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.
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
More Density meter and measurement analysis solution.
What Is a Dew Point Monitor and How to Choose One?
What Are Flow elements? Guide for Different Types of Flow Elements
Innovative Methods for Fluid Level Measurement
Optimize Filtration Monitoring with Differential Pressure Sensors
Low Cost Differential Pressure Sensor – Solve Big Problems!
Oxygen Cleaning Pressure Sensor – No Oil, No Corrosion, No Impurities
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.
Are you looking for wholesale online density meter? You have laanded at the right places. We have a wide variety of densitometerrs for sale including fork density m Eter, Differential Pressure Density Meter, Portable Density Meter, Coriolis Vibration Density Meter, ETC…
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.
Request a Quote
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
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
5