Coriolis Density Meter-Concentration Meter

Posted on August 30, 2023 by KimGuo11

Coriolis Density Meter is also called Coriolis Concentration Meter. It adopts the principle of operating under the special law of the Coriolis force of the moving liquid. The Coriolis force is related to the density of the liquid, so the density value of the liquid is measured. The concentration is calculated from the density and temperature. The Coriolis principle has high stability, high precision, good long-term stability, and no drift caused by the sensor. Coriolis Density Meter is used in many industries like oil refining, sugar, paper, and chemical. It measures weak acid-base solutions in the wine, salt, and printing industries.

RFQ

Features of Coriolis Density Meter

The 4-wire transmitter with an integrated structure has no moving parts and is easy to maintain; the 4-wire transmitter has 4-20mA output;
Real-time display of five-digit density value, four-digit decimal (one digit for concentration), real-time indication of current and temperature;
You can directly enter the instrument menu to set parameters;
It is easy to install and use, and the reading can be displayed when the flange surface touches the liquid;
It is used for fluid or static liquid, suitable for pipeline installation or installation on container wall, etc.;
Density and concentration have the functions of pure water calibration, fine-tuning of measured value and temperature compensation;
Continuous online measurement without process interruption, can be directly used for production process control;
All parts in contact with liquid are made of 316 stainless steel or polytetrafluoroethylene, which is safe, hygienic and has good corrosion resistance;
Measuring high viscosity and non-Newtonian flow can also measure uniform multiphase flow;

Technical Parameters

Accuracy	±0.001g/cc	±1.0kg/m3
The scope of work	0～3g/cc	0～3000kg/m3	0～187.4 lb/ft3
Repeatability	±0.001g/c	±0.1kg/m3	±0.006lb/ft3
Process temperature effect (corrected)	±0.001%g/cc）	±0.1kg/m3	(per °C)
Process pressure effect (corrected)	can be ignored
(1) The above accuracy is applicable to the calibration range of 0.6-1.25g/cc (600-1250kg/m3) (2) When a long rod is used, the maximum viscosity of the liquid can reach 500CP, but if it is used, the maximum viscosity of the liquid can reach 20000CP. (3) Temperature effect refers to the maximum measurement deviation caused by the process fluid temperature deviating from the factory calibration temperature. (4) Pressure effect is defined as: the change in sensor flow and density due to process pressure deviation from calibration pressure.

Process temperature	–10℃～+60℃
Ambient temperature	–10℃～+85℃
Temperature Coefficient	O.1kg/m3/℃ (after correction)
Built-in temperature sensor	PT100
Wetted parts	Stainless steel 316L, titanium, etc. can be customized
Shell	IP65, aluminum alloy
Tine polishing	Standard, PFA coated or electropolished
Working pressure	3000psi (207bar)
Working pressure	1450psi (100bar)
Test pressure	Tested at 1.5 times the maximum working pressure
Actual maximum working pressure is limited by process connection rating
Process connection type	flange
	Clamp
	thread
Explosion-proof certification	Ex d Ⅱ B T6 Gb
Power requirements	24VDC,50mA
Output	Four-wire system, 4-20mA transmission 4-20mA, optional RS485-Modbus RTU communication
Viscosity range	0-20000CP

Fluid and Material Compatibility

Type	Name	Molecular formula	Concentration (%)	316L	Hastelloy	Titanium alloy	zirconium	PTFE
Acid	Hydrochloric acid (without hydrofluoric acid)	HCI	0-40	×	○	×	☆	☆
	sulfuric acid	H2SO4	0-50	○	☆	○	☆	☆
		H2SO4	50-75	×	○	×	○	☆
		H2SO4	75-98	○	☆	○	○	☆
	nitric acid	HNO3	0-100	○	○	○	○	☆
	phosphoric acid	H3PO4	0-98	×	×	×	×	☆
Alkali	sodium hydroxide	NaOH	0-50	☆	☆	☆	○	☆
	Potassium hydroxide	KOH	0-50	☆	☆	☆	○	☆
	Calcium hydroxide	Ca（OH）2	0-50	☆	☆	☆	○	☆
Salt	Sodium chloride	NaCI	0-50	×	☆	☆	☆	☆
	ammonium chloride	NH4CI	0-50	×	☆	☆	☆	☆
	ammonium sulfate	(NH4)2SO4	0-50	×	☆	☆	☆	☆
Others	carbamide	(NH2)2CO	0-100	☆	☆	○	☆	☆
	sodium hypochlorite	NaOCI	0-16	×	○	×	☆	☆
	hydrogen peroxide	H2O2	0-90	☆	☆	○	☆	☆
☆Recommended ○ Use under specific concentration and temperature limits × Do not use

Featured Types of Coriolis Density Meters-Concentration Meters

Coriolis density meter industrial applications

The Coriolis density meter is based on the principle of special laws under the action of the Coriolis force of the moving liquid. The Coriolis force is related to the density of the liquid, so as to measure the density of the liquid; then according to the relationship between density and concentration The relational table obtains concentration values at a temperature of 20°C.

Coriolis density meter can be widely used in the detection of oil refining and blending in the petrochemical industry. The food industry is used in sugar industry, vegetable oil and beverage processing, etc. Production site, paper industry, measurement of weak acid-base solution in chemical industry, wine industry, salt, printing and dyeing and other industries. Due to the large flow pipe, it is especially suitable for occasions that are not dry or viscous. It is suitable for pipe installation.

Medium limitation		Contain gas	Maximum Liquid Viscosity
Regular liquid	Acid and alkali solution
316L	Titanium	Contain gas Generally do not use	20000CP

Typical application conditions:

Petroleum and petrochemical industry	— Quality Control — Continuous Online
Wine industry	— Quality control — Continuous online inspection
Organic and Inorganic Chemical Materials	— Acid/base concentration control
Pharmaceutical Industry	— Traditional Chinese medicine concentration, alcohol recovery
Battery industry	— Concentration of lithium hydroxide, electrolyte, sulfuric acid solution
Mineral processing	— Clays, carbonates, silicates

Optical Density Meter-Liquid Densitometer

Posted on August 28, 2023 by KimGuo11

Optical Density Meter is a Liquid Densitometer. Using the propagation law of the spectrum in the liquid, sampling is carried out through a high-resolution spectral sensor. The analysis and calculation process is carried out by the software to obtain the regularity of the concentration. Then through temperature compensation, the concentration of various liquids or liquid mixtures can be measured. The Optical Density Meter is suitable for installation in pipes or on vessel walls. It is widely used to measure the density of liquids with certain transparency. Some examples are ammonia water concentration, Brix sugar refining (sugar concentration). Other examples include sodium hydroxide, potassium hydroxide, sodium carbonate, carbamide, ammonia water, and hydrogen peroxide.

RFQ

Features of Optical Density Meter

Fully integrated “plug and play, maintenance-free” digital measurement for monitoring and control;
Provide materials including 316L, PTFE, etc.;
continuous measurement;
No moving parts, less maintenance;
Concentration 4-20mA output;
Provide temperature sensor;
Suitable for a variety of acids, alkalis, organic solutions;
Not easily affected by temperature and flow rate;
Suitable for installation in tanks and pipelines;
A small amount of solids and air bubbles are allowed;
Passed explosion-proof certification;

Technical Parameters

Accuracy	±0.5%
The scope of work	0~100% (20°C), according to the usage, it can be calibrated to a certain range
repeatability	±0.2%
Process temperature effect (corrected)	±0.001% (per ℃)
Process pressure effect (corrected)	can be ignored
Process temperature	–10℃～+60℃
Ambient temperature	–10℃～+45℃
Temperature Coefficient	O.1%/m3/℃ (after correction)
Built-in temperature sensor	temperature chip
Wetted parts	316L, polytetrafluoroethylene
Glass	Acid and alkali resistance
Shell	IP65, aluminum alloy
Working pressure	0.8MPa
Test pressure	Tested at 1.5 times the maximum working pressure
Actual maximum working pressure is limited by process connection rating
Process connection type	flange
Process connection type	Clamp
Explosion-proof certification	Ex d ⅡC T6 Gb
Power requirements	24VDC,50mA
Output	Four-wire system, 4-20mA
Viscosity range	＜5000MPa.s

Fluid and Material Compatibility

Type	Name	Molecular formula	Concentration (%)	316L	Hastelloy	Titanium alloy	zirconium	PTFE
Acid	Hydrochloric acid (without hydrofluoric acid)	HCI	0-40	×	○	×	☆	☆
	sulfuric acid	H2SO4	0-50	○	☆	○	☆	☆
		H2SO4	50-75	×	○	×	○	☆
		H2SO4	75-98	○	☆	○	○	☆
	nitric acid	HNO3	0-100	○	○	○	○	☆
	phosphoric acid	H3PO4	0-98	×	×	×	×	☆
Alkali	sodium hydroxide	NaOH	0-50	☆	☆	☆	○	☆
	Potassium hydroxide	KOH	0-50	☆	☆	☆	○	☆
	Calcium hydroxide	Ca（OH）2	0-50	☆	☆	☆	○	☆
Salt	Sodium chloride	NaCl	0-50	×	☆	☆	☆	☆
	ammonium chloride	NH4Cl	0-50	×	☆	☆	☆	☆
	ammonium sulfate	(NH4)2SO4	0-50	×	☆	☆	☆	☆
Others	carbamide	(NH2)2CO	0-100	☆	☆	○	☆	☆
	sodium hypochlorite	NaOCI	0-16	×	○	×	☆	☆
	hydrogen peroxide	H2O2	0-90	☆	☆	○	☆	☆
☆Recommended ○ Use under specific concentration and temperature limits × Do not use

Working principle of Optical Density Meter

Imagine you have a flashlight. When you shine it through a clear glass of water, almost all the light passes through. But if you shine it through a dark-colored drink, less light will pass through because the drink is denser.

