There Are Several Types Of Density Meters For Online Measurement Of Liquid Density:

1. Tuning fork density meter: The sensor is designed based on the principle of vibration. When the liquid comes into contact with the fork, the vibration changes, causing a change in the resonant frequency. Therefore, the accurate density value is calculated through the electronic processing unit.
2. Coriolis force online densitometer: The measuring tube continuously vibrates at a certain resonance frequency, which varies with the density of the fluid. Therefore, the resonance frequency is a function of the fluid density. By measuring the resonance frequency, the density of the fluid can be accurately obtained.
3. Differential pressure densitometer: Differential pressure densitometer is a gravity difference △ P generated by a liquid column= ρ When h is constant, the density value is obtained by dividing the differential pressure value measured by the differential pressure transmitter by the gravitational acceleration and length.
4. Nuclear magnetic resonance densitometer: Calculate density by measuring the number of hydrogen atoms in a liquid.
5. Radioisotope density meter: The instrument of the radioactive isotope density meter is equipped with a radioactive isotope radiation source. Its radioactive radiation (e.g γ Radiation is received by a ray detector after passing through a certain thickness of the tested medium. When the thickness of the medium is constant, the attenuation of rays is only a function of the density of the medium's material. The density value can be obtained through internal calculations within the instrument.
6. Ultrasonic density (concentration) meter: The ultrasonic density (concentration) meter measures the density of a liquid based on the conduction velocity of ultrasound in the liquid.
7. Mass flow meter: Calculate density by measuring the mass of a certain volume of liquid passing through a unit of time.
These density meters have their own advantages and disadvantages, and are suitable for different industrial fields and measurement needs. Choosing a suitable densitometer requires consideration of factors such as measurement accuracy, measurement range, usage environment, and cost.