Monthly Archives: March 2021

Ultrasonic Water Meter for Residential Water

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Ultrasonic water meter is a new small residential water meter. Residential ultrasonic water meters are equipped with line water meters, and wireless water meters can be customized.

Ultrasonic Water Meter for Residential Water

T3-1-2-H residential ultrasonic water meter adopts ultrasonic time difference measurement technology. A highly integrated, developed according to ISO4064-1:2005, GB/T778.1-2007 and other standards. A new generation of fully digital water meter with the advantages of high turndown ratio, ultra-low starting flow, and rich communication methods. IP68 protection level.

Sino-Inst offers a variety of  Ultrasonic flow meters for flow measurement. If you have any questions, please contact our sales engineers.

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Ultrasonic Flow Meters

Features of Ultrasonic water meter T3-1-2-H

T3-1-2-H ultrasonic water meter has wired type as standard configuration, wireless type need to be customized.

Specifications of Ultrasonic water meter T3-1-2-H

PerformanceParameters
Working Pressure2.5MPa
TemperatureT30
Working Environment-25°~55°C, IP68 Protection
Pressure Loss△P63
Display RangeMulti-lines show 9-bit cumulative flow,6-bit instantaneous flow, signal strength flow direction, error, communication status
Unitm3, USG, Liter, cubic foot, Acre Feet
Operating ModeTwo capacitive touch keys support sliding operation.
Communication InterfacePhysically independent RS485 and infrared interface. LORA/ NB-IOT, WIFI, USART are optional.
OutputMBUS,MODBUS,ASCII,CJ188
Communication Protocol3.6V 4Ah lithium battery (battery life> 10 years), It will operate power save functions when there is no water and flow in pipe.
Power SupplyDC12-30V extemal power supply through MBUS interface, data will be permanently saved after power off.
Power consumption<0.1mW
MaterialPipe body:copper;others:PEEK

Flow rate:

Diameter Turndown ratio Flow（m³/h）
  (mm）    R Starting flow Minimum flow Q1 Boundary flow Q2 Common flow Q3 Overload flow Q4
DN15 200 0.003 0.013 0.02 2.5 3.125
DN20 200 0.004 0.016 0.026 3.2 4
DN25 100 0.01 0.04 0.064 4 5
DN32 100 0.016 0.063 0.101 6.3 7.875
DN40 100 0.05 0.2 0.32 20 25

Read more about: How does a residential water meter work?

ultrasonic water meter lorawan

With the progress of the times, the ultrasonic water meters we use are becoming more and more intelligent. Technology makes the meter reading fee smarter. Today’s main prominent ultrasonic water meters can generally be customized according to customer needs. Wired remote ultrasonic water meters, NB-loT ultrasonic water meters There are three types of water meters and LoRa ultrasonic water meters. However, most people don’t know much about these three types, especially LoRa ultrasonic water meters, and few people know about them?

Today, I will introduce to you the LoRa ultrasonic water meter produced by our company. I hope that through the introduction, you will have a better understanding!

The birth of LoRa is earlier than that of NB-loT. LoRa works in unlicensed frequency bands, so no additional fees are required. The LoRa protocol is simpler and easier to develop than NB-loT, and the relative cost is less. LoRa nodes can sleep longer or shorter according to the needs of specific application scenarios, and the battery life is longer.

LoRa Smart Ultrasonic Water Meter: Using advanced wireless transmission technology to achieve remote centralized reading of remote water meters, concentrators, and computers, without wiring, simple and convenient construction, and effectively solve the problem of difficult meter reading.

The remote water meter utilizes the wireless networking of the meter. Signal coverage without gaps. No meter reading blind spots, valve anti-rust function design. The valve can be opened and closed automatically.

Frequency automatic calibration technology: automatic adjustment of operating parameters. Effectively avoid frequency offset caused by environmental changes. Achieve super high meter reading rate.

Electromagnetic wave wake-up technology: Wake up the target smart meter to make it in the communication state during meter reading, and automatically return to the ultra-low power consumption state after meter reading, saving energy and reducing consumption.

A variety of meter reading methods are available, and wireless centralized reading system and handheld meter reading device meter reading system are selected according to different needs.

Two modes of timed uploading and real-time uploading can be selected to meet different customers’ needs.

High waterproof grade design, the protection grade can reach IP68. Using imported communication chips, it has the characteristics of high performance and low power consumption.

Extended reading: Magnetic water meter-ultrasonic water meter-mechanical water meter

Ultrasonic water meter working principle

The ultrasonic water meter adopts the time difference method to measure the flow. That is, an ultrasonic transducer is installed at the upstream and downstream of the measuring channel (pipe section) to transmit and receive ultrasonic signals.

Because the ultrasonic signal and the water flow signal are superimposed, the propagation speed of the sound wave is different in the forward and reverse flow. Therefore, the running time of the ultrasonic signal emitted by different transducers in the water is different. The fluid can be calculated by measuring the difference of the time The flow rate. Then it is converted into a flow rate, so as to realize the measurement of the flow rate.