An Optical Density Meter works a bit like that flashlight. It uses light to see how “thick” or “dense” a sample is. Here’s how:

Light Source: The meter has a light that shines through the sample.
Sample: This is what you want to test, like a liquid.
Detector: On the other side of the sample, there’s a part that catches and measures the light that comes through.
If a lot of light passes through, the sample is less dense. If only a little light passes through, the sample is more dense.

The Optical Densitometer is Based on the Propagation Law of the Spectrum in the Liquid. Sampling is Performed by High-Resolution Sensor. Analyzed AN d processed by software. Obtain the Regularity of the Concentration. The then Through Temperature Compensation. various liquids or liquid mixtures.

Medium limit		bubbles, flow rate	Maximum Liquid Viscosity
Particles	transparent
Trace particles	clear, pure liquid	a small amount of bubbles	5000MPa.s
		Velocity > 1.5m/s

Video: https://www.youtube.com/embed/N8DOxmFBrhE

Optical Density Meter Industrial Applications

Imagine factories where they mix and create things like paint, drinks, or even medicine. They need to make sure everything is just right – not too thick, not too thin, and with the right amount of ingredients. That’s where the Optical Density Meter comes in handy.

In the petrochemical industry, it can be widely used in the detection of petroleum, oil refining and oil blending;
In the food industry, it is used in the production sites of grape juice, tomato juice, fructose syrup, vegetable oil and soft drink processing;
dairy industry;
paper industry;
Measurement of alkaline solution;
brewing alcohol;
Printing and dyeing industry: measure ammonia concentration.
Organic and Inorganic Chemical Materials: Sodium Hydroxide.
Measurement of chemical carbamide, detergent, ethylene glycol, acid-base and polymer density.
It can also be used in mining brine, potash, biopharmaceutical and other industries.
Brewing and Beverages: Companies that produce beverages such as fruit juice or beer use this tool to check sugar content. More sugar means the drink may be sweeter and thicker.
Pharmaceutical Manufacturing: When companies manufacture pharmaceuticals, they need to ensure that the mixture is perfect. A gauge can help check this.
Paint making: Have you ever noticed that some paints are thick and some are thin? The factory uses a densitometer to get just the right consistency.
Water Treatment: This meter can help check how clean the water is. If the water is too “thick” and contains unwanted material, more cleaning may be required.
Agriculture: Farmers use it to check the health of plants. If plants are not healthy, they may not be able to absorb enough light. Meters can provide relevant clues.

These are just a few examples. There are many places where knowing how “thick” or “dense” something is can be very useful, and that’s why the Optical Density Meter is an important tool in industries.

Typical applications:

Denitrification industry	— Measure ammonia concentration (0~30%)
Wine industry	— Quality control — Continuous online inspection
Organic and Inorganic Chemical Materials	— Acid/base concentration control
Pharmaceutical Industry	— Traditional Chinese medicine concentration, alcohol recovery
Battery industry	— concentration of lithium hydroxide, electrolyte, sulfuric acid solution
Mineral processing	Clay, carbonate, silicate

FAQ

A densitometer measures how “thick” or “dense” something is, like a liquid or a film. It helps in making sure things are the right consistency.

This is a special tool that checks how much light can pass through something, like a liquid. If less light passes through, it means the liquid is denser.

Both measure how “dense” something is, but in different ways. A density meter usually measures the weight of a liquid, while a densitometer measures things like how light passes through.

Optical density is measured by shining a light through something (like a liquid) and seeing how much light comes out on the other side. The less light that comes out, the higher the optical density.

They’re closely related! Absorbance is about how much light is “soaked up” by something. OD, or Optical Density, is about how much light passes through. So, if something has high absorbance, it’ll have a high OD too.

This method is used in labs and industries to find out how dense a liquid is by checking how much light can pass through it. It helps in making drinks, medicines, and studying cells, among other things.

It’s a way to describe how much light can go through something. If a liquid doesn’t let much light through, it has a high optical density. If it lets a lot of light through, it has a low optical density.

Handheld Density Meter-Portable Micro Vibrator Digital Density Meter for Petroleum Products

Posted on August 26, 2023 by KimGuo11

Handheld Density Meter is a portable device used to measure the temperature and density of liquids in tanks. Our Handheld Density Meter is a portable micro-vibrating cylinder digital density meter. It is mainly used to measure the concentration of petroleum products online. Of course, it is also possible to measure the concentration of concentrated ammonium sulfate, etc.

RFQ

Micro Vibrator Handheld Density Meter Features:

Portable micro-vibrator digital density meter, also known as Handheld Density Meter, adopts portable and hand-held design. Used to measure the temperature and density (concentration) of liquids in tanks. After the measurement is completed, the data will be displayed automatically. Portable design, easy to operate and easy to carry.

Handheld density meter with digital LCD screen and various display contents.
Wide measurement range, simple operation, high measurement accuracy and fast test speed.
The pure water density meter is easy to calibrate, and standard substance calibration can be performed.
The sample demand is small, only about 100ml liquid is needed

Technical Parameters:

Density range: 0~2g/ml(g/cm3)
Density accuracy: 0.003 g/ml ,
Resolution: 0.0001,
Repeatability: 0.0005
Medium temperature: 0~100℃ (liquid fluidity)
Ambient temperature: -40~85℃
Temperature Compensation: Automatic
Material of internal parts placed in the liquid: stainless steel 316L, ceramics, zirconia, etc.
Tine Polish: Standard, PFA Coated or Electropolished

Working Principle

The sensor of the Micro Vibrator Handheld Density Meter is designed according to the principle of component vibration. This vibrating element is similar to a two-toothed tuning fork, the body of which is vibrated by a piezoelectric crystal located at the root of the tooth. The frequency of the motion is detected by another piezoelectric crystal. Through phase shifting and amplification circuit, the fork body is stabilized on the natural resonant frequency. When the medium flows through the fork, the resonance frequency changes due to the change of the medium quality.

Working principle:
The density and vibration frequency of the medium conform to the following mathematical formula: D=K0+K1T+K2T2

Formula:
D = Density of the measured medium
T = natural frequency of the fork
T2=The frequency when the measured medium flows through the fork body

K0, K1, K2=constant According to this formula, the accurate medium density value can be calculated through the electronic processing unit.

Technical Advantages

Tuning fork vibrating density meter with microprocessor-based electronic switching unit combining signal processing, calculation and diagnostic functions.

In addition to convincing measurement accuracy and reliability. While measuring density and temperature, parameters such as basic density, °API, Brix, concentration percentage, mass percentage, volume percentage, and specific gravity can also be calculated.

Handheld Density Meter Applications

The Micro Vibrator Handheld Density Meter is a versatile instrument crucial for several industries. It works by using tiny vibrations to measure the density of fluids.

Key Industries:

Petroleum and Chemical: Monitoring the quality of fuel and other chemical products.
Brewing: Ensuring the consistency and quality of alcoholic beverages.
Food Production: Checking the density of ingredients and final products for quality control.
Pharmaceuticals: Ensuring drug formulations are consistent and up to standards.
Mineral Processing: Used in the assessment of clays, carbonates, silicates, and more.

Applications:

Detecting the interface in multi-product pipelines.
Checking the density of mixed fluids.
Monitoring reaction endpoints in reaction kettles.
Interface detection in separators.

Case Examples: Handheld density meter for petroleum products

Oil Pipeline Interface Detection:

Scenario: When transporting different types of oil in a single pipeline, it’s crucial to detect when one type ends and another begins.
Use of Portable Density Meter: The meter helps in accurate detection, preventing mixing and ensuring product purity.
Parameters: Crude oil density: around 0.8 to 0.93 g/cm³; Diesel density: 0.8 to 0.85 g/cm³.

Fuel Quality Assurance at Refineries:

Scenario: A major refinery needs to regularly check the quality of its gasoline.
Use of Handheld Density Meter: By using the meter, technicians can instantly measure the density at various stages of production.
Parameters: Desired density range: 0.725 to 0.775 g/cm³.

Lubricant Production Quality Control:

Scenario: A factory produces motor lubricants and wants to maintain a consistent product.
Use of Portable Density Meter: By regularly checking the density, they can ensure the lubricant has the right balance of additives and base oil.
Parameters: Desired density range: 0.85 to 0.89 g/cm³.

So, you should know that the Micro Vibrator Handheld Density Meter is an important tool, especially in the field of petroleum products.

By ensuring accurate and consistent measurements, it’s an invaluable tool for quality and process control.

More Digital Density Meters and Detecting Instruments

**Online Density Meter – Differential Pressure Type**

**Optical Density Meter-Liquid Densitometer**

**Coriolis Density Meter-Concentration Meter**

**Online Alcohol Density Meter-Alcohol Concentration Meter**

**Split Type Density Meter for Liquids**

FAQ

A density meter for fuel oil is a tool that measures how compact or dense the fuel oil is.

A density meter or a hydrometer is used to measure the density of oil.

