tube pulse output
powered by4~26VDC power supply
Stainless steel series
MaterialShell: SS316L
Gear: SS316L
Bearing: SS316L
mediumSuitable for weakly corrosive liquids; such as: water; polyurethane
Aluminum alloy series
MaterialShell: Anodized Aluminum
Gear: Anodized aluminum
Bearing: SS316L
mediumNon-corrosive liquid; such as: gasoline; aviation kerosene

Micro flow meter for high viscosity liquid

MediumSuitable for liquids and high-viscosity media
For example: water; oil; glue; polyurethane, etc.
PrecisionStandard accuracy +/-0.5%
pressureWithstand pressure 200Bar
temperatureStandard temperature range -30~80℃
The highest temperature of stainless steel series is 250℃
OutputHall & dry reed tube pulse output
BearingBall bearing or PEEK bearing
powered by4~26VDC power supply
Stainless steel series
MaterialShell: SS316L
Gear: SS316L
Bearing: SS316L
mediumSuitable for high-viscosity liquids; such as glue; polyurethane
Aluminum alloy series
MaterialShell: Anodized Aluminum
Gear:  SS316L
Bearing: SS316L
mediumNon-corrosive liquid; such as: gasoline; aviation kerosene
Model CX-M2  CX-M3  CX-M5  CX-M6 
Flow range 0.5~150mL/min  3~300mL/min  5~1000mL/min  0.5~100L/H 
connection G1/8 Female thread G1/8 Female thread G1/8 Female thread G1/4 Female thread
medium Suitable for various chemical liquids
Precision 0.50%
temperature -30℃ to 80℃
pressure 32Bar (high pressure can be customized)
Output Square wave pulse
powered by 4~26VDC
Material Stainless steel material, aluminum material
Model CX-M9 CX-M12 CX-M25 CX-M40 CX-M50
Flow range 6~600L/H 0.3~30L/min 0.5~100L/min 10~250L/min 15~500L/min
connection G1/4 Female thread G1/2 Female thread G1 Female thread G1.5 Female thread G2 Female thread
medium Suitable for various chemical liquids
Precision 0.005
temperature -30℃ to 80℃
pressure 32Bar (high pressure can be customized)
Output Square wave pulse
powered by 4~26VDC
Material Stainless steel material, aluminum material

Features of Micro Flow Meter

Quantitative control of micro liquid flow & flow monitoring.

The standard minimum flow rate of the micro flowmeter is 0.5ml/min.

The standard accuracy of the micro flowmeter is 0.5%. The cutting accuracy of the CNC machining center is 0.001mm.
For high viscosity media, such as glue, the accuracy can reach 0.2%.

The maximum range ratio of the standard product is 1:200, and the minimum range ratio is 1:100
The new M2.1 is the latest research and development. The flow range is 1~800ml/min, and the turndown ratio reaches 1~800.
To meet more working conditions, it is more suitable for test bench working conditions.

Two materials of stainless steel and aluminum alloy are available.

Extended reading: Micro flow meters for low flow liquids

Micro Flow Meter Dimension

Extended reading:
What is the K-factor in a flow meter?
Cryogenic Flow Meters|Liquid Nitrogen-Liquid Oxygen-LNG fluids

The Micro Flow Meter we supply is a gear flow meter.

Gear flow transmitter belongs to volumetric flowmeter and measure volume and flow precisely. The flowing medium makes the gear engage and rotate.

Under the flowing effect of fluid, pressure difference is formed between the inlet and outlet of instrument. One pair of gears can rotate freely without the need of power supply. The empty cavity between gears is filled with liquid, which is discharged through rotation.

The liquid flowing through instrument and liquid flow can be known through measuring the number of revolutions of gear.

Extended reading: Cylinder Gear flow meter for micro flow measurement.

The rotation speed of the transmitter is detected by the sensing coil inside the signal amplifier on the case.

The signal amplifier cannot touch the measured medium. Due to the cutting of the transmitter gear, the magnetic field lines generated inside the permanent magnet inside the housing will cause the magnetic flux inside the induction coil to change.

The sensing coil sends the signal of flux change cycle detected to the pre-amplifier so as to amplify and shape the signal.

The impulse signal which is in direct ratio with flow velocity will be sent to the unit conversion and flow integration circuit. To obtain and display the accumulative flow valve.

At the same time, it will also send the impulse signal to frequency current conversion circuit. To convert the impulse signal to simulation amperage so as to display the instantaneous flow value.
The transmitter has high processing precision and can be installed precisely.