There are two transducers on the top of the flow tube. Transducer A transmits an ultrasonic signal to transducer B (downstream), while transducer B transmits an ultrasonic signal to transducer A (countercurrent). Downstream and The countercurrent ultrasonic signal forms a certain time difference in the transmission process. In the case of the calibrated cross-sectional area of ​​the pipe diameter and the length of the standard measuring pipe, the flow rate of the meter is calculated by the calculation chip on the integrator.

Advantages and disadvantages of ultrasonic water meters

Ultrasonic water meter is a fully electronic water meter manufactured with industrial-grade electronic components using the principle of ultrasonic time difference. Compared with mechanical water meters, it has the characteristics of high accuracy, good reliability, wide range ratio, long service life, no moving parts, no need to set parameters, and installation at any angle.

The ultrasonic water meter has no moving or blocking parts in the tested pipeline, no wear, and low pressure loss. High sensitivity, can detect small changes in flow rate. At the same time, it has almost no requirements for the measured medium, has an extremely wide range ratio, and the ultrasonic water meter has a simple structure and is easy to maintain, which is very suitable for civil and industrial measurement.

But the stability of ultrasonic water meters is low.

Extended Reading: Chilled Water Flow Meter

Ultrasonic water meter Application

  1. Residential water metering and control.
  2. Industrial process measurement and control.
  3. Replace mechanical flow meters to improve measurement reliability.
  4. Replace all kinds of tightly high-performance flow meters.

Ultrasonic water meter clamp-on

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.

Portable ultrasonic flow meter

Handheld ultrasonic flow meter realizes the non-contact measurement of liquid flow. Also often referred to as Portable Clamp-On Ultrasonic Flow Meter for Liquids.

Handheld Ultrasonic Flow Meter ( Model:2000H) has been successfully applied to measurement work in various industries. The measuring range is 20-6000mm (0.5-20 inches). A non-contact measurement method is adopted. Flexible operation and easy to carry. Conductive or non-conductive, corrosive or non-corrosive liquids can be measured. Various fluids: water, pure water, sewage, sea water, chemical fluids, river water, fuel Oil etc. can be measured.

Handheld Ultrasonic Flow Meter Reference price: USD 470.00/pc

Extended reading: Portable ultrasonic flow meter for water

Featured Digital water meters for sale

Portable Ultrasonic Flow Meter
Handheld Ultrasonic Flow Meter
Ultrasonic Clamp on Flow Meter
Strap on flow meter X3
In-Line Ultrasonic Flow Meter
Dual Channel Ultrasonic Water Meter
Insertion Ultrasonic Water Flow Meter
Magnetic Water Flow Meter
Remote Magnetic Sewage Flow Meter
Insertion Magnetic Flow Meter
Magnetic Sanitary Flow Meter

Frequently
Asked
Questions

Help Center

The measurement accuracy of the ultrasonic flowmeter is very high. Almost no interference from various parameters of the measured medium. In particular, it can solve the flow measurement problems of strong corrosive, non-conductive, radioactive and flammable and explosive media that other instruments cannot.
So what causes the inaccurate measurement of the ultrasonic flowmeter? The following are the reasons for the inaccurate measurement:
The influence of pipeline parameter equipment on the accuracy of ultrasonic flowmeter measurement.
The influence of upstream and downstream straight pipes on the accuracy of ultrasonic flowmeter measurement.
The influence of couplant on measurement accuracy.
The influence of the installation position of the ultrasonic flowmeter transducer on the measurement accuracy.

Common types of ultrasonic flow meters
①According to the measurement principle. Ultrasonic flowmeters are now the most commonly used methods for measuring flow rates are the propagation velocity difference method ultrasonic flowmeter and the Doppler frequency shift method ultrasonic flowmeter. The propagation velocity difference method can be divided into three types: time difference method, phase difference method and acoustic cycle frequency difference.
②According to the installation method of the transducer. There are two types of ultrasonic flowmeters: fixed ultrasonic flowmeter and portable ultrasonic flowmeter.
The transducer installation methods of the fixed ultrasonic flowmeter can be divided into:
A tube-segment ultrasonic flowmeter integrating transducer and measuring tube;
The external clamp ultrasonic flowmeter with the transducer clamped on the outer wall of the measuring tube;
Insertion Type Ultrasonic Flow Meter in which the transducer passes through the outer wall of the pipe and directly contacts the medium;
The transducer is attached to the inner wall of the large pipeline ultrasonic flowmeter.
③According to the channel of propagation. Ultrasonic flow meters can be divided into single-channel ultrasonic flow meters and multi-channel ultrasonic flow meters. Among them, multi-channel can be divided into two-channel ultrasonic flowmeter, ultrasonic flowmeter, four-channel and eight-channel ultrasonic flowmeter.

The ultrasonic water meter adopts the time difference method to measure the flow. That is to say, an ultrasonic transducer is installed in the upstream and downstream of the measurement channel (pipe section) for mutual transmission and reception of ultrasonic signals.

Because the ultrasonic signal is superimposed with the water flow signal. Make the sound waves travel at different speeds in the forward and reverse flow. Therefore, the ultrasonic signals emitted by different transducers have different running times in water. By measuring the difference in time, the flow rate of the fluid can be calculated. And then converted into flow, so as to achieve flow measurement.