A portable density meter is used to quickly check the density of liquids on-the-go, without needing a big machine.

The DMA35 is a specific type of portable density meter, mainly used for quick measurements in the field.

A hydrometer is a manual tool that floats in a liquid to measure its density. A digital density meter gives electronic readings, which can be more accurate and faster.

A density meter measures the compactness of liquids. A densitometer usually checks the darkness or lightness of materials, like photographic films.

The primary instruments for measuring density are the density meter and the hydrometer.

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The Handheld Density Meter, Micro Vibrator Digital Density Meter for Petroleum Products, is a game-changer in the industry. Whether it’s for quality control in refineries, detecting oil types in pipelines, or ensuring consistent lubricants, this tool is essential. Quick, accurate, and user-friendly, it plays a pivotal role in maintaining the highest standards in petroleum-related operations.

If you’re in need of such a tool or have specific requirements, look no further! We, at Sino-Inst, pride ourselves on being experienced manufacturers and suppliers in this field. Our rich expertise ensures that you receive the best product tailored to your needs. Interested in custom solutions? We’ve got you covered. Reach out today, and let’s enhance your petroleum processes together. Contact Sino-Inst now!

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Case: High Temperature Radar Level Transmitter for Melted Salt-Solar Photovoltaic Power Station

Posted on August 23, 2023 by KimGuo11

Melted salt tanks, also known as molten salt troughs, serve the primary purpose of storing high-temperature liquid molten salt. Within these systems, the tanks store heat energy to provide the necessary thermal energy for reactors or heat exchangers or store excess energy. Given the extreme temperature and conditions within these tanks, there’s a need for reliable level measurement technology.

RFQ

Melted salt, reaching temperatures of around 460°C, creates a complex tank environment, especially when mixed with steam. Most level transmitters fail to operate under these harsh conditions.

Challenges of Measuring Melted Salt Levels:

High Temperatures: Melted salt can reach up to 460°C, making it hard for standard devices to operate reliably.
Steam Interference: The presence of steam in the tank creates a complex environment, which can interfere with measurement signals.
Tank Conditions: The frequent temperature fluctuations and regular start-ups can affect the accuracy of level measurements.
Material Properties: The molten state of salt presents a challenge, different from measuring solid or regular liquid states.
Equipment Durability: Many devices aren’t built to withstand the extreme conditions inside a melted salt tank over extended periods.
Accuracy: Precise measurements are crucial, but many transmitters can’t maintain consistent accuracy under these conditions.
Safety Concerns: Due to the high temperatures and nature of melted salt, there’s a heightened need for safe measurement methods.
External Factors: Outside atmospheric conditions, like pressure and humidity, can also influence measurement reliability.

In such a demanding setting, it’s vital to have equipment specially designed to overcome these challenges, ensuring safe and accurate level measurements.

Sino-Inst’s Solution:

After extensive site inspections and numerous tests, Sino-Inst introduced a customized high-temperature radar level transmitter. This new device can measure liquid levels in temperatures from 300°C to over 1000°C, even in tough environments. It’s a big advancement in level measurement technology.

Working Conditions and Environment:

Ambient temperature range: -35℃ to 80℃
Relative humidity: ≤95%
Atmospheric pressure: 86～108KPa
Medium temperature: 400-595℃
Medium: Molten Salt

Performance Indicators:

Measurement accuracy within the full range: <±0.1%, display resolution: ±1mm
Protection level of the transmitter: IP67
Response time under 200ms, tracking rapid changes in tank levels.
Resistant to design pressure 1.5 times during a water pressure test.

Considering the environmental and working conditions of the solar molten salt tower-type thermal power molten salt tank, Sino-Inst selected the best products for precise, stable measurements. The 80G high-frequency high-temperature radar level gauge was chosen with specific features:

Enhanced with a cooling system and heat dissipator to ensure stable operation.
Equipped with a convex lens to prevent adhesion, ensuring measurement accuracy.
Radial measures that are narrow, facilitating easy installation and stability.

Key Advantages:

Unaffected by atmospheric precipitation
Measures boiling liquid levels
Installation outside storage tanks
Internal antenna with fluoroplastic lens heating protection
Accurate level measurement not limited by internal temperatures
Evaporation and dust don’t affect measurement
Operates in ambient temperatures from -60°C to 70°C and process temperatures up to 1200°C
Corrosive liquid level measurement without contact, ensuring stable measurements.

Technical Principle:

The radar level transmitter operates on the principle of time travel. It emits high-frequency pulses at the speed of light, which, upon striking the surface of the material, are reflected back and received by an internal receiver. This distance signal is then converted into a level signal.

Radar Level Measurement and guide wave radar level measurement Image source: https://instrumentationtools.com/radar-level-measurement/

Applications:

Solid measurements including powders, granules, and plastic granules with a low dielectric constant.
Liquid measurements, including reactor levels, steam levels, foam product levels, and more.

More Featured Radar Level Meters

**Radar Water Level Sensor 0.05m～35m ~70m~120m**

**SIRD-901 Radar Corrosive Liquid Chemical Level Sensor**

**SIRD-903 26 GHz Radar level Sensor -Dust solid level measurement**

**SIRD-805 Radar Slurry Tank Level Sensor**

**SIRD-806 Radar High Temperature Level Sensor**

SIRD-703 GWR Bulk Solids & Powder Solid Level Sensor

SIRD-704 Coaxial Probe Guided Wave Radar Level Transmitter

Portable Density Meter-Portable Tuning Fork Density Meter

Posted on August 21, 2023 by KimGuo11

Portable Density Meter is used to measure the density or concentration of liquid media in tanks and pipes. Also called Portable Tuning Fork Density Meter or handheld density meter. Different from the structure of Anton Paar DMA35 Portable Density Meter, our Portable Density Meter is equipped with a handheld host and a submersible probe. It can meet various measurement requirements of users for density, concentration and solid content.

RFQ

Features of Portable Density Meter

Used to measure the temperature and density (concentration) of liquids in tanks. The data will be displayed automatically after the measurement is completed.
Portable design, easy to operate and easy to carry.
Wide measurement range, suitable for continuous and uninterrupted measurement. The measurement accuracy is high and the test speed is fast.
Low maintenance, no moving parts, high durability.
Built-in temperature sensor to monitor the temperature of the liquid to be tested at all times.
Provide customization including 316L, titanium and other materials
Support the calculation of density and standard concentration
Automatically provide temperature compensation, with automatic calibration function

Technical Parameters

Power supply: Built-in 3.7VDC lithium battery with rechargeable battery;
Concentration range: 0~100% (20°C), according to the usage, it can be calibrated to a certain range;
Density range: 0~2g/ml, according to the usage, it can be calibrated to a certain range;
Concentration accuracy: 0.5%, resolution: 0.1%, repeatability: 0.2%;
Density accuracy: 0.003 g/mL , resolution: 0.0001, repeatability: 0.0005;
Medium temperature: 0~60°C (liquid state) Environment degree: -40~85°C;
Medium viscosity: <2000mpa·s;
Response speed: 2S

Physical Iindicators

Interface material: stainless steel
Cable material: anti-corrosion silicone rubber
Wetted parts: 316 stainless steel, special requirements are available

Product Performance

The accuracy	±0.003g/cm3	±3.0kg/m3
Working scope	0至3g/cc	0至3000kg/m3
Repeatability	±0.001g/cc	±1kg/m3
Process temperature effect (corrected)	±0.0005g/cm3	±0.5kg/m3

Temperature Specification

Process temperature	–20°C +100°C
Ambient temperature	–20℃ +85℃
Temperature Coefficient	0.1kg/m3/°C (after calibration)
Built-in temperature sensor	PT100

Structural Materials

Wetted Parts: Stainless Steel 316L, Hastelloy, Zirconium
Tine Polish: Standard

Liquid Viscosity Range

Viscosity requirement: < 1000MPa

Liquid and Material Compatibility

Type	Name	molecular formula	Concentration (%)	316L	Hastelloy	Zirconium
Acid	Hydrochloric acid (without hydrofluoric acid)	HCI	0-40	×	○	☆
	sulfuric acid	H2SO4	0-50	○	○	☆
		H2SO4	50-75	×	○	○
		H2SO4	75-98	○	○	○
	nitric acid	NHO3	0-100	○	○	☆
	phosphoric acid	H3PO4	0-98	○	☆	×
Alkali	sodium hydroxide	NaOH	0-100	○	☆	×
	Potassium hydroxide	KOH	0-50	○	☆	☆
	Calcium hydroxide	Ca（OH）2	0-50	○	☆	○
Others	carbamide	(NH2)2CO	0-100	☆	☆	☆
	sodium hypochlorite	NaOCI	0-16	○	○	×
	hydrogen peroxide	H2O2	0-90	☆	☆	×
☆ Recommended O Use under specific concentration and temperature limits X Do not used

Dimensions

Portable Tuning Fork Density Meter working principle

The tuning fork density/concentration meter is used to measure the density or concentration of liquid media. Density or concentration measurement is an important process control in the product manufacturing process.

Tuning fork densitometers can be used as indicators for other quality control parameters such as solids content or concentration values. It can meet various measurement requirements of users for density, concentration and solid content.

A tuning fork portable density meter that uses an acoustic frequency signal source to excite the metal fork. And make the fork vibrate freely at the center frequency. This frequency correlates with the density of the contacting liquid. Therefore, the density of the liquid can be measured by analyzing the frequency, and then the temperature compensation can eliminate the temperature drift of the system.