The gear rotation undergoes non-contact scanning. One impulse is generated by one gear with very high resolution. The column gear transmission can measure the liquid with very small flow and small quantitative volume.

Read more about: Positive Displacement Flow meter Technology

High temperature oil measurement

The micro flowmeter can be customized for high temperature.

Since the material is all stainless steel 3161, the maximum temperature can be customized to 200°C.

The commonly used custom temperature is 120°C.

Applicable working conditions: hot melt adhesive; heat transfer oil and other high-temperature working conditions.

Extended reading: Sanitary Positive Displacement Flow Meter

High-pressure measurement

The micro flowmeter can be customized for high pressure.

By strengthening the shell, more bolts are added to achieve the function of high-pressure resistance.

The material itself is stainless steel is also a prerequisite for achieving high pressure.

The maximum high pressure of 1000Bar can be customized.

In the case of high pressure resistance, the service life and low-cost after-sales service are guaranteed at the same time.

Applicable working conditions: hydraulic oil; hydraulic system; high-pressure working conditions such as lubricating oil

Extended reading: Stainless steel flow meters|304-316 optional

The products described in this article are not suitable for measuring oxygen or liquid oxygen.
If you need to measure oxygen (O2) or liquid oxygen (LO2), perhaps you can refer to:

For oxygen gas flow measurement

The gear flow meter is a micro digital positive displacement flow meter. Can measure very small flow rates and quantify small volumes of liquid. High and low-temperature resistance (-196℃-200℃).

For liquid oxygen flow measurement

Precession vortex flowmeter is a new type of gas flowmeter. It can be used for the measurement of natural gas, propane, air, nitrogen, and other gases.

Read more about Liquid Flow Meters Guide

Nitrogen Gas Flowmeters-Liquid Nitrogen Flowmeters

This flowmeter is also called a handheld digital air flow meter. Suitable for small gas flow monitoring.

  • MEMS flow measurement technology application
  • Battery-powered, portable design
  • RS485 communication mode can realize centralized network management
  • Real-time monitoring of instantaneous flow and calculation of cumulative flow
  • Password management, over-limit alarm
  • Small size, easy to install
  • Low cost and maintenance-free

Converter Tool: Volumetric Flow Rate & Pipe Diameter to Flow Speed Calculator

Performance parameterMF5706MF5712Unit
Range0~10,250~200L/min
Precision+(2+0.5FS)+(2.5+0.5FS)%
Repeatability0.5%
Response time≤2sec
Power supply4 AA batteries or external adapter power supply
Power consumption≤10mW
Output FS485 (Optional)
DisplayLCD
Display unitInstantaneous flow SLPM (L/min), cumulative flow NCM (M3)
display resolution0.010.1L/min
keyboardThree button
Function descriptionPassword setting.
Set the total amount and clear it.
Alarm function
Work pressure≤0.8mpa
Operating temperature-10~+55℃
Pressure loss≤600≤2000pa
Working time period (battery)＞60days
Standard calibration gasNitrogen
Lead wireDedicated minUSB connection communication cable (optional)
Caliber6mm12mm
Mechanical interfaceNPT-1/4NPT-1/2
WeightAbout 300g

Extended reading: What is Modbus Protocol?

ModelCliberMechanical interfaceFLow Range: SLPMFLow Range: NCMH
MF57066mm1/4″10
25		0.6
1.5
MF571212mm1/2″20012

Guess you like: Understand The Background Of Gas Mass Flow Meter Now

Micro Motion Coriolis Flow Meter is a flow meter made according to the Coriolis acceleration theory. Z-Series Straight Tube Micro Motion Coriolis Flow Meter simultaneously measures mass flow, density, temperature and viscosity.

Liquid Accuracy / Repeatabilityup to ±0.2± of rate (up to ±0.1± of rate)
Gas Accuracy / Repeatability±0.20± of rate
Density Accuracy / Repeatability±0.002 g/cm3 (±0.0005 g/cm3)
Line Size1/4″ (DN8) – 2″ (DN50)
Pressure Rangeup to 1450 psig (100 barg)
Temperature Range-60 to 300 F (-51 to 149 C)

Read more about: The Pros and Cons of Micro Motion Flow Transmitters

Clamp-on Micro Flow Sensor

Strap on flow meter X3 is a kind of ultrasonic external clamp-on flow meter. Strap on flow meter X3 is easy to install. Suitable for measuring pipe diameter Φ9.53~Φ90.

Strap on flow meter X3 can meet the needs of different pipe materials: stainless steel pipe, carbon steel pipe, copper pipe, plastic pipe, PVC, PVDF, PPH, PPE, etc.