Check more Choosing The Right 1 Inch Flow Meter.

The advantages of ultrasonic flowmeters are:

  1. Ultrasonic flowmeter is a non-contact measuring instrument, which can be used to measure fluid flow and large diameter flow that are not easy to touch and observe. It does not change the flow state of the fluid, produces no pressure loss, and is easy to install.
  2. It can measure the flow of strong corrosive medium and non-conductive medium.
  3. The measurement range of the ultrasonic flowmeter is large, and the diameter of the pipe ranges from 20mm to 5m. 4) The ultrasonic flowmeter can measure the flow of various liquids and sewage.
  4. The volume flow measured by the ultrasonic flowmeter is not affected by the thermophysical parameters such as temperature, pressure, viscosity and density of the measured fluid. Can be made into fixed and portable two forms.

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Sino-Inst, Manufacuturer for Ultrasonic Water Meter for Residential Waters. It can measure a single sound-conducting liquid medium of DN 15—40mm.

Sino-Inst’s Ultrasonic Water Meter for Residential Water, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Strap on flow meter X3

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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.

Sino-Inst offers a variety of  Ultrasonic flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Request a Quote
Ultrasonic Flow Meters

Features of Strap on flow meter X3

  • The flowmeter is stuck outside the pipe, no need to change the pipeline
  • No professional knowledge is required, installation and measurement can be completed according to the operation guide
  • No moving parts, no pressure loss, can be installed and used without stopping production

Details about Strap on flow meter X3

Strap on flow meter X3 is very unique in its structural design. It uses circular magnetic steel to realize automatic engagement during installation. It only takes 2-3 minutes to complete from installation to measurement. It also uses the current popular OLED display, It can be easily read even in insufficient environments.

Strap on flow meter X3 is widely used in flow measurement and monitoring in the production process. The application of the product continuously effectively and accurately controls the flow of the fluid, while improving the yield of the product. It even saves the investment of personnel and brings benefits to the production enterprise.

Strap on flow meter X3 can meet the needs of different pipe materials: stainless steel pipe, carbon steel pipe, copper pipe, plastic pipe (PVC, PPR, PPH, HDPE), 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.

Specifications of Strap on flow meter X3

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
MoeldX3-φ6.35X3-φ9.53 X3-φ12.7X3-φ15X3-φ20X3-φ25
Weight(KG)0.910.910.90.90.840.84
MoeldX3-φ32X3-φ40X3-φ50X3-φ63X3-φ75X3-φ99
Weight(KG)0.820.880.981.431.521.95

Read more about: what is gpm;

What is clamp-on flow meter?

Clamp-on flow meter mainly refers to an ultrasonic external clamp-on flow meter. The ultrasonic sensor is clamped on the pipeline. It can be measured without changing the pipeline.
Clamp-on flow meter can be a handheld host, portable host, etc.

Extended reading: Ultrasonic Insertion Flow Meter for Lined/Large Pipes

How does a clamp-on flow meter work?

Clamp on Ultrasonic Flow Meter adopts the measurement principle of the time difference method. It uses the ultrasonic wave emitted by the sensor to propagate in the flowing fluid. The sound wave propagation speed in the downstream direction will increase, and the backward direction will decrease. In the same propagation distance, there will be different transmission times. According to the difference between the transmission time and the measured The relationship between fluid velocity measures the fluid velocity.

The flow rate of the fluid is different in different positions in the tube. The flow rate in the center of the tube is faster than the flow rate near the wall of the tube. The flow velocity distribution of the fluid in the pipeline can be represented by the flow velocity cross-sectional distribution diagram.

By setting the flowmeter and considering the cross-sectional distribution of the flow velocity, the average flow velocity can be calculated. Then the volume flow of the fluid can be obtained according to the cross-sectional area of the pipe.

Notes:
V measure fluid velocity
M ultrasonic reflection times
D pipe diameter
θ The angle between the ultrasonic signal and the fluid
T up The time when the downstream sensor transmits the signal to the upstream
T down Time from upstream sensor to downstream
ΔT = T up – T down

Extended reading: Magnetic Large Dia. Pipe Flow Meter

More Featured ultrasonic strap on flow meters

Portable Ultrasonic Flow Meter
Handheld Ultrasonic Flow Meter
Clamp on Ultrasonic Flow Meter
Ultrasonic Clamp on Flow Meter

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Sino-Inst, Manufacuturer for ultrasonic Strap on flow meter . It can measure a single sound-conducting liquid medium of Φ9.53 ~ Φ90 . It can measure even liquids such as water, sea water, oil, and slurry.

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

Featured Hydrogen flow meters

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How to choose a Hydrogen flow meter? Hydrogen is a valuable and widely measured industrial gas. Custody transfer metering is a very important feature of hydrogen flow measurement.

Common gas flow meters include thermal mass flow meters, vortex flow meters, precession vortex flow meters, and gas ultrasonic flow meters. How to select a hydrogen flow meter? Next, we will discuss in detail.

