Working principle of input level gauge

The input level gauge can be used to measure the liquid level in open containers and canals, lakes and wells. It has the characteristics of simple structure, accurate measurement and convenient installation. Working principle of input level gauge I. Product overview

The input level gauge can be used to measure the liquid level in open containers and canals, lakes and wells. It has the characteristics of simple structure, accurate measurement and convenient installation.

Second, the product structure

The input level gauge consists of a stainless steel probe, a gas guiding cable and an electrical box.

The transmitter's probe is a 316 stainless steel construction that can be used directly into the measured level. The sensor chip is isolated from the media by a 316L stainless steel diaphragm and filled with silicone oil, which ensures that it can measure the level of a variety of media.

The transmitter probe and the electrical box are connected by a special cable. There is an air pipe in the middle of the cable to make the back pressure chamber of the sensor communicate with the atmosphere. The cable is connected to the probe and the electrical box. The electrical box has a circuit chamber and a wiring chamber. The composition, zero and span can be adjusted on the board.

Third, the working principle

When the transmitter is put into a position in the liquid, the pressure of the sensor is P=9.807, ρH, where P--the pressure felt by the sensor, in kPa, ρ- - liquid density, in g/cm, H - - The height of the liquid to be tested, in m, so the H≈0.102P/ρ transmitter converts the sensed pressure signal into an electrical signal, which is proportional to the height of the liquid.



Fourth, functional specifications

Measuring range: 0~1m...0~100m

Output: 4 ~ 20mA

Power: 13 ~ 36VDC, allowing no load to work.

Five, load characteristics

The maximum loop resistance is determined by the voltage of the power supply, as described in the following equation.

Maximum load resistance calculation: R=(U-13V)/20-r

Where: U is the supply voltage

r is the cable resistance



Sixth, temperature range

Medium temperature: -20 ~ 70 °

Ambient temperature: -40 to 85 °

Storage temperature: -40 ~ 85 °

Humidity: Relative humidity is 0~100%.
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