As for the concentration, the concentration value at a temperature of 20°C can be calculated according to the relationship between the corresponding liquid density and concentration.

This device integrates density, concentration and Baume into one. And has a variety of liquids to choose from.

Particle limit		Gas	Maximum Liquid Viscosity
Particle diameter	Suspended particles%
<10 microns	＜=40%	Generally do not use	＜1000cp
10~50 microns	＜=20%

Applications

Portable density meters have a wide range of industrial applications across different sectors, including the petrochemical, brewing, food, pharmaceutical, mineral processing, oil, chemical, food and beverage, battery and electrolyte, ammonia preparation, laboratory, and desulfurization industries. They are specifically used for interface detection in multi-product pipelines, density detection of stirred mixtures, end point monitoring of reactors, and interface detection of separators.

Some specific examples of their use include:

In the petrochemical industry, portable density meters are used to detect interfaces in multi-product pipelines and to monitor the density of fuel blends.
In the food industry, portable density meters are used to monitor the density of food products during production, ensuring consistent quality.
In the pharmaceutical industry, portable density meters are used to measure the density of different materials during drug formulation.
In the battery and electrolyte industry, portable density meters are used to measure the density of electrolyte solutions, which is important for battery performance.

Overall, portable density meters are a versatile tool for a wide range of industries, helping to ensure consistent quality and optimize production processes.

More Digital Density Meters

**Handheld Density Meter- Digital Density Meter for Petroleum Products**

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Portable Density Meter is used to measure the density or concentration of liquid media in tanks and pipes. After the measurement is completed, the data will be displayed automatically. Portable design, easy to operate and easy to carry.

Density or concentration measurement is an important process control in the product manufacturing process. Our Portable Density Meter – Portable Tuning Fork Density Meter can be used as an indicator of other quality control parameters like solids content or concentration values. It can meet various measurement requirements of users for density, concentration and solid content.

We, Sino-Inst, are a professional density meter manufacturer. We manufacture and supply Portable Density Meter, Online Tuning Fork Density Meter, Differential Pressure Density Meter, Split Density Meter, Coriolis Density Meter, etc.

If you need to monitor density or concentration, please feel free to contact Sino-Inst sales engineers.

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KimGuo11

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What Is Density Meter? and Types

Posted on August 19, 2023 by KimGuo11

What Is Density Meter?

Density meters are instruments that measure the density of a sample liquid or gas. The density meter is also known as an online liquid density transmitter. It can also be called a densitometer, density sensor, density analyzer, or inline hydrometer.

The industrial density meter is used to monitor and control the concentration and density of liquids or gases in production. This instrument is reliable and easy to use. It generates a 4-20mA or RS485 signal. The signal can be calibrated and monitored remotely.

RFQ

Types of Density Meters

How to classify and select industrial density meters?

There are five different kinds of densitometers: tuning fork, Coriolis, differential pressure, radioisotopic, and ultrasonic. Here’s a brief introduction.

1. Tuning fork density meter

The sensor is designed according to the principle of vibration. This vibrating element resembles a two-toothed tuning fork. The fork is vibrated by a piezoelectric crystal located at the root of the tooth. The frequency of the vibration is detected by another piezoelectric crystal. Through phase shifting and amplification circuits. The fork is stabilized at the natural resonant frequency. The liquid flowing through the fork causes the vibration to change. This change in vibration alters the resonant frequency. The electronic processing unit calculates the accurate density value.

Advantages:

Simple installation, plug and play, maintenance-free. The density of mixed media containing solids or air bubbles can be measured.

Disadvantages:

The density meter is not ideal for measuring crystallization and fouling media.

Typical application:

Petrochemical industry, food and wine industry, pharmaceutical industry, organic and inorganic chemical industry and mineral processing (such as clay, carbonate, silicate, etc.).

This is mainly used to detect interfaces in pipelines and control concentrations in various industries. This tool is used in brewing to measure wort concentration and in controlling acid-base concentrations. It is also used to refine sugar and detect the density of stirred mixtures. Reactor end point detection, separator interface detection, etc.

2. Coriolis online density meter

Working principle:

The measuring tube vibrates continuously at a certain resonant frequency. The vibration frequency changes with the density of the fluid. Therefore, the resonant frequency is a function of the fluid density. The density of the fluid can be accurately obtained by measuring the resonant frequency. The density measurement can also directly measure the fluid’s mass flow rate in the closed pipeline. This is done using the principle of Coriolis force.

Advantages:

The mass flowmeter can measure mass flow, density and temperature at the same time. Moreover, the measurement accuracy is high and the operation is stable. Therefore, it is widely used in the flow and density detection and control of the production process in the petrochemical field.

Disadvantages:

The price is relatively high, and it is easy to wear and block when used to measure granular media.

Typical application:

This device has many uses. In the petrochemical industry, it can detect oil levels and interfaces. In the food industry, it can be used for processing grape juice, tomato juice, and more. It also has applications in the dairy and paper industries. Additionally, it can test various chemical substances. It can also be used in mining brine, potash, natural gas, lubricating oil, biopharmaceutical and other industries.

3. Differential pressure density meter

Measuring principle:

The differential pressure density meter is the gravity difference △P=ρgh generated by the liquid column. When h remains constant, the differential pressure value measured by the transmitter is divided by gravity and length to find the density.

Advantages:

The differential pressure density meter is a simple, practical and cost-effective product.

Disadvantages:

This product has some drawbacks. It needs to be installed vertically, has a large margin of error, and the measurements it provides can be unstable.

Typical application:

The sugar industry and the winemaking industry both produce different types of liquids. These liquids include fruit juice, syrup, and grape juice. They also produce alcohol with different strengths, such as ethane and ethanol.

Dairy industry: condensed milk, lactose, cheese, dry cheese, lactic acid, etc.;

Mining: coal, potash, brine, phosphate, the compound, limestone, copper, etc.;

Oil refining: lubricating oil, fragrance, fuel oil, vegetable oil, etc.;

Food processing: tomato juice, fruit juice, vegetable oil, starch milk, jam, etc.;

Pulp and paper industry: black pulp, green pulp, pulp cleaning, evaporator, white pulp, caustic alkali, etc.;

Chemical industry: acid, caustic soda, carbamide, detergent, polymer density, ethylene glycol, sodium chloride, sodium hydroxide, etc.;

Petrochemical: natural gas, oil and gas washing, kerosene, lubricating oil, oil/water interface.

4. Radioactive isotope density meter

Working principle:

The instrument of the radioisotope density meter is equipped with a radioisotope radiation source. The radiation detector detects the radioactive radiation, like gamma rays. It receives the radiation after passing through the measured medium. When the thickness of the medium is constant, the attenuation of rays is only a function of the material density of the medium. The density value can be obtained through the calculation inside the meter.

Advantages:

The radioactive densitometer can measure the material’s density and other parameters inside the container. It doesn’t need to touch the object being detected. This is especially useful in harsh conditions like high temperature, high pressure, corrosion, and toxicity.

Disadvantages:

The pipeline’s inner wall gets worn and scaled, leading to measurement errors, difficult approvals, and strict management.

Typical application:

This device is commonly used in various industries like petrochemical, steel, and mining. It measures the density of liquids, solids, and substances like coal powder and cement slurry. This device is good for online use in industrial and mining companies. It is especially useful for measuring density in tough, hard, corrosive, hot, and high-pressure conditions.

5. Ultrasonic density (concentration) meter

Working principle:

Ultrasonic density (concentration) meter is based on the transmission speed of ultrasonic waves in liquid to measure the density of liquid.

Theory and experiments have shown that the speed of ultrasonic waves in a liquid depends on its concentration and temperature. Changing the concentration of the liquid will cause the speed of the waves to change as well.

The speed of ultrasonic waves in liquid depends on its elasticity and density. Therefore, changes in the transmission speed at a specific temperature indicate changes in concentration or density.

In this way, when the ultrasonic sensing unit of the meter gives an ultrasonic signal and measures its transmission speed in the process liquid and the current temperature of the liquid, the meter can accurately calculate the concentration, temperature, speed and other related data. The current concentration or density value.

Advantages:

Ultrasonic testing is not affected by the color, dirtiness, or flow of the medium.

Disadvantages:

The price of this product is relatively high, and the measurement is greatly affected by air bubbles. There are also limitations of its own circuit and environmental interference on the industrial site. The accuracy of this product needs to be improved.

Typical applications:

Industries such as chemical, petrochemical, textile, semiconductor, steel, food, beverage, pharmaceutical, winery, paper, and environmental protection. This sentence is quite long and complex, making it difficult to understand. Let’s break it down into shorter, simpler sentences while still conveying the same meaning and details.

The main purpose is to measure the concentration or density of different substances. These substances include acid-base salts, chemical raw materials, various oil products, fruit juice, syrup, beverages, and wort.

Also, it measures different wines, materials for making wine, things added to wine, oil products, changing how materials are moved, separating oil and water, and monitoring different material parts.

Featured Density Meters

**Portable Density Meter-Portable Tuning Fork Density Meter**

How to Select the Right Density Meter?

How to choose the right density meter? Based on our Sino-Inst’s many years of experience in density measurement. We have sorted out the selection considerations for industrial density meters. Selecting the right density meter requires consideration of the following factors:

1. Measuring medium: What are you measuring? Liquids, gases, or both? Sludge, sediment? Make sure to choose a density meter that is compatible with your sample type.