Sino-Inst offers a variety of Hydrogen flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Request a Quote
More Flow Meters

Characteristics of hydrogen

Hydrogen (chemical formula H2) consists of two hydrogen atoms, which is colorless, tasteless, odorless, non-toxic, and flammable. With a molecular weight of 2, and a specific gravity of 0.0695, hydrogen is considered the lightest gas, more than 14 times lighter than air (mv=28.8).

Hydrogen is very flammable. Under normal pressure, a mixture with a hydrogen content of 4.0% to 74% can be flammable. Since the minimum ignition energy of hydrogen (0.02mJ—one order of magnitude smaller than the minimum ignition energy of hydrocarbons) is very small, strict precautions must be taken to prevent leakage.

The most preferred hydrogen flow meter

Thermal Mass Flow Meter can directly measure the mass flow of various gases. Unaffected by changes in viscosity, density, temperature, or pressure.

Thermal Mass Flow Meter is a true mass flow meter. No temperature and pressure compensation is required. Thermal gas mass flow meters are designed based on the principle of thermal diffusion. Including natural gas, coal gas, liquefied gas, flare gas, argon, carbon dioxide and other mixed gas flow measurement.

Extended reading: Gas Mass Flow Meter

Mass flow measurement of hydrogen

At present, the Coriolis mass flowmeter and thermal gas mass flowmeter are the most reliable and the most reliable hydrogen flow measurement applications. Both of these are flow meters for direct mass flow measurement, and neither have movable parts and have a large range. The fluid contact surface is made of 316L, which improves the durability and safety of field application.

The sensors of Coriolis mass flowmeter and thermal gas mass flowmeter are all welded. Because the pressure sensor interface and temperature sensor are not required to correct the flow reading to the volume flow under the standard state. Therefore, the system pipe joint used Be reduced to a minimum.

The sensor connection method has flange connection, flange to clamp connection, thermal gas mass flowmeter can also provide large pipeline plug-in connection.

Coriolis mass flowmeters and thermal gas mass flowmeters can provide up to 0.5% accuracy due to their excellent detection technology, which has huge advantages in trade settlement and measurement.

These two types of flow meters have advanced measurement technology, good long-term application stability, and extremely low on-site maintenance costs. They are very popular measuring instruments.

The shortcomings of Coriolis mass flow meters: large pipe diameters are bulky, inconvenient to install, and extremely expensive to purchase. It is inferior to the thermal gas mass flowmeter in the small flow measurement characteristics.

Disadvantages of thermal gas mass flow meters: the high flow rate range is not as good as Coriolis mass flow meters. In order to accurately measure the hydrogen flow rate, it is necessary to use real flow calibration for the flow meter calibration.

Gas Thermal Mass Flow Meter

 Coriolis Flow Meter

Hydrogen flow meter—Precession Vortex Gas Flowmeter

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.

Precession Vortex Gas Flowmeter, like vortex flowmeter, is a velocity flowmeter. The cost performance of the intelligent precession vortex flowmeter is higher than vortex flowmeter. The intelligent precession vortex flowmeter can only measure gas. Precession Vortex Gas Flowmeter can be made into an integrated temperature and pressure compensation. And can measure various gases. Such as compressed air, oxygen, biogas, natural gas, coal gas, etc.

Precession Vortex Gas Flowmeter reference price: DN50, USD 600.00/pc.

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More Featured gas flow meters

A gas flow meter is an instrument for measuring the flow of gas. Installed in the pipeline to record the amount of gas flowing through.

Can measure blast furnace gas, coke oven gas, coal gas, air, nitrogen, acetylene, phosgene, hydrogen, natural gas, nitrogen, liquefied petroleum gas, hydrogen peroxide, flue gas, methane, butane, chlorine, gas, biogas, carbon dioxide , Oxygen, compressed air, argon, toluene, benzene, xylene, hydrogen sulfide, sulfur dioxide, ammonia, etc.

Read more about: Types of biogas flow meters

There are mainly the following types of gas flow meters:

  1. Vortex flowmeter:

It is mainly used for flow measurement of industrial pipeline medium fluid, such as gas, liquid, vapor and other media. Its characteristics are small pressure loss, large measuring range and high accuracy.

When measuring the volume flow under working conditions, it is hardly affected by the fluid density, pressure, temperature, viscosity and other parameters. There are no movable mechanical parts, so the reliability is high and the maintenance is small. The instrument parameters can be stable for a long time.

  1. Gas turbine flowmeter:

The gas turbine flowmeter is a new generation of high-precision and high-reliability gas precision metering instrument developed by itself by absorbing the advanced technology of domestic and foreign flow meters, optimized design, and integrated theories of gas mechanics, fluid mechanics, and electromagnetics.

With excellent low and high pressure metering performance, multiple signal output methods and low sensitivity to fluid disturbances, it is widely applicable to the metering of natural gas, coal-based gas, liquefied gas, light hydrocarbon gas and other gases.

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

  1. Integrated orifice flowmeter:

It is a high-range ratio differential pressure flow device that is composed of a standard orifice plate and a multi-parameter differential pressure transmitter (or a differential pressure transmitter, a temperature transmitter, and a pressure transmitter).

