What Affect the Readings of The Gas Detector?

Generally speaking, many environmental factors may affect the reading of gas detector sensors, such as the changes in pressure, humidity and temperature. Changes in pressure and humidity affect the actual amount of oxygen in the atmosphere.

Humidity Change
If the humidity changes obviously (such as changing from the air-conditioned dry environment to the outdoor humid air environment), the water vapor in the air will drive away oxygen, resulting in a drop of oxygen reading up to 0.5%. Gas detector sensors are equipped with special filters to eliminate the effect of humidity changes on gas readings. Such an effect is not immediately noticeable, but it slowly affects the degree of oxygen over several hours.

Pressure Change
If the pressure changes dramatically (such as passing through the gas plug), readings of the gas detector sensor may fluctuate temporarily, which may cause the detector to give an alarm. When the percentage of oxygen volume remains stable at about 20.8% and the whole pressure decreases dramatically, oxygen for breathing in the environment may become dangerous.

Temperature Change
The sensor is equipped with temperature compensation. Nevertheless, if the temperature fluctuates sharply, the sensor readings of the gas detector may still drift. Zero-calibration shall be made to the instrument on site to minimize the impact of temperature change on readings.

When cleaning the gas detector, wet cloth is often used to clean the external surface of the instrument. Cleaner is strictly prohibited because the cleaner may contain silicon, which can damage the flammable gas sensor. The gas detector shall be kept in a dry place under a temperature range of 18℃-30℃. Before using the stored gas detector, it shall be re calibrated again. In transportation, the package with proper padding shall be used to protect the gas detector, so as not to damage it in trans.