Differential pressure transmitter measurement level

Differential pressure transmitter measurement liquid level, just as its name implies differential pressure transmitter measurement result is the pressure difference, namely delta P= rho delta h.And because the tank is often cylindrical, the area of the section of the circle S is constant, so, weight G= delta P·S= rho G delta h·S, S unchanged, G and delta P proportional relationship.

That is, as long as accurate detection delta P value, and height delta h into inverse ratio, in the temperature change, although the oil volume expansion or reduction, the actual liquid level rise or fall, the pressure detected is always unchanged.If the user needs to display the actual liquid level, it can also be solved by introducing medium temperature compensation.

Differential pressure transmitter is a very common measuring instrument in industrial production. It can measure temperature, pressure, flow rate and liquid level at the same time by matching with surrounding measuring equipment. Because of its high measuring accuracy, it is widely used in many industrial production fields.

The following is a list of several measurement methods of variation applied in our factory:

(1) the liquid flow rate is measured by using the differential pressure generated before and after the throttle element in combination with the throttle element

(2) to measure the height of the liquid by using the pressure difference generated by its own gravity

(3) directly measure the pressure difference between different pipelines and tanks

As long as does not become the solid state, directly USES the liquid level meter to measure, has the special direct belt transmitter, may far spread.(it's actually a pressure transmitter that converts hydraulic pressure to liquid level.)