It can measure the flow of gas, steam, liquid and natural gas, and is widely used in process control and measurement in the fields of petroleum, chemical industry, metallurgy, electric power, heating, and water supply.

  1. V cone flowmeter:

V-cone flowmeter is widely used in petrochemical, natural gas and other fields due to its simple structure, firmness, easy duplication, strong versatility, and low price.

This product overcomes the standard orifice plate, venturi tube, nozzle and other throttling devices, such as easy to wear, large pressure loss, small range (range ratio), high on-site installation conditions, and excessively long straight pipe sections. It can accurately measure the flow rate of various fluids in a wide range of Reynolds number.

Guess you like: Gas Mass Flow Meter

Why should you never measure hydrogen and oxygen together with a flow meter?

Because hydrogen is a flammable gas. Oxygen is a necessary condition for combustion. Measure if oxygen and hydrogen are mixed. It is easy to explode.

Therefore, when we choose a hydrogen flowmeter, we must remember to choose an explosion-proof flowmeter!

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Sino-Inst offer over 5 Hydrogen flow meters with Best Price.

A wide variety of Hydrogen flow meters options are available to you, such as free samples, paid samples.

Sino-Inst is Hydrogen flow meters suppliers, located in China. Mass Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Hydrogen flow meters respectively.

Guide for Liquid level float switches

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Liquid level float switch is a commonly used liquid level controller. For water Tank & Pump alarm and level control. Can be divided into Continuous Float Level Sensor and Point Level Float Switch.

Liquid level float switch are sensors with an electrical contact output at a specific liquid level. Floats with permanent magnets. Single or multi point level indicator. Can choose stainless steel or anti-corrosion material. It is suitable for exploratory testing of the limit of liquid in small containers (boxes, barrels, cylinders, etc.).

Sino-Inst offers a variety of Liquid level float switches for level measurement and control. If you have any questions, please contact our sales engineers.

Request a Quote
Float Level Sensors

Featured Liquid level float switches for sale

SI-U05 Cable Float Level Sensor & Swtich
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SI-U01 Float Level Sensor

Know more about Liquid Level Switch

Liquid level switch, also known as water level switch, liquid level sensor. As the name implies, it is a switch used to control the liquid level.

In terms of form, it is mainly divided into contact type and non-contact type.

Commonly used non-contact switches include capacitive liquid level switches, and contact float-type liquid level switches are the most widely used. Electrode liquid level switches, electronic liquid level switches, and capacitive liquid level switches can also be realized by contacting methods.

Continuous Float Level Sensor

The floating ball continuous level gauge uses the floating ball to move up and down with the liquid to trigger or release the reed switch in the tube, and output 4-20mA or other different standard models through circuit processing.

With multi-interface measurement, easy to install, and corrosion-resistant, it can meet most measurement needs. Suitable for various tanks and tank level measurement, optional on-site display.

Point Level Float Switch

The float level switch uses a magnetic float to rise or fall with the liquid level. The sensor detects the reed switch chip at the set position in the tube, and sends out a contact opening (closing) conversion signal.

One or more dry reed pipes are installed in the closed non-magnetic pipe. Then the pipe passes through one or more hollow floats with ring magnets inside. The rise or fall of the liquid will drive the floating ball to move up and down together. Then the reed tube in the non-magnetic tube will pull on or off, and then output a switch signal.

According to needs, one or more liquid level switch points can be set.

Whether it is Continuous Float Level Sensor or Point Level Float Switch, they all need to be in contact with the medium.

However, in some cases, we need to measure and control the liquid level without contacting the medium. Then we can consider the following liquid level sensors.

Extended reading: Magnetostrictive Hydraulic Cylinder Position Sensor

How does a liquid level float switch work ?


Liquid level float switches are liquid level controllers that use one maglev ball or multiple maglev balls to send out multi-point switch signals.
Reed pipes are installed at different heights in the guide rod. When the maglev ball floats up and down as the liquid level changes. The magnetic steel in the floating ball makes the reed pipe at the corresponding position in the guide rod pull on or off, and send out a switch signal.

Read more about: 7 Level Senors for Tank Level Measurement

Explosion proof float switch

The explosion-proof float level switch is also called the explosion-proof float level controller. It is a liquid level control instrument specially designed and manufactured for use in explosive environments. Explosion-proof type ExdⅡBT4; intrinsically safe type ExiaⅡCT6.

Principle of explosion-proof float level switch:

①The mechanical strength conditions of the enclosure. That is, the shell has enough strength to withstand the internal explosion pressure without damage. And it does not produce permanent deformation that affects the explosion-proof performance.

②Control the conditions of non-detonation in the gap of the joint. That is, the shell joint surface has a sufficiently small gap and a sufficiently long engagement length. Explosive products (hot flames or particles) inside will not escape the shell and ignite the explosive mixture in the surrounding environment.

