Remote Seal Capillary Level Transmitter

Remote Seal Capillary Level Transmitter is mainly used for measurement in the following occasions: viscous medium at high temperature, easy to crystallize medium, precipitation medium with solid particles or suspended matter, strong corrosive or highly toxic medium, the continuous accurate measurement interface and the density. Remote transmission device can avoid the mixing of different instantaneous media, so that the measurement results truly reflect the actual situation of the process change. Remote seal capillary level transmitter  can be measure both the differential pressure and the level of the tanks with 4-20mA output.

As the isolation diaphragm is very thin, it is a weak link in corrosion resistance, so the wetted diaphragm material Hastelloy C-276, Monel, tantalum, etc., which can be applied to the anti-corrosion requirements of different situations.

What is the measuring principle of the double flange remote capillary level transmitter? 

The measuring principle of the double flange remote level transmitter is that when the two pressures of the measured medium pass into the high and low pressure chambers, they act on the isolation diaphragms on both sides of the sensitive element through the isolation sheet and The filling liquid in the element is transferred to both sides of the measuring diaphragm. The liquid level transmitter is composed of a measuring diaphragm and the electrodes on the insulating plates on both sides each constitute a capacitor. When the pressure on both sides is not constant, the measurement diaphragm will be displaced, and its displacement is proportional to the pressure difference. Therefore, the capacitance on both sides is not equal. Through the oscillation and demodulation link, it is converted into a signal proportional to the pressure.

When one end of the differential pressure gauge is connected to the liquid phase and the other end to the gas phase, according to the principle of hydrostatics, there are:

PB=PA+Hρg (2-1),In the formula:

H—— liquid height;

Ρ——The density of the measured medium;

G——The acceleration of gravity of the measured local area.

From formula (2-1), we can get:

ΔP= PB－PA= Hρg

In general, the density and gravitational acceleration of the measured medium are known. Therefore, the differential pressure measured by the differential pressure gauge is proportional to the height H of the liquid.