Lime slurry tuning fork density meter

1、 Product Introduction

Lime slurry tuning fork density meterIt adopts plug-in installation, which excites the metal tuning fork with a sound frequency signal source and makes the tuning fork vibrate freely at the center frequency. This frequency is related to the density of the liquid in contact. Therefore, by analyzing the frequency, the density of the liquid can be measured, and then temperature compensation can be carried out to eliminate the temperature drift of the system; And the concentration is calculated based on the relationship between the corresponding liquid density and concentration.

The tuning fork densitometer is mainly used for production process control and measurement in low corrosion liquid industries, such as oil refining, food and beverage, paper industry, chemical acid and alkali solutions, wine industry, salt industry, printing and dyeing, pharmaceuticals, evaporation crystallization and other industries.

2、 The working principle is as follows

Lime slurry tuning fork density meterThe concentration meter sensor operates based on the principle of component vibration, with the component part being a tuning fork immersed in the measured liquid. The tuning fork part induces vibration through an internal piezoelectric device fixed at one end of the fork body. The oscillation frequency is detected by a secondary piezoelectric device fixed at the other end of the fork, and the signal is amplified through the top circuit. The density of the liquid is closely related to the vibration frequency during the flow of the measured liquid. When the density of the measured liquid changes, the vibration frequency during the flow of the liquid also changes accordingly. The density of the measured liquid can be accurately calculated using the following equation.

D=K0+K1T+K2T2 D=uncalibrated density of the measured medium (kg/m3) T=vibration frequency (μ s). K0, K1, K2=constants. In the density detection process, the APX301 insertion density meter can automatically compensate for the influence of temperature on the density (D) of the measured medium, and pressure has no significant effect on density

3、 Product Features and Advantages

(1) A durable and reliable direct insertion instrument with high performance that requires minimal maintenance,

(2) Provide integrated "plug and play, maintenance free" density measurement

(3) Not easily affected by temperature and pressure

(4) Direct insertion densitometer is suitable for working under high pipeline pressure

(5) Provide materials including 316L, HAC, zirconium, etc

(6) Long rod type suitable for use in open and sealed cans

(7) Can achieve continuous measurement without interruption

(8) The two parameters of temperature and density can be displayed alternately, making it convenient for industry standard density conversion

(9) Easy to install and use, simply insert liquid to display readings

(10) This safety type can be used in hazardous environments; Sanitary type can be installed on food production sites

(11) High sensitivity, no impact, no hanging material

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、 Daily maintenance matters

(1) The tuning fork densitometer must not be welded to the pipeline during installation

(2) Do not drop or place this instrument or equipment

(3) Prohibit the use of instruments above rated pressure

(4) Follow the principle of handling instruments and equipment with care to prevent damage to the densitometer from collision

(5) Prohibit density meters from measuring highly corrosive liquid media

(6) This model of densitometer is suitable for all explosion-proof applications

(7) User Notice: The tested medium is not allowed to freeze, otherwise it will damage the sensing element and cause damage to the density meter, affecting normal operation

(8) Prevent contact with corrosive or overheated test media

(9) The tuning fork densitometer should be installed as much as possible in places with small temperature gradients and temperature changes, without impact and vibration

6、 Installation precautions for tuning fork densitometer

(1) Avoid contact with corrosive or overheated media

(2) Handle with care to prevent damage to the tuning fork densitometer

(3) Prohibit stress testing beyond the testing pressure

(4) Prohibition of measuring highly corrosive liquid media

(5) The tested medium is not allowed to freeze, otherwise it will damage the sensing components and cause damage to the tuning fork densitometer

(6) Do not operate the densitometer above rated pressure

(7) The instrument is suitable for all explosion-proof occasions

(8) It is strictly prohibited to weld pipes during the installation of the tuning fork densitometer

(9) It is necessary to prevent slag from depositing in the tank

(10) The tuning fork densitometer should be installed as much as possible in places with small temperature gradients and temperature changes, without impact and vibration.