The principle, advantages and disadvantages of submersible level transmitter

The immersion level transmitter is directly put into the measured medium, which is very convenient to install and use. Solid structure, no moving parts, high reliability, long service life, high-precision measurement can be performed from water, oil to high-viscosity paste, and it is not affected by the foaming, deposition and electrical characteristics of the measured medium. Wide range of temperature compensation.

1. The basic working principle of the immersion level transmitter is static pressure level measurement.

In a liquid medium, the pressure generated at a certain depth is the weight of the medium above the measuring point. It is proportional to the density of the medium and the local acceleration of gravity. The proportional relationship between them is reflected by the formula P=ρGH. Among them, P=pressure, ρ=medium density, G=gravitational acceleration, and H=depth of the measuring point. Therefore, the physical quantity measured by the immersion level meter is actually pressure, which can be understood through the calibration unit MH2O of the immersion level meter. The actual liquid level must be obtained by conversion after knowing the two parameters of density and gravity acceleration. Such conversion is usually performed through secondary instruments or PLC in the industrial field.

2. Advantages and disadvantages of immersion level transmitter

1. Main advantages:

High measurement accuracy; easy installation; signal can be remotely transmitted;

It can resist corrosion from various media by selecting different materials; it is suitable for explosion-proof occasions; and it has a moderate price.

2. Disadvantages:

The measurement signal needs to be converted; the medium temperature exceeding 125°C cannot be measured; the density of the measurement medium must be uniform.