2. Measuring range: Determine the density range of the substance you need to measure. Different densitometers have different measuring ranges. Make sure to choose an instrument that covers the range you need.

3. Measurement accuracy: Select a density meter according to your accuracy requirements for density measurement. Certain applications need very accurate density measurements, while others can tolerate less accuracy.

4. Use environment: Consider the environment in which you will use the density meter. If you need to measure in harsh conditions. Such as high temperature or high pressure environment, you need to choose a density meter that can work well under these conditions.

5. Functions and characteristics: Density meters may have different functions and characteristics. Choose the functions and features that suit you. Consider things like automatic temperature compensation and data logging and storage.

6. Budget: Finally, consider your budget constraints. Density meters come in a wide range of prices. Choose a cost-effective and reliable density meter according to your budget.

To choose a density meter, refer to the manufacturer’s product specifications and technical parameters. This can help you make more informed decisions and find the right density meter for your needs.

FAQ

Density meters help figure out how thick or thin a substance is. Industries like food, medicine, and fuel use them to make sure their products are top-notch and safe.

Think of a densimeter as a special scale. It checks how much space a sample takes up and uses that info to tell its density.

It’s often referred to as a “densimeter.” Both names mean the same thing and point to a tool that measures density.

In simple terms, the theory is about measuring how much a certain amount of substance weighs and then figuring out how tightly packed its particles are. This helps determine if the substance is dense (thick) or not dense (thin).

Online Density Meter – Differential Pressure Type

Posted on August 17, 2023 by KimGuo11

Online Density Meter, also known as online density transmitter. An online density meter (also known as an online density transmitter) is a device that continuously measures the concentration and density of a liquid online. The Intelligent Online Density Meter calculates density using differential pressure. To do this, it measures the pressure at a certain height and adjusts for temperature. This meter is highly accurate, reliable, and easy to install and use. The Online Density Meter has two wires and creates a 4-20mA signal from concentration and density. It can be calibrated and monitored remotely through digital communication.

RFQ

Features of Online Density Meters

This online density meter works with liquid that is moving or still, and can be installed in pipelines or tanks.
The two-wire transmitter with an integrated structure has no moving parts and is easy to maintain.
Continuous online measurement of liquid density and temperature without process interruption. It can be directly used for production process control.
Dual four-digit LCD display.
Can see temperature and density together, which helps with converting density for industry standards.
The density meter has several different wetted materials.
It is easy to install and use, and the reading can be displayed after inserting the liquid.
Simplified maintenance, no need for regular cleaning.
Calibrating an online density meter is easy. You don’t need a reference source or lab calibration. Plus, it won’t interrupt the process.
Intrinsically safe type can be used in dangerous sites.
The hygienic density meter can be used in the food industry for measuring liquids and soft drinks at different production sites.
The anti-corrosion density meter measures acid and alkali solutions, chemical carbamide, detergent, and more.
In high temperature working conditions of 100°C~150°C, there are special specifications like high temperature and horizontal pipe. These specifications are designed for the site environment.

Technical Parameters

Measuring range:	0.000– 3.000 g/cm3 (0000–3000kg/m3) (users can freely choose the measurement range)
Calibration range:	0.500– 3.000 g/cm3 (500–3000kg/m3) (calibrated according to the measurement range selected by the user)
measurement accuracy:	±0.01g/cm3, ±0.005 g/cm3, ±0.002g/cm3 (users can choose the applicable accuracy)
Repeatability:	± 0.0005 g/cm3 (± 0.5kg/m3)
Operating temperature range:	-50°C~+250°C (different medium temperature is optional, divided into low temperature, normal temperature, high temperature type)
Work pressure:	7.0MPa
Fluid Viscosity Range:	0–20000cP
Temperature Coefficient:	Less than 0.1kg/m3/℃ (after correction)
Pressure effects:	negligible
Built-in temperature sensor:	PT1000
Wetted material:	316L, Hastelloy C-276, Tantalum, Titanium, PTFE (Teflon)
Power supply:	24VDC, ≥50mA
Intelligent signal output:	4-20Ma, RS485ModbusRTU
Display method:	High-definition backlight LCD liquid crystal meter display
Output accuracy (20°C):	±0.5% of reading or ±0.2%FS
Output repeatability (-40 ~+85°C):	±0.1%FS
Process connection:	Thread type, flange type, hygienic type (dimensions can be customized according to the site or user’s own requirements)
Shell:	aluminum alloy
Protection class:	IP67
Explosion-proof grade:	EXdⅡCT6
Temperature:	-30~150℃ (optional)

Pipe Density Meter

The product must be installed vertically (that is, the pipeline must run straight);
The verticality to the ground is not greater than 5 degrees (if the installation is not vertical, or when the local gravity acceleration deviates from the standard gravity acceleration, a deviation will occur, and how to eliminate the resulting deviation will be introduced later).
The straight pipe section at both ends of the flange is not less than 3 times the diameter of the pipe.
The medium in the pipeline must be full without air bubbles.

Insertion Density Meter

The product must be inserted and installed vertically at the top. The verticality to the ground is not more than 5 degrees (if the installation is not vertical, or when the local gravity acceleration deviates from the standard gravity acceleration, a deviation will occur, and how to eliminate the resulting deviation will be introduced later).
When installing on the side, the straight pipe section of the flange must be installed smoothly.

Side Mounted Differential Pressure Density Meter

When measuring fluids in horizontal tanks or vessels, side-mounted instruments can provide more accurate readings.
Side mounting might be easier in scenarios where top or bottom access to the tank is restricted or complicated.
For fluids with high viscosity, having a side-mounted device can help in getting a more consistent and stable reading.
If the fluid is aggressive or corrosive, a side-mounted device might be preferred to minimize exposure and risk.
It’s mounted on the side of a container or pipeline.

PTFE spray coating – acid and alkali corrosion resistance

Careful selection: high spraying requirements and easy bump damage

The two-wire transmitter with an integrated structure has no moving parts and is easy to maintain and easy to install and use.
Insert the liquid to display the reading for fluid or static liquid.
It is suitable for installation of pipes and radiant bodies. The two parameters of temperature and density can be displayed alternately, which is convenient for industry standard density conversion.

Full PTFE package – (tetrafluoro) super corrosion resistance

Continuous online measurement of liquid density without process interruption, can be directly used in the production process to control the liquid parts are all made of stainless steel materials with several media, safe and hygienic
Installed in food production site

Application field of online density meter

Sugar industry and wine industry
Squeeze fruit juice, syrup, grape juice, lime juice density, alcohol GL, molasses, hexane/ethanol interface, etc.
Dairy industry
Condensed milk, lactose, cheese, dried cheese, lactic acid, etc.
Mining
Coal, potash, brine, phosphate, calcium compounds, limestone, copper, gold, etc.
Refining
Lubricating oil, fragrance, fuel oil, vegetable oil, etc.
Food processing
Tomato juice, grape juice, lemon juice, tomato paste, molasses, vegetable oil, fructose syrup, jelly, jam, etc.
Pulp and paper industry
Black pulp, green pulp, pulp cleaning, evaporator, caustic alkali, etc.
Beverage processing
Beer, soft drink, fruit wine, instant coffee, malt, etc.
Chemical industry
Caustic soda, acid, carbamide, detergent, polymer density, glycol, sodium chloride, sodium hydroxide, etc.
Petrochemical
Natural gas, oil and gas washing, kerosene, lubricating oil, oil/water interface, etc.

online density transmitter working principle

The density of liquids cannot be measured directly.

In industry, density meters are categorized based on the principle they use, like float, vibration, ultrasonic, or differential pressure.

To measure the static liquid, assume its density is uniform. Let ρ be the density, g be the gravity, and h be the height of the liquid column. The static pressure of the liquid column is P = ρ g h.

The density of a liquid can be calculated by measuring the static pressure and height of the liquid column.

The static pressure density meter can measure the density of high viscosity liquids. However, it is easily affected by fluctuations in liquid level.

To remove the impact of liquid level changes, we often use the differential pressure method. This method involves the liquid flowing through a vertical conduit. Install two pressure sensors spaced h apart on the conduit. The measured pressures are P 1 and P 2 , respectively. After measuring the pressure of two liquid columns of different heights. It can be obtained from formula (1): P 1 – P 2 =ρ g (H 1 – H 2 ).

H 1 , H 2 are the heights of the two pressure sensors from the liquid surface, P is the density of the liquid to be measured, and g is the acceleration of gravity.

Let P 1 – P 2 =ΔP , H 1 -H 2 =h, from the formula (sample):

FAQ

An online density measurement instrument is a tool that measures fluid density in real-time. Typically, it goes directly into pipelines or tanks in industries. It gives constant data that’s important for controlling processes and ensuring quality.

A digital density meter is a device that uses electronic components to measure the density of a substance. Unlike traditional analog meters, it displays the readings digitally, often on an LCD screen. The device can record data, adjust easily, and work with computers for analysis and reporting.

The Schmidt density meter is a specific type of tool used to measure the density of liquids. Named after its inventor, it operates on a mechanical principle where a floating piston in a cylindrical chamber is used to find the density. This method is used in labs for precise density measurements and detailed analyses.

