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What Are The Self-solving Solutions For Pressure Sensor Basic Faults?

Apr 01, 2019

What are the self-solving solutions for pressure sensor basic faults?

The application of the pressure sensor is very extensive. 

Xi'an Huaheng Instrument introduces you: its application environment is also very diverse. 

In the environment with the harsh environment, the requirements of pressure sensor will be more severe, for example, at high impact pressure and high overload pressure. 

For measurement applications, conventional pressure sensors and measurement methods cannot meet the measurement requirements of this environment. 

Fuel pressure sensor, pressure sensor air conditioner.


Generally, ordinary ceramic pressure sensors or diffused silicon pressure sensors are used to measure high impact pressure, but not directly. At this time, we can add a buffer tube at the front end of the pressure, so that the impact pressure can be buffered. As for the pressure shock, Particularly severe applications can also measure impact pressure. This method is economical and can meet the measurement of mild impact pressure.


The most fundamental solution must be solved from the principle of the pressure sensor itself. Change the core measurement chip of the pressure transmitter instead of using a common ceramic core or a diffused silicon core, which increases the pressure transmitter's resistance to shock and overload from the source, such as using a sputter pressure sensor chip or Traditional strain gauge films are used as the core sensitive component of pressure measurement. Sputtering pressure technology has many advantages in itself, and its application status in high pressure and harsh measurement environments has basically replaced ceramic pressure sensors and diffused silicon pressure sensors.


1. When a leak occurs in the pressure sensor interface, it is likely that the actual pressure is high, but the transmitter display data does not change much. The cause of the failure of this pressure sensor may also be a wiring error or a power supply is not plugged in, and the sensor is damaged.


2. Pressurize the transmitter, the output does not change, and the pressure is changed again. After the pressure is released, the transmitter will not return to the zero position. This fault is most likely caused by a problem with the sensor's seal. If the sensor is tightened too much, the seal will enter the pressure port, causing the sensor to become clogged. If the pressure is insufficient, the output will not change; When it is over, the seal is opened and the sensor is under pressure and will change. When this fault occurs, the sensor can be removed and the zero position is observed. If it is not adjusted properly, the seal should be replaced if it is normal. Instability may be caused by a failure of the sensor itself or a weak anti-interference ability.


3. The transmitter and the pointer type pressure gauge have large deviations. This phenomenon is normal, as long as the deviation range is controlled within the specified standard.