Strap on flow meter X3 almost meets the measurement of different clean fluids: various acids, alcohols, chemical solvents, alcohol, drinking water, Coca-Cola water… etc.

ProductStrap on Flow meter
ModelX3
Flow range0.1m/s~5.0m/s
Accuracy±2.0%
Repeatability0.80%
Pipe sizeφ6.35~φ90
Data storageDaily, monthly, and Annual. Flow Totalizer
Analog output4~20mA, Maximum load: 600Ω
Alarm outputDCT, Upper and lower limit alarm function(optional)
CommunicationRS485,support Modbus communication protocol
Power supply24VDC
Cable length2.0m
KeypadFour light touch buttons
ScreenOLED 128*64 displayscreen
UnitsMetric and imperial units are available, Cubic Meters(m3), Liters(L), USA Gallons(GAL)/hour,/min,Default unit setting:m3/h
TotalizerSix bit digit
Piper materialStainless steel pipe, carbon steel pipe, copper pipe, plastic pipe
Case materialAluminum alloy
Environment temp.0℃~50℃（32°F~122°F)
Medium temp.0℃~50℃（32°F~122°F)
Environment humidit0-95% relative humidity, without condensation
IP GradeIP54

Read more about: Strap on flow meter X3

More Featured Liquid Flow Meters

Magnetic Water Flow Meter
Remote Magnetic Sewage Flow Meter
Insertion Magnetic Flow Meter
Magnetic Sanitary Flow Meter
Liquid Turbine Flow Meter
Handheld Ultrasonic Flow Meter
Ultrasonic Clamp on Flow Meter
In-Line Ultrasonic Flow Meter
Oval Gear-Marine Fuel Flow Meter
Clamp Filling Oval Gear Positive Displacement Flow Meter

Frequently
Asked
Questions

Help Center

If the flowmeter is classified according to the measuring medium. Then flow meters can be simply divided into two categories: gas flow meters and liquid flow meters.

However, according to other criteria, it can be divided in more detail:

  1. According to the measurement principle, there are:

Principles of mechanics, thermal principles, acoustic principles, electrical principles, optical principles, atomic physics principles, etc.

  1. According to the structural principle of the flowmeter, it is classified into:

Volumetric flowmeters, differential pressure flowmeters, rotameters, turbine flowmeters, electromagnetic flowmeters, vortex flowmeters, mass flowmeters and insertion flowmeters, probe flowmeters in fluid oscillating flowmeters.

Extended reading: How to choose a high viscosity flow meter?

Micro flow sensor refers to a type of flow meter that can be used to measure micro flow monitoring.

Extended reading: High Pressure Hydraulic Flow Meter

The difference between a flow meter and a flow sensor. The main points are as follows:

  1. It can be said that the flow sensor is part of the flow meter. The sensors include flow sensors and flow meters, which belong to a broad category.

Specifically: the flow sensor can measure the specific flow value. For example, a water meter, which is actually a flow meter. But there is a flow sensor in the flow meter. A flow meter is a combination of a flow sensor and a meter display. When the water flow passes through the flow sensor, the flow sensor transmits the record to the meter head. The header displays it in front of the user according to the data.

  1. The flowmeter generally refers to those sensors that can be read directly, and specifically refers to those measuring elements that can convert the measured flow value into an electrical signal for processing by the processor.
  2. The flow meter is used for measurement, and it gives the quantity of medium flowing through per unit time (flow rate such as ton/hour). Flow sensors determine the fluid flow state, and some (but not all) of the sensor signals can be processed to generate a flow signal. If this sensor is integrated with other components, it is a flowmeter.
  3. According to the professional method, the functional flow meter is for measurement. It mainly measures the flow, and the accuracy is the main parameter of the flowmeter. Flow sensor is signal output, electrical signal, pulse signal. Also known as analog output. is for flow control.

Extended reading: What is an air pressure transducer?

Different types of flowmeters work differently.

  • Differential Pressure Flowmeters
  • Velocity Flowmeters
  • Positive Displacement Flowmeters
  • Mass Flowmeters
  • For Open Channel Flowmeters – weirs, flumes, submerged orifices, current meters, acoustic flow meters and more

For different working principle, We offer different types of flow meters, like:

Extended reading: High Temperature Flow Meter

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Sino-Inst, Manufacuturer for Micro Flow Meters. For example: crude oil flowmeter, diesel flowmeter, gasoline flowmeter.

Sino-Inst’s Micro Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.