Zero drift in combustible gas detectors
Zero drift is one of the common issues with combustible gas detectors. During prolonged use, the internal sensing elements of the sensor may be affected by environmental factors (such as changes in temperature and humidity) or gradual changes in the performance of electronic components. This can cause the output signal to deviate from the initially set zero point in clean air without the presence of combustible gas, resulting in a non-zero display on the detector.
★ Solution: Recalibrate the zero point value in clean air.
Residual combustible gas in the sensor protective cover
During previous detection tasks, the sensor protective cover may have adsorbed some combustible gas molecules. Even when the detector is moved to a normal environment, these residual combustible gases may slowly release and be detected by the sensor, causing the reading to be non-zero.
★ Solution: Remove the sensor protective cover and clean off any dust.
Sensor aging
The sensor is the core component of a combustible gas detector. Over time, the sensitive materials inside the sensor gradually lose their activity, leading to reduced sensitivity in detecting combustible gases. As a result, the detector may display a non-zero reading even in a normal environment.
★ Solution: Replace the detector with a new combustible gas detector.
Slow response of combustible gas detectors
A slow response during calibration is generally caused by sensor aging. Prolonged exposure to harsh environments inevitably leads to the aging and failure of components, particularly catalytic materials, causing the catalytic combustion reaction of the detection element to become progressively slower. Additionally, improper range adjustment may also result in a slow response or inaccurate readings.
