Nowadays, with the continuous enhancement of China's national strength and the increasing attention to environmental hygiene and testing, various kinds of gas detectors have been launched to detect whether the indicators of various gases are qualified. Through the gas detector can effectively detect the scene of a gas concentration 24 hours continuous on-line monitoring and temperature and humidity measurement, which plays an important role in the prevention of accidents. However, in general, the type and concentration of the detected gas are related, so the detection of a certain 1 of gases has a certain range. Can the gas detector be used outside the concentration detection range? The following is a brief introduction by yi yun Tian:

The gas detector cannot be used outside the concentration detection range.

For example, the 4 gas measured by the four-in-one gas detector is combustible gas, hydrogen sulfide, carbon monoxide and oxygen, and the detection range is as follows:

1. combustible gas (methane): between 10% and LEL-25 LEL, I .e. 0.5 methane -1.25 methane gas detector will alarm.

2. Hydrogen sulfide gas: gas detector alarms when it exceeds 10ppm.

3. Carbon monoxide gas: gas detector alarms when it exceeds 24ppm.

4. Oxygen: Gas detector alarms when it is less than 18.0%.

if the conventional measurement of the four-in-one gas detector exceeds the calibrated concentration detection range, it will cause serious consequences such as damage, failure, or burning of the gas detection probe (sensor).

another example is a combustible gas detector, whose detection range is 0-100% LEL. if it is used to detect an environment exceeding 100 LEL, the sensor may be burned if it is used in an environment exceeding 100 LEL.The toxic gas detector, working for a long time at a higher concentration will also cause damage to the sensor. Therefore, when the gas detector is in use, if the overrun signal is issued, the power switch should be turned off immediately to ensure the safety of the instrument.

To sum up, we can see that the gas detector can only be used within the calibrated concentration detection range to ensure The true and reliable measurement results of the detection alarm. And beyond the calibration of the concentration detection range, will be on the gas detection probe (sensor) damage failure, or burned and other serious consequences. In short, the gas detector can be effectively suppressed before the disaster, so that the accident that may become a disaster is controlled in advance, while protecting and ensuring the safety of industrial safety and operators, the gas detector needs to be selected in combination with the specific use environment and the required functions.