Factors affecting the sensor of the gas detector

Update:11-05-2019
Summary:

The gas detector is an instrumentation tool for gas lea […]

The gas detector is an instrumentation tool for gas leakage concentration detection. It mainly uses sensors to detect the types of gases present in the environment. The gas sensors are sensors for detecting the composition and content of gases. Many environmental factors can affect the reading of gas detector sensors, including changes in pressure, humidity, and temperature. Changes in pressure and humidity affect the amount of oxygen actually present in the atmosphere.

Use a gas detector to detect toxic gas concentrations

Pressure change

If the pressure changes drastically (such as when passing through a gas plug), the gas detector sensor readings may be temporarily undulating and may cause the detector to sound an alarm. When the oxygen volume percentage is maintained at around 20.8% and the overall pressure drop is large, oxygen in the environment for breathing may become a hazard.

Humidity change

If the humidity changes significantly (such as when entering an outdoor humid air environment from an air-conditioned dry environment), the water vapor in the air will drive away the oxygen, causing the oxygen reading to cause a drop of up to 0.5%. Gas detector sensors are equipped with special filters to eliminate the effects of humidity changes on gas readings. This effect will not be detected immediately, but it will slowly affect the degree of oxygen over several hours.

temperature change

The sensor is temperature compensated. However, if the temperature fluctuates drastically, the gas detector sensor reading may drift. The instrument should be calibrated at the job site to minimize the effects of temperature changes on the readings.

When cleaning the gas detector, it is necessary to clean the outer surface of the instrument with a damp cloth. It is strictly forbidden to use detergent. Because the cleaner may also have silicon, it can damage the combustible gas sensor. When storing, choose a place that is as safe and dry as possible. The storage temperature ranges from 18 °C to 30 °C. Before using the gas detector, the calibration of the instrumentation must be reproduced. During the transportation process, the protective gas detector should be used with a transport package with appropriate gaskets to prevent accidental damage to the instrument during transportation.