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.

Online Density Meters- Differential Pressure Type

Features of Online Density Meters

  1. This online density meter works with liquid that is moving or still, and can be installed in pipelines or tanks.
  2. The two-wire transmitter with an integrated structure has no moving parts and is easy to maintain.
  3. Continuous online measurement of liquid density and temperature without process interruption. It can be directly used for production process control.
  4. Dual four-digit LCD display.
  5. Can see temperature and density together, which helps with converting density for industry standards.
  6. The density meter has several different wetted materials.
  7. It is easy to install and use, and the reading can be displayed after inserting the liquid.
  8. Simplified maintenance, no need for regular cleaning.
  9. Calibrating an online density meter is easy. You don’t need a reference source or lab calibration. Plus, it won’t interrupt the process.
  10. Intrinsically safe type can be used in dangerous sites.
  11. The hygienic density meter can be used in the food industry for measuring liquids and soft drinks at different production sites.
  12. The anti-corrosion density meter measures acid and alkali solutions, chemical carbamide, detergent, and more.
  13. 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.
Pipeline Density Meter

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.
Insertion Density Meter

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.
Side Mounted Differential Pressure Density Meter

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

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

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):

online density transmitter working principle

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.

More Density meter and measurement analysis solution.

Differential Pressure Online Density Meter is a cost-effective, simple and practical. That is economical and accurate. A measurement method with low maintenance workload and stable and reliable operation. It is suitable for detecting the density of flowing or static liquid. Sanitary type, high temperature type and anti-corrosion type are optional.

Online Density Meter (hydrometer) can detect and measure the density of various liquids or liquid mixtures online. In the petrochemical industry, it can be widely used in petroleum, oil refining, oil blending, and oil-water medium detection; in the food industry, it can be used for grape juice, tomato juice, Production sites such as fructose syrup, vegetable oil and soft drink processing; Dairy industry; Paper industry; Measurement of black pulp, green pulp, white pulp, and alkali solution; Alcohol in winemaking; Chemical carbamide, detergent, ethylene glycol, acid-base And the measurement of polymer density. It can also be used in industries such as mining brine, potash, natural gas, lubricating oil, and biopharmaceuticals.

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Sino-Inst is a professional Online Density Meters manufacturer and supplier. Our Online Density Meters are exported to various countries like USA, UK, Germany, Nigeria, Saudi Arabia, Singapore, etc. If you need to measure density, please feel free to contact our sales engineers.

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Online Density Meters- Differential Pressure Type|Sino-Inst

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.

Product SKU: Online Density Meter - Differential Pressure Type

Product Brand: Sino-Inst

Product Currency: USD

Product Price: 950

Price Valid Until: 2029-09-09

Product In-Stock: InStock

Editor's Rating:
5