Yokogawa is a company that manufactures various industrial instruments, including density meters. A Yokogawa density meter is known for its accuracy, reliability, and cutting-edge technology. In industrial settings, it can use different methods to measure fluid density. It is popular because it works well in tough conditions.

Radar Water Level Sensor 0.05m～35m ~70m~120m

Posted on August 14, 2023 by KimGuo11

Radar water level sensor is a commonly used water level measuring instrument, which uses radar technology to measure the water level of reservoirs, rivers, lakes, dams, deep wells, etc. The Radar water level sensor supplied by Sino-Inst is a 76-81GHz frequency modulated continuous wave (FMCW) radar product, which supports four-wire and two-wire applications. Multiple models, the maximum range of the product can reach 120m, and the blind zone can reach 8 cm. There are PP material and stainless steel material can be customized. Support RS485 Modbus and other signal output.

RFQ

Radar Water Level Sensor Technical Specifications

Measuring medium: water
Measuring range: 0.05m～35m ~70m~120m
Process connection: G1½A / 1½NPT thread / bracket
Process temperature: -40～80℃
Process pressure: -0.1～0.3 MPa
Antenna size: 42mm lens antenna
Antenna material: PTFE
Accuracy: ±1mm
Protection class: IP67
Center frequency: 76GHz~81GHz
Launch angle: 6°
Power supply:
Two-wire system/DC24V
Four-wire system/DC24V
Four-wire system/AC220V
Shell: aluminum (with display)
Signal output: RS485 Modbus
Display: with display/without display

Main advantages:

Based on the self-developed CMOS millimeter wave RF chip, a more compact RF architecture is achieved. Higher signal-to-noise ratio and smaller blind spots.
5GHz working bandwidth enables the product to have higher measurement resolution and measurement accuracy.
The narrowest 3° antenna beam angle, the interference in the installation environment will have less impact on the instrument. The installation is more convenient.
The wavelength is shorter and has better reflection characteristics on solid surfaces. Therefore, no special universal flange is required for aiming.
Support remote debugging and remote upgrade. Reduce waiting time and improve work efficiency.
Support mobile phone Bluetooth debugging. It is convenient for on-site personnel to maintain work

Communication and Debugging

The instrument can be debugged through the LCD on site. It can also be debugged on the PC side with the optional host computer software.
The communication between the radar instrument and the PC is carried out in the following ways:

USB to RS485 serial cable (four-wire system);
USB to TTL serial cable (two-wire system);
USB to Hart-modem (two-wire system) for communication.
Debugging via mobile phone Bluetooth makes on-site debugging safer and more convenient.
4G network, through the remote module, for remote debugging.

Radar Water Level Sensors Applications

Radar Water Level Sensor Measuring Culverts

A culvert is an engineering structure used to solve the intersection of rivers, streams and other water bodies in road or rail traffic. It works by creating a channel under a body of water that allows the flow of water to flow through it. While maintaining road or rail connectivity. Water level monitoring is crucial in the design and maintenance of culverts.

As a commonly used measuring device, Radar Water Level Sensor has its unique advantages, which can accurately and real-time monitor the water level changes of culverts.

Through the monitoring and analysis of the water level data of the culvert, the water level change of the culvert can be understood in time.

For example, in the rainy season, if the water level of the culvert exceeds a certain safe water level. Engineers can take timely action. Such as increasing the drainage capacity of culverts to ensure smooth and safe traffic.

In addition, water level data can also provide important reference information when maintaining and repairing culverts. Helps engineers determine if culverts have problems or require maintenance.

Application of Radar Water Level Sensor in Shoal

There are several aspects to the application advantages of Radar Water Level Sensor in shoals.

First of all, Radar Water Level Sensor uses microwave signals to measure, which has the characteristics of high precision. It can realize fast and accurate measurement of shoal water level.

Secondly, Radar Water Level Sensor is not affected by weather conditions. Water level measurement can be carried out in various harsh environments, such as rainy and snowy weather, night and so on.

At the same time, the Radar Water Level Sensor is not affected by physical disturbances such as currents, wind and waves. It can realize stable and accurate water level measurement.

Finally, Radar Water Level Sensor is suitable for the measurement of various water environments, and can adapt to various water environments such as shoals, rivers, and lakes.

Radar Water Level Sensor measures river course

As an instrument for measuring river channels, Radar Water Level Sensor uses high-frequency pulse waves for measurement, which has the advantages of high precision and high resolution.

Accurate and real-time monitoring of the water level of the river can be realized, and the precision and accuracy of water level monitoring and control are effectively improved.

In addition, the non-contact measurement method is used to avoid errors and potential safety hazards that may occur in the traditional physical contact measurement method.

At the same time, non-contact measurement can also perform automatic monitoring, which improves the efficiency and accuracy of water level monitoring.

Radar Water Level Sensor measures manhole

As a part of the urban drainage system, the water level measurement of the inspection well faces some particularities and the environment is complex. The inspection well is usually located underground and the environment is complex. There are factors such as high humidity and large temperature changes, which will interfere with the water level measurement.

Large range of water level changes: The range of water level changes in inspection wells is usually large. The water level changes greatly from dry wells to full wells. It is necessary for measuring instruments to have a large measurement range and high precision.

Dirt interference: There may be a lot of dirt in the inspection well, such as sediment, garbage, etc. These dirt will interfere with the water level measuring instrument and affect the measurement accuracy and stability.

Radar Water Level Sensor has great advantages in manhole measurement. It can not only work stably in a complex environment, but also provide accurate and reliable water level data. It provides an important basis for inspection well management and maintenance.

Radar Water Level Sensor measures reservoir water level

A reservoir is an artificially constructed water storage facility, and its water level measurement is very important for the management and operation of the reservoir. Radar Water Level Sensor is widely used in the measurement of reservoir water level due to its stable and reliable features.

First of all, the water level of the reservoir changes slowly. Compared with other water bodies, the water level of the reservoir is usually relatively stable. In this way, the Radar Water Level Sensor can accurately measure the water level and give feedback to the management personnel in time. It is convenient for them to manage the reservoir and scheduling.

Second, the water level of the reservoir varies widely. Radar Water Level Sensor can meet this demand. It has a wide measurement range and can adapt to different water level changes.

In addition, the measurement accuracy of the reservoir water level is high. The Radar Water Level Sensor features high precision to accurately measure water levels.

More Radar Water Level Meters

**SIRD-906 Radar Sanitary Level Sensor**

**SIRD-909 Radar Non-Contact Water Level Sensor**

FAQ

A radar water sensor works by emitting radio waves that bounce off the surface of the water. The time it takes for the waves to return is measured, and this information is used to calculate the distance to the water surface, thus determining the water level.

A radar sensor for water level measurement is a device that uses radar technology to measure the level of water in a container, tank, or natural body of water. It sends out radar waves and measures their reflection to accurately determine the water’s height.

The accuracy of a water level sensor depends on the technology used and the conditions under which it’s operated. Generally, modern water level sensors can be quite precise, with accuracies ranging from 0.25% to 1% of the full scale.

Radar type level transmitters are known for their high accuracy, often within 1 mm or even better. Their performance can be affected by factors like the material of the container, the type and angle of the radar waves, and environmental conditions, but in general, they are considered highly precise for level measurement.

Tuning Fork Density Meter

Posted on August 10, 2023 by KimGuo11

Tuning fork density meter is also called density analyzer , fork densitometer or density sensor. Tuning fork density meter is a process control instrument for density as the primary control parameter, or an online analysis instrument for other quality control parameters such as solid percentage. Continuous and real-time online measurement of fluid density. The Tuning fork density meter is installed on the pipeline, in an open or closed storage tank, and the density of the detected fluid depends directly on the vibration frequency received by the tuning fork in the medium where the sensor is inserted.

RFQ

Features of Tuning Fork Density Meter

Tuning fork vibrating density meter, equipped with a microprocessor-based electronic conversion device. Integrates signal processing, calculation and diagnostic functions;
In addition to convincing measurement accuracy and reliability, it can directly communicate with PC through the RS485 interface. Under the ADView software environment, users can directly perform online node configuration, fault diagnosis and data recording;
While measuring density and temperature, parameters such as basic density, °API, Brix, concentration percentage, mass percentage, volume percentage, and specific gravity can also be calculated;
The instrument adopts various chips with high performance, high speed and high reliability. It optimizes signal acquisition, algorithm and mechanical structure. Thereby improving the response speed, function and reliability of the product;
The instrument can switch the alarm mode according to the demand;
Customized adjustment sensitivity according to material and site requirements;
According to the on-site use environment, we can provide products with high protection, explosion-proof, high temperature and high pressure resistance;
In addition, there are many options for the power supply mode, connection mode, and liquid-wetted material of the product for users to match;
Simple installation, plug and play, maintenance-free. Can measure the density of mixed media containing solids or air bubbles;
Built-in PT100 temperature sensor to realize full temperature automatic compensation;
The circular arc structure design of the fork body avoids hanging material and has good stability.