The principle of intrinsically safe explosion-proof technology is to start with limiting energy and reliably limit the voltage and current in the circuit to an allowable range. In order to ensure that the electric spark and thermal effects generated by the instrument in normal operation or short-circuit and component damage, etc., will not cause dangerous gases that may exist around it. It is actually a low-power design technique.

Multi-level float switch

Multi level float switch is also called multi point level switch. Support 1-4 liquid level measurement switch point customization.

Multi level float switch is a custom multi point float level sensor & switch. These versatile level switches are available in many materials. Like: Stainless Steel, Brass & Buna, PVC, Polypropylene or PTFE and can be ordered with an integrated temperature sensor. Use these multi-level float switches with a tank level alarm or liquid level control relay for a turnkey solution. Explosion-proof available.

Vertical liquid level float switch & horizontal liquid level float switch

Vertical liquid level float switch refers to the float level switch installed in the vertical direction. It is usually installed on the top of the tank through flanges or threads. Keep it vertical.

Horizontal liquid level float switch refers to a float level switch installed from the horizontal direction, or from the side.

Float switches for water tanks

In water treatment, the float level switch of the water tank is directly related to the safety and reliability of the entire process.

In a process, there are different types such as intermediate water tank, backwash water tank, produced water tank and waste liquid tank. The sizes of these boxes are different. The volume of the produced water and the original water tank may be larger.

In these water tanks, the water tank float level switch is used for related control. Different liquid level switches will have different actions. However, it is not necessary to have several level switches in a large water tank.

In the water tank, there are high and low level switches. The high level switch can detect if the water tank is full. If it is full, stop producing water. The low level switch is used to detect whether the water in the tank is sufficient. If there is not enough water, no more water can be sent out.

FAQ

What is float level switch?

The float level switch is a kind of level switch. The float level switch uses magnetic force to operate. No mechanical connections. The operation is simple and reliable. When the float switch floats the measured medium, the float moves the main body. At the same time, the magnet on the other end of the float will control the magnet on the switch action lever.

What is a liquid level switch?

Liquid level switch, also known as water level switch, liquid level sensor. As the name implies, it is a switch used to control the liquid level.

How does a float level sensor work?

Float level sensor: Float level sensor is designed and produced based on the principle of buoyancy and static magnetic field. The position of a floating ball with a magnet (floating ball for short) in the measured medium is affected by buoyancy. The change of the liquid level causes the position of the magnetic float to change. The role of the magnet and sensor (reed switch) in the floating ball changes the number of components (such as fixed resistance) connected in series to the circuit. Thereby changing the electrical quantity of the instrument circuit system. That is, changes in the position of the magnetic float cause changes in the electrical quantity. The change of the electrical quantity is detected to reflect the liquid level in the container.
The float level sensor is installed on the top of the container through a connection flange. The float ball floats on the liquid surface according to the principle of discharging the liquid volume phase and so on. When the liquid level of the container changes, the float ball also moves up and down. The reed switch of the ball level gauge is magnetically attracted to change the position of the liquid level into an electrical signal. The actual position of the liquid is displayed digitally by the display instrument. The floating ball level gauge can achieve long-range detection and control of the liquid level.

How do I test a float switch with a MultiMeter?

Turn on the power of the multimeter and set the multimeter to the continuity test position. The test multimeter displays 1, indicating that the test leads are disconnected.
Place the pointer of the multimeter, one wire is gently placed on the wire-in end of the switch terminal, and the other wire is lightly placed on the wire-out end of the switch terminal. If the display is 0, it means that the two terminals are connected to the normal terminal. close.
At this time, we keep the terminal still, slightly press the micro switch, and observe the universal indicator at this time, it becomes 1, which means that the switch is connected to the line, indicating that the micro switch is normal.
In the same way, we test the other two wiring terminals of the micro switch, as shown in the figure:
When no pressure is applied to the micro switch, the display is 1, indicating that the two terminals are normally open.

Sino-Inst offers over 10 Liquid level float switches – Single and Multipoints for level measurement. About 50% of these are float liquid level meters, 40% is the level switches.

A wide variety of Liquid level float switches – Single and Multipoints options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Liquid level float switches – Single and Multipoint instrumentation, located in China.

Hot Water Flow Meters

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Hot Water Flow Meters Improve Heating-Boiler System

Hot water flow meters refer to flow meters that can measure and indicate the flow of high temperature water. Hot water is widely used in industry and civil use. Such as heating systems, baths, boilers, industrial indirect heating, heat transfer, etc. There are many types of water flow meters. Some of the most common types include electromagnetic flow meters, turbine flow meters, and vortex flow meters. These meter types have unique features that distinguish them from each other. According to the function of the hot water flow transmitter and the user’s budget. You can choose a suitable flow meter to monitor the hot water pipeline.

RFQ More Flowmeters

Features of Hot Water Flow Measurement

What are the characteristics of hot water flow measurement? Let’s take a look.

