Sensor are generally integrated the cutting-edge technology in each period of production line so most of them are very great after the factory.

However, in the working environment, the sensors are exposed to the environment, directly affected by temperature, humidity, shock due to collision during transport or replacement, frequency of work ... These factors cause uncertainty result of the sensor during operation.

In addition, sensor materials also have a certain lifespan and this also affects the accuracy of the sensor.

For the mentioned reasons, the gas sensor installed in the gas detectors should be periodically re-calibrated for the accuracy of sensor operation.