Technical Parameters

Measuring range	0 – 2.5 g /cc (0 – 2500 kg/m3)，0~100.0%
Calibration range	0 – 2.5 g /cc (0 – 2500 kg/m3)，0~100.0%
measurement accuracy	± 0.001 g /cc (± 1 kg/m3) ，±0.5%
repeatability	± 0.001 g /cc (± 0.1 kg/m3) ±0.1%
Operating temperature range	-50℃ ~ +150℃
working pressure	4mpa
Fluid Viscosity Range	0 – 2000 cP
Temperature Coefficient	Less than 0.1 kg/m3 /°C (±0.5%) after correction
pressure effect	negligible
Built-in temperature sensor	Digital sensor, temperature compensation
Wetted material	316L, 2205, 2507 Stainless Steel, Ha C, Titanium, PTFE/PFA
Fork Coating	Standard PTFE or PFA
Power supply	24VDC, ≥50mA
Analog signal output	4-20mA, 0-1000Hz, RS485 Modbus RTU HART
Output accuracy (20℃)	± 0.1% of reading or ± 0.05% FS
Output repeatability (-40 ~ +85°C)	± 0.05% FS
process connection	DIN 50 PN16 G1.5″ Thread, 3″ Chuck, IDF and RJT Sanitary
degree of protection	IP65
shell	aluminum alloy

Model: Alcohol Concentration Meter
Length: 150mm
Measuring range: 0-2.5g/cc(0-100%)
Measurement accuracy: 0.002g/cm3 (0.5%)
Voltage: DC24V
Explosion-proof: Exd IICT6 Gb
Electrical interface: M20*1.5
Wetted material: 316L, built-in temperature sensor
Liquid crystal display: density, concentration, specific gravity, temperature

Model: Submersible tuning fork density meter
Four-wire system/two-wire system
Power supply: DC24V
Connection method: DN50PN16
Insertion length: 10m
Wetted material: 316L stainless steel
Output: 2-way 4-20Ma+RS485/MODBUS
Electrical interface: M20*1.5
Display: Four digits after the decimal point, LCD, remote PLC/DCS
Junction box: aluminum alloy

Model: Anti-corrosion tuning fork density meter
Four-wire system
Power supply: DC24V
Connection method: DN50PN16
Insertion length: 150mm
Wetted material: 316L stainless steel lined with PTFE
Output: 2 channels 4-20Ma+RS485/MODBUS/HART
Electrical interface: M20*1.5
Display: four digits after the decimal point, LCD, remote PLC/DCS
Junction box: aluminum alloy

Model: Threaded tuning fork density meter
Four-wire system
Power supply: DC24V
Connection method: G1-1/2 thread
Insertion length: 150mm
Wetted material: 316L stainless steel
Can be customized (ha C, titanium, 2205, 2507
Duplex stainless steel, load)
Output: 2 channels 4-20Ma+RS485/MODBUS/HART
Electrical interface: M20*1.5
Display: Four digits after the decimal point, LCD, remote PLC/DCS
Junction box: aluminum alloy

Model: Flange standard tuning fork density meter
Four-wire system (for measuring lime slurries, mud, etc.)
Power supply: DC24V
Connection method: DN50PN16-20592
Insertion length: 150mm
Wetted material: 316L stainless steel
Can be customized (ha C, titanium, 2205, 2507
duplex stainless steel, aluminum, PTFE/PFA)
Output: 2 channels 4-20Ma+RS485/MODBUS/HART
Electrical interface: M20*1.5
Display: Four digits after the decimal point, LCD, remote PLC/DCS
Junction box: aluminum alloy
Built-in temperature sensor, automatic compensation

Model: Sanitary Chuck type tuning fork density meter
Four-wire system
Power supply: DC24V
Connection method: 3 inch chuck
Insertion length: 150mm
Wetted material: 316L stainless steel
Can be customized (ha C, titanium, 2205, 2507
duplex stainless steel, tan, PTFE/PFA)
Output: 2 channels 4-20Ma+RS485/MODBUS/HART
Electrical interface: M20*1.5
Display: Four digits after the decimal point, LCD, remote PLC/DCS
Junction box: aluminum alloy
Built-in temperature sensor, automatic compensation

Model: Top Mounted Rod Tuning Fork Density Meter
Four-wire system/two-wire system
Power supply: DC24V
Connection method: DN50PN16
Insertion length: 3m (shield type)
Wetted material: 316L stainless steel
Output: 2 channels 4-20Ma+RS485/MODBUS/HART
Electrical interface: M20*1.5
Display: density, concentration, temperature, remote PLC/DCS
Junction box: aluminum alloy
Built-in temperature sensor, automatic compensation

Model: Pool tank or special type with stirring tank
Four-wire system
Power supply: DC24V
Connection method: DN50PN16
Insertion length: 150mm
Wetted material: 316L stainless steel
Can be customized (ha C, titanium, 2205, 2507
duplex stainless steel, tan, PTFE/PFA)
Output: 2 channels 4-20Ma+RS485/MODBUS/HART
Electrical interface: M20*1.5
Display: four digits after the decimal point, LCD
Junction box: aluminum alloy
Built-in temperature sensor, automatic compensation

Measuring Barrel

fork density meter principle

Tuning fork density meter (concentration meter) can perform density detection online in real time. It can be applied to the process control of products with density as the basic parameter or the quality control with solid percentage or concentration percentage as reference.

Typical industries include petrochemical industry, brewing industry, food industry, pharmaceutical industry and mineral processing (such as clay, carbonate, silicate, etc.). Specifically used in the interface detection in multi-product pipelines in the above industries, the density detection of stirred mixtures, the end point monitoring of reactors, and the interface detection of separators.

Tuning fork density sensors work on the principle of vibration of components, which are part of the tuning fork immersed in the liquid to be measured. The tuning fork part is vibrated by an internal piezoelectric device fixed at the bottom end of the fork body. The oscillation frequency is detected by a secondary piezoelectric device fixed at the other end of the fork. The signal is then amplified by the circuit on top. The density of the liquid is closely related to the vibration frequency when the measured liquid flows. When the density of the measured liquid changes, the vibration frequency of the liquid changes accordingly.

Through the following equation, the density of the measured liquid can be accurately calculated.

D= K0+K1T+K2T2
D = uncalibrated density of the measured medium (kg/m3)
T=vibration frequency (μs).
K0, K1, K2 = constant

During the density detection process, the Tuning fork density meter (concentration meter) can automatically compensate the influence of temperature on the density (D) of the measured medium. Pressure has no significant effect on density.

Read More About: What Is Density Meter? and Types

Tuning Fork Density Meter Application

Tuning fork density meters are suitable for measuring the density of various types of liquids and solid substances.

Its application range is quite wide, including but not limited to the following types of substances:

Liquids: water, solutions, alcohols, petroleum, chemicals, liquid metals, etc.
Solution: solid or gas dissolved in a solvent, such as salt water, acid-base solution, dissolved matter in an organic solvent, etc.
Oil: various types of lubricating oil, mechanical oil, edible oil, etc.
Chemicals: various chemicals, solvents, acids and bases, etc. nitric acid, phosphoric acid, acetic acid, chloroacetic acid, potassium hydroxide, sodium chloride, sodium sulfate, ammonium sulfate, ammonium bisulfate, ammonium chloride, carbamide, ferric chloride, ammonia, hydrogen peroxide
Fuel: gasoline, diesel, liquefied petroleum gas (LPG), aviation fuel, crude oil, kerosene, silicone oil, etc.
Plastics: Different kinds of plastic materials, resins, etc.
Metal: liquid metal, alloy, etc.
Food and beverages: milk, juice, beer, wine, etc.
Organic chemical industry: ethanol, methanol, ethylene, toluene, ethyl acetate, ethylene glycol, thinner water
Medicine: pharmaceutical intermediates, solvents, polyvinyl alcohol (PVA), citric acid, lactic acid
Semiconductors: high-purity solvents, detergents, isopropanol, butyl acetate
Printing and dyeing: sodium hydroxide, sodium carbonate, sodium bicarbonate
Equipment: cutting fluid, emulsified oil, cutting oil, lubricating oil, antifreeze
Batteries: hydrochloric acid, sulfuric acid

Typical application industries:

Chemical measurement;
reservoir measurement;
Slurry measurement;
Medicine tank measurement;
Cement measurement;
printing and dyeing measurement;
Waste acid tower measurement;
power plant measurement;

Please note that different models of tuning fork densitometers may have limited range of application. Specific measurement ranges and accuracies may depend on equipment specifications and manufacturer’s instructions. Therefore, before choosing a tuning fork density meter for specific material density measurements. It is best to refer to the technical specifications and instructions for use of the equipment to ensure that it is suitable for the substance of interest.

case study

A customer consulted us and needed to measure the density in the sediment pipe dug out by the dredger.

For dredger applications:

Installation size: pipe with a diameter of 30cm
Insertion Depth Length: 2”
Wetted material: mud sand
Need signal output: 4-20ma
Pressure: 0-10bar
Density (or concentration) range: 0-2000kg/m3

Combined with the user’s measurement parameters, we have configured a density meter for the user:

Tuning Fork Density Meter:

A layer of wear-resistant material is added to the 316 sensor
Power supply DC24V,
Medium: Mud,
Pressure: 0-10bar,
DN50 flange connection,
Insertion depth: 180mm,
Material: 316+ wear-resistant coating,
Output 4-20mA four-wire system + RS485,
Density (or concentration) range: 0-2000kg/m3,
Installation size: pipe with a diameter of 30cm,
English interface

FAQ

A fork density meter uses a tuning fork-shaped probe that vibrates at its natural frequency. When immersed in a liquid, the frequency changes based on the liquid’s density. By measuring this frequency change, the device can accurately determine the density of the liquid.