  1. The temperature of the measured fluid is not very high. When the flow meter is installed at the entrance of the heat exchanger body. The temperature of the fluid is generally not higher than 140°C. When the liquid outlet of the heat exchanger is installed, the flow temperature is lower.
  2. The measured fluid pressure is not very good either. In order to send hot water to the highest floor in the building heating system, the pressure is sometimes higher. In the ground heating system, the highest pressure is 1MPa.
  3. The pipe diameters vary in size. The smallest user, the pipe diameter is only DN20~DN40. The large-diameter flowmeter sometimes reaches about 1m.
  4. Better cleanliness. Hot water is not as clean as tap water. The solid matter in the single water and its viscosity will not have a big impact on the general flowmeter.
  5. Corrosive. Fresh water does not corrode the flowmeter. However, geothermal water has a certain degree of corrosion. Because it contains chloride ions and so on. Ordinary stainless steel materials are corroded, and the higher the fluid temperature, the more severe the corrosion.
  6. The requirement for scope is not high. The pumps used in power plants (stations) to deliver hot water are generally combined in size. When the hot water supply is at its maximum, usually several large pumps are opened. When the heat supply is the smallest, generally only a small pump is turned on. The ratio of the maximum flow rate to the minimum flow rate is about 5~10. A flow meter for heat measurement of a single user. In the heating season, the flow measurement range of up to 10 can meet the demand. After the hot water valve is turned off, the market value of the flow should be 0.

Extended Reading: Insertion Flowmeter Types

Hot Water Flow Meter Types

Hot water is the most widely used heat carrier liquid. Due to the difference in use and design, the water supply temperature is commonly used in several grades such as 60℃, 90℃, and 130℃. There are fresh water and geothermal water in the varieties of water. The temperature of geothermal water cannot be determined independently, but it must be above 60°C to have use-value. Flow Meter Selection Guide 101: Find the Perfect Fit for Your Application

Magnetic Water Flow Meter provide highly accurate flow measurements for a wide variety of conductive fluid applications. Magnetic Water Flow Meter is a volumetric flow meter that measures liquids or liquid slurries that have a minimum conductivity of 5 µS/cm.

An electromagnetic flowmeter is an ideal instrument for hot water flow measurement. Its significant advantages are as follows.

  • The pressure loss is negligible. Because the inner diameter of the measuring pipe is the same as that of the pipe.
  • From small to large caliber, the series is complete.
  • The measurement accuracy is high, and the high accuracy can still be achieved when the flow rate is very low.
  • The temperature grade can meet the needs. Among them, the temperature resistance rating of 120°C can meet the measurement needs of most objects. The temperature resistance rating of 180°C can meet the needs of measurement objects with fluid temperatures higher than 120°C.
  • The pressure level can meet the measurement needs. In the electromagnetic flowmeter product sample, the pressure level of the finalized large-caliber electromagnetic flowmeter can only reach 0.6-1MPa. But it can be used as a special order to meet the requirements of objects with higher pressure.
  • Corrosive series products. Geothermal hot water has different corrosive properties due to different production areas. For geothermal hot water containing chloride ions, electromagnetic flowmeters with PTFE lining and titanium electrodes have met the needs.
  • Strong adaptability to the vibration of the pipeline and the environment.
  • It can measure pulsating flow with low pulsating frequency.

Extended reading: 2 inch Water Flow Meter

The turbine flow meter for hot water can measure soft water, soft water and RO water. These are the main water types best suited for turbine flow meters. The maximum hot water temperature of the turbine flowmeter is 150 degrees Celsius.

Turbine flowmeters are based on the principle of torque balance and belong to velocity flow meters. It is widely used in petroleum, chemical, metallurgy, water supply, papermaking and other industries. It is an ideal instrument for flow measurement and energy saving.

  • The function of the turbine flowmeter as a hot water flow meter:
  • High accuracy. Generally up to ±1%R, ±0.5%R, high-precision type up to ±0.2%R;
  • The repeatability is good, and the short-term repeatability can reach 0.05%~0.2%. It is because of the good repeatability, such as frequent calibration or online calibration can get extremely high accuracy. It is the preferred flowmeter in trade settlement;
  • Output pulse frequency signal. Suitable for total measurement and connection with computer. No zero drift, strong anti-interference ability;
  • High frequency signals (3-4kHz) can be obtained. Strong signal resolution;
  • Wide range, medium and large diameters can reach 1:20, and small diameters are 1:10;
  • The structure is compact and light. It is convenient to install and maintain, and has a large circulation capacity;
  • Suitable for high-pressure measurement. No holes are required on the meter body, so it is easy to make a high-pressure meter;
  • There are many types of sensors. Various types of sensors can be designed according to the special needs of users, such as low temperature type, two-way type, downhole type, sand mixing type, etc.;
  • It can be made into a plug-in type, suitable for large-caliber measurement. The pressure loss is small, and the price is low.

Extended Reading: Metal Tube Flow Meter Applications

Use a vortex flowmeter to measure hot water. The pipe diameter of the boiler feed water is below 300mm, which is exactly the pipe diameter range of the full-tube vortex flowmeter.
Different from measuring steam, when measuring hot water, the installation of vortex flowmeter should ensure that the pipe is full and there is no air. The horizontal installation is suitable for the lowest point. When vertical installation, the hot water should flow from bottom to top. Inaccurate.

