Salt water concentration meter online tuning fork resonant density meter

1、 Product Introduction

HTDM seriesSalt water concentration meter online tuning fork resonant density meterIt can be installed in a plug-in manner and is widely used for medium density detection in pipelines, open tank containers, and closed tank containers. The fluid density directly depends on the vibration frequency received by the tuning fork when the sensor is inserted into the medium. The sensor is equipped with a built-in temperature sensor to provide temperature compensation. Typical industries that tuning fork densitometers can be involved in include the petrochemical industry, brewing industry, food industry, pharmaceutical industry, and mineral processing (such as clay, carbonate, silicate, etc.). They are specifically used for interface detection in multi product pipelines, density detection of mixed mixtures, endpoint monitoring of reaction vessels, and interface detection of separators in these industries.

2、 The working principle is as follows

HTDM seriesSalt water concentration meter online tuning fork resonant density meterIt is designed based on the principle of component vibration, similar to a two toothed tuning fork. The fork body vibrates due to a piezoelectric crystal located at the root of the tooth, and the frequency of the vibration is detected by another piezoelectric crystal. Through phase shifting and amplification circuits, the fork body is stabilized at its natural resonant frequency. When the medium flows through the fork, the change in the mass of the medium causes a change in the resonant frequency.

3、 Product Features and Advantages

(1) The tuning fork densitometer can continuously measure the density of the medium in pipelines and storage tanks in real time, without the need for a specific height difference in liquid level, and the selection of measurement points is more flexible;

(2) The structure is simple, without throttling elements, the pressure loss of the piping system is almost zero, and for highly corrosive media, the material selection is more extensive and economical;

(3) Easy to install, plug and play, maintenance free;

(4) Can measure the density of mixed media containing solids or bubbles;

(5) The online tuning fork densitometer adopts the acoustic resonance method, which can measure substances with high precision, achieving an accuracy of 0.0005g/cm ³;

(6) It can measure various liquid substances, including various chemicals, petroleum products, beverages, etc., with a wide measurement range;

(7) The online tuning fork density meter supports analog output and digital signal output, and can be connected to other devices, with high scalability and wide applicability.

(8) The tuning fork densitometer can continuously measure the density of the medium in pipelines and storage tanks in real time, without the need for a specific height difference in liquid level, and the selection of measurement points is more flexible;

(9) The structure is simple, without throttling elements, the pressure loss of the piping system is almost zero, and for highly corrosive media, the material selection is more extensive and economical;

(10) It also performs well in harsh working conditions such as high pressure, high viscosity, and strong corrosion, and eliminates the threat of radioactive substances to the health of operators, making it more environmentally friendly and safe.

4、 The selection technical parameters are as follows

Measurement range: 0~100.0%

Calibration range: 0~100.0%

Measurement accuracy: ± 0.5%

Repeatability: ± 0.001 g/cc (± 0.2 kg/m3) ± 0.1%

Operating temperature range: -50 ℃~+150 ℃

High work pressure: 3mpA

Fluid viscosity range: 0-600cP

Pressure impact: negligible

Built in temperature sensor: digital sensor

Wetting material: 316L, 2205 stainless steel, Ha C, titanium alloy

Fork body coating: standard PTFE or PFA

Power supply: 24VDC, ≥ 50 mA

Analog signal output 4-20 mA, 0-1000Hz, RS485 Modbus RTU

Output accuracy (20 ℃): ± 0.1% or ± 0.05% FS of the reading

Output repeatability (-40~+85 ℃): ± 0.05% FS

Process connection: DIN 50 PN16 DIN 50 PN40

IDF and RJT sanitary type

Protection level: IP65

Shell: Aluminum alloy

5、 Application in the Instrumentation Industry

Sugar and brewing industries: extracting fruit juice, syrup, grape juice, alcohol, ethane ethanol interface, etc;

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

Mining: coal, potash, salt water, phosphate, this compound, coal slurry, ore slurry, limestone, copper, etc;

Refining: lubricating oil, aromatic agents, 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 soda, etc;

Desulfurization and desulfurization: acid, caustic soda, urea, ammonia water, slurry, etc;

6、 Installation precautions for tuning fork densitometer

Unlike pipeline density sensors, the fork part of an insertable density meter is not fully enclosed

1. Pipe wall or container

The boundary effects generated by the wall on the fluid, combined with the viscosity effect of the measuring medium itself, will have a certain impact on the measurement calibration of the sensor. In order to overcome these, we have summarized and set installation methods and pipe diameters in advance for different environments, which facilitates selection under the same conditions.

2. Calculation of flow velocity

V=Q/(1/4 * π * d2) Example: Flow rate 20m3/h Pipe diameter 100mm

V=20/3600/(1/4 * 3.14 * 0.1 * 0.1)=0.7 meters per second

3. Installation and positioning

In order to ensure accurate measurement and stable display of the density meter, the flow velocity of the measured medium shall not exceed 1m/s, and the diameter of the pipeline for installing the density meter shall beWhen the diameter is greater than or equal to 159mm, the position where the density meter is installed should be as far away from the pump as possible, with a recommended distance of more than 5m. When the flow velocity is greater than 1 m/s, the diameter of the pipeline where the density meter is installed should be expanded by 1.5 times for every 1m increase in flow velocity. There should be a straight pipe section of ≥ 600mm in front of the instrument and a straight pipe section of ≥ 300mm behind the instrument to ensure that the fluid flows in laminar flow when passing through the fork.