Tuning fork density measurement is a method to measure the density of a liquid. It uses a fork-shaped sensor that vibrates at a specific frequency. When this fork is exposed to a liquid, the density of the liquid alters the vibration frequency. This change in frequency is then analyzed to calculate the liquid’s density.

A density meter works by employing different principles like oscillation, buoyancy, or radiation to measure the density of a substance. By observing how the substance interacts with these principles, the meter can calculate the mass per unit volume, providing the density of the material.

A densimeter is used to measure the density of a substance, typically liquids or gases. Density is the mass of the material per unit volume and is a crucial property in various industrial, laboratory, and research applications.

Ultrasonic Level Transmitter Installation Guide

Posted on August 7, 2023 by KimGuo11

What points should be paid attention to for Ultrasonic level transmitter installation? Ultrasonic level transmitter is a widely used non-contact/non-invasive liquid level meter. Including wastewater storage tanks, fuel storage tanks, wastewater treatment pools, etc. Connect to the display table or various DCS systems through 4~20mA or RS485 (Modbus protocol or other customized protocols). Provide real-time liquid level data for industrial automation.
Let’s take a look at the Ultrasonic level transmitter installation requirements and what the installation principles are.

RFQ

Ultrasonic level transmitter working principle and frequency range

Ultrasonic level transmitter is a cost-effective liquid level measuring instrument. It is mainly composed of three parts: transducer, electronic module and housing. The transducer is one of the core components, and the working frequency of the transducer is one of the important parameters.

Ultrasonic pulses are emitted by sensors (transducers) during the measurement. The sound waves are reflected by the liquid surface and picked up by the same sensor. Converted into electrical signals by piezoelectric crystals. And the distance between the sensor and the surface of the liquid to be measured is calculated by the time between the emission and reception of the sound wave.

The selection of the operating frequency of the ultrasonic transducer is a very important parameter. It is not only directly related to the frequency characteristics and directional characteristics of the transducer. It also affects important performance indicators such as the transmitting power and transmitting efficiency of the transducer. In general, the working frequency of the ultrasonic level gauge is consistent with the working frequency of the ultrasonic transducer.

Working frequency is an important parameter of ultrasonic liquid level gauge. During the production of each ultrasonic sensor of Sino-Inst, the working frequency and impedance characteristics of the transducer are strictly measured and recorded to ensure product quality.

Featured Ultrasonic Level Transmitters

**ULT-100A Ultrasonic Level Transducer**

**ULT-100 Explosion-proof** **Ultrasonic Level Indicator**

**HS-2000 Ultrasonic Tank Level Sensor-External Mounted**

Principles of Ultrasonic Level Transmitter installation

When you’re installing an Ultrasonic Level Transmitter, in addition to meeting the installation requirements, there are certain principles to consider:

The distance from the probe’s emission surface to the low liquid level should be less than the range of the purchased transmitter.
The distance from the probe’s emission surface to the high liquid level should be greater than the blind zone of the purchased transmitter.
The probe’s emission surface should remain parallel to the liquid surface.
The location of the probe’s installation should ideally avoid areas directly below inlets and outlets where the liquid surface experiences significant fluctuations.
If the pool or tank wall is not smooth, the transmitter’s installation location should be more than 0.3m away from the wall.
If the distance from the probe’s emission surface to the high liquid level is less than the blind zone of the purchased transmitter, an extension tube should be installed. The extension tube should have a diameter greater than 120mm, and a length between 0.35m and 0.50m. It should be installed vertically, have a smooth inner wall, and the opening in the tank should be larger than the extension tube’s inner diameter. Alternatively, the tube can extend to the bottom of the tank and should have a diameter greater than 80mm. Holes should be left at the bottom of the tube to keep the internal liquid level of the extension tube at the same height as inside the tank.

Basic Requirements for Ultrasonic Level Transmitter Installation

Before installing an ultrasonic level transmitter, make sure the instrument model meets the environmental requirements of the site, such as process pressure, process temperature, and chemical properties of the medium. This will ensure normal operation after installation.

Ultrasonic level transmitters have a certain emission angle when transmitting ultrasonic pulses. There should be no obstacles within the radiating area of the emitted ultrasonic beam from the lower edge of the ultrasonic transducer to the surface of the medium being measured. This requires avoiding internal facilities such as ladders, heating equipment, and limit switch brackets during installation.

Moreover, note the following when installing an integrated ultrasonic level transmitter:

Because of the sound beam angle, the ultrasonic beam should not intersect with the feed flow. Therefore, do not install the integrated ultrasonic level transmitter above the feed flow to ensure measurement of the medium surface and not the feed flow. Make sure the highest material level does not enter the measurement blind zone during installation.
The integrated ultrasonic level transmitter must maintain a certain distance from the tank wall.
The installation of the integrated ultrasonic level transmitter should aim to keep the transducer vertical to the liquid surface.
When installing the instrument outdoors, sunshade and rain protection measures should be adopted to avoid direct sunlight and reduce measurement errors caused by temperature changes.
The integrated ultrasonic level transmitter installed in hazardous areas must comply with national explosion-proof hazardous area installation regulations. In places where explosion-proof requirements are needed, the ultrasonic level transmitter must be grounded.

Other Requirements for Ultrasonic Level Transmitter Installation

Installation location: Keep the integrated ultrasonic level transmitter at least 200mm away from the tank wall. For a conical container with a flat tank top, install the instrument at the central position of the container top. This ensures measurement to the bottom of the container. For an arch-shaped tank, install it at 1/2 or 2/3 of the tank top radius. For trenches, take into account the load-bearing capacity of the bracket when installing. The probe emission angle should not exceed the A point boundary. The installation height must be within the range.
Moisture proofing: If the instrument is installed outdoors, in a humid indoor environment, or on the top of a refrigeration or heating tank, the environment is humid. Rainwater and condensation can flow down. To prevent moisture, before connecting the cable, please bend the cable and lead it downwards to prevent water or moisture from entering the instrument. Tighten the cable sealing sleeve.
Stirring effects: If there is stirring in the tank, the integrated ultrasonic level transmitter should be away from the stirrer to eliminate the false echo effect caused by the stirring blades. If foam is generated due to stirring or waves are turned up, use the guide wave tube installation method.
Foam effects: During feeding, stirring, or other treatments in the container, foam can form on the surface of some media, causing the ultrasonic level transmitter signal to attenuate. To avoid measurement errors caused by foam, install the sensor in the guide tube or use a guided wave radar level gauge. The guided wave radar level gauge is not affected by foam and is an ideal choice for this type of application.
Airflow effects: If there is a strong airflow or air vortex in the container, or it is installed outdoors and the wind is strong, install the sensor in the guide tube or use a guided wave radar level gauge.

**Portable Ultrasonic Liquid Level Indicator**

**Ultrasonic Oil Level Sensor-External Paste-Truck Fuel Tank**

**Ultrasonic Sludge Interface Meter /**
**Sludge Level Meter**

**Portable Ultrasonic Water Depth Gauge**

Ultrasonic Level Transmitter Installation method:

In open environments, installation is generally achieved using a bracket, securing the device with the included locknut. Alternatively, you can drill a circular hole with a diameter of 60mm at the desired installation spot on the top of the tank or lid, and place the device in it. Then, tighten the locknut from underneath.

It is crucial to ensure that the face of the transmitter’s probe is parallel to the liquid surface being measured.

As illustrated, the probe of the device emits waves that reflect back upon hitting the liquid level. The probe calculates the time taken from emission to reception of these waves to determine the measured empty distance, H.

Subtracting the measured empty distance H from the installed height TH gives you the current liquid level, L. The transmitter’s range is the distance it can measure, and the installed height TH should be less than this range.

The device’s blind zone is the area near the probe that cannot be measured. The distance between the highest liquid level and the probe should be greater than the blind zone. For instance, if the blind zone is 0.5m, the distance between the highest liquid level and the probe must be more than 0.5m.

For example: If the range is 6 meters, the blind zone is 0.45 meters, the actual maximum measurable liquid level is between 0 to 5.5 meters. The emission of waves from the probe is a diffusion process, meaning it has a directional angle. Pay attention during installation to avoid hitting protrusions on the pool wall or the edge of the channel.

FAQ

To install an ultrasonic level transmitter, first, confirm the suitable spot for the device, either on a bracket or on the top of the tank or lid. Drill a hole if necessary. Place the device and secure it with the included locknut. Ensure the face of the transmitter’s probe is parallel to the liquid surface being measured.

Do not install the sensor where the emitted ultrasonic waves might hit obstacles like ladders, heating devices, or limit switch brackets within the tank.
Do not install the sensor where it might directly intersect with the inflow of material.
Avoid installing in a location where the sensor would be exposed to extreme weather conditions without adequate protection.

The ultrasonic sensor should be mounted in a location where its probe can be parallel to the liquid surface being measured. This is often at the top of the tank or the lid. Ensure that the sensor is at a safe distance from the walls of the container and away from any internal installations like ladders or heating devices.

Ultrasonic sensors can be mounted by placing them in the desired spot, either on a bracket or a drilled hole on the top of the tank or lid. Secure the sensor with the included locknut from underneath. Make sure the sensor’s probe is parallel to the liquid surface being measured for accurate readings.

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Case Examples: Handheld density meter for petroleum products

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Sino-Inst’s Solution:

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1. Tuning fork density meter

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4. Radioactive isotope density meter

5. Ultrasonic density (concentration) meter

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Full PTFE package – (tetrafluoro) super corrosion resistance

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