  • Features of measuring hot water flow with vortex flowmeter:
  • The temperature of the hot water is not very high, and the maximum temperature does not exceed 140 ℃;
  • The cleanliness of hot water is relatively high, and the water does not contain solid matter;
  • The water contains chloride ions, which is corrosive to ordinary steel. And as the water temperature rises, the corrosiveness increases;
  • The maximum pressure of hot water used in the heating system is 1MPa. The pressure used for water is higher, about several megapascals;
  • The pipe diameters vary. The pipe diameter of the boiler water supply pipe is 50~300mm. The pipe diameter of the heating system is quite different. The smallest pipe diameter is 20-40mm, and the largest pipe diameter can reach 1000mm.
  • The flow range ratio is about 5:1~10:1.

The adaptability of ultrasonic flowmeter is incomparable to other types of testing instruments. It has been made into a basic type, high temperature type, explosion-proof type, and wet test type instrument panel with different sound channels to incorporate different substances, different places and different Pipeline standard flow measurement.

Extended reading: non contact flow meter

Ultrasonic flowmeters mainly have the following advantages in practical application:

  • Ultrasonic flow meters are more convenient and faster to install and maintain in practice.
  • The measuring pipe diameter of the ultrasonic flowmeter is relatively large.
  • The measurement reliability of the ultrasonic flowmeter is high.
  • The measurement of ultrasonic flowmeter will not be affected by fluid-related parameters
  • It can be used as a clamp-on ultrasonic flowmeter, which is quick and easy to install and use.
  • It can measure heat and flow at the same time.

Extended reading: Industrial VS Residential inline water flow meters

On the large-diameter pipes of the power plant (station), the orifice plate is still used to measure the flow of water supply and the amount of return water.

Mainly take the following advantages:

  1. The orifice itself has high reliability. The heating will not be interrupted due to the orifice plate.
  2. Convenient verification. The orifice plate only needs to be verified by geometric method. It is not necessary to send the verification center to the standard device for real flow calibration like some flow sensors and transmitters.
  3. When the caliber is large, the investment is relatively low.

Its biggest shortcoming is the large pressure loss, which is not conducive to saving power.

Extended reading: Insertion Ultrasonic Water Flow Meter – Designed for Agricultural Irrigation, Garden Management

Extended Reading: Chilled Water Flow Meter

Hot Water Flow Meter Specifications

Hot water flow meterPipe diameter rangeAmbient temperatureMedium temperatureReference accuracy
Magnetic flow meterDN15~DN3000-25ºC~+60ºC　-25℃~+150℃±1.0%
Turbine flow meterDN4~DN200　-10~+55℃ (-196～80)℃
-20~+80℃;-20~+120℃; -20~+150℃;		　±0.5%, ±1%
Vortex flow meter　DN15~DN300
DN300~DN1000		-35℃～+60℃　Piezoelectric type :-40~150,-40~260,-40~330℃;
Projected Capacitive:-40~400℃ (Consulting supply)		　
±1%
Ultrasonic flow meter　DN15~DN6000-20ºC~+60ºC　-40℃～+160℃　±1% 

Extended reading: Quantitative control with turbine flowmeter

Hot Water Flow Meter with Pulse Output

Commonly used flow meters have three forms: current output, voltage output, and pulse output.

Among them, the current output and the voltage output signal of the instrument are in line with the International Electrotechnical Commission (IEC) standard. There is currently no standard for the pulse output signal of the instrument.

The flowmeter with pulse output, its output is a pulse signal proportional to the flow rate. Compared with the analog signal of voltage and current, the pulse signal is convenient for remote transmission without reducing the accuracy, and there is no zero drift. It is easy to connect with the computer, easy to carry out cumulative display and has a strong anti-interference ability.

Extended reading: Ultrasonic Water Meter for Residential Water

Water Flow Meter Types

There are many types of flow meters for measuring water.

Common ones are V cone flowmeter, electromagnetic flowmeter, metal rotor flowmeter, vortex flowmeter, liquid turbine flowmeter, ultrasonic open channel flowmeter, ultrasonic flowmeter, etc.

At present, electromagnetic flowmeters and turbine/vortex can solve most of the working conditions.

More about:

Digital water flow meters|Water flow meter types

Featured Digital Water Flow Meter

Magnetic Water Flow Meter
Vortex Shedding Flow Meter
In-Line Ultrasonic Flow Meter
Liquid Turbine Flow Meter
Dual Channel Ultrasonic Water Meter
Handheld Ultrasonic Flow Meter
Turbine Insertion Flow Meter
Insertion Magnetic Flow Meter
Turbine Sanitary flow meter
Ultrasonic Clamp on Flow Meter

Extended Reading: Inline Ultrasonic Flow Meter

Hot Water Flow Meter Price

Sino-Inst offers over 30 water flow meter products. About 50% of these are differential pressure flow meters. 40% are water meters (like the Insertion Turbine Flow Meter), and 40% are water treatment (like the Annubar flow meter ).

A wide variety of water flow meter options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of water flow meters, located in China.

The top supplying country is China (Mainland), which supply 100% of the water flow meter respectively.

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.