How to solve the problem that low concentration gas cannot be detected
1. Check whether the air pump of the gas detector is working normally. Use your finger to block the air inlet for 5 seconds. If it is normal, you will feel obvious attraction. If there is no attraction, check whether the air inlet is blocked.
2. Calibrate the zero point with nitrogen or calibrate the zero point in clean air, and check after calibration.
3. After the zero point is calibrated, if the measured gas cannot be detected, it is necessary to restore the factory settings of the gas detector.
4. The above steps have been performed, but it cannot be detected. It is necessary to confirm whether there is a gas to be measured on site, or the concentration of the gas to be measured is really low, and cannot be detected if it is lower than the minimum detection accuracy of the gas sensor.
