Measurement principle

The product uses the piezoresistive effect of single crystal silicon for measurement. It adopts a fully welded integrated oil-filled process. The single crystal silicon wafer is used as an elastic element inside. The integrated circuit process is used on the single crystal silicon diaphragm to diffuse a group of equal value resistors in a specific direction of the single crystal silicon, and the resistors are connected into a bridge circuit. The single crystal silicon wafer is placed in the sensor cavity. When the pressure changes, the single crystal silicon produces strain, causing the strain resistor directly diffused on it to produce a change proportional to the measured pressure, and then the corresponding voltage output signal is obtained by the bridge circuit. In recent years, with the continuous development and maturity of domestic single crystal silicon sensor technology, it has basically replaced the original capacitive sensor in this field.

◆ Main features

▶Use silicone oil in the capillary to transmit medium pressure;

Has good negative pressure resistance;

▶Explosion-proof: intrinsically safe (need to be used with input-type safety barriers), explosion-proof; High precision, good stability;

Good shock resistance, no mechanical moving parts;

Dual overload protection;

With PV zeroing function, rich menu, can set various parameters; Support HART communication protocol;

▶Stable backlight display, making meter reading easier;

▶Mounting bracket: pipe-mounted bent bracket, plate-mounted bent bracket, pipe-mounted flat bracket;

▶Shell material: aluminum (conventional), stainless steel.

Application scenarios

Suitable for liquid level measurement in industrial field storage tanks, reactors, intermediate tanks and other occasions. Select various types of products according to various working conditions such as medium temperature, pressure, corrosiveness, explosion-proof requirements, safety requirements, and measurement range. It can also be used as an online density to measure medium density.

Technical parameters