Many clients usually use the high-concentration gases for test upon acceptance. This is a method lacking precision and which can cause damage of the instrument. The test scope of the combustible gas detector ranges from 0 LET to 100% LEL. In other words, under the lower explosive limit (taking methane for example, which ranks 0 to 5% vol), the lighter's gas is the high-purity butane, which is far beyond the detection scope of the combustible gas detector.
When the lighter's gas is used for test, the sensor will suffer two-fold to three-fold impact or even impact of a higher concentration. If the impact is light, the chemical activity of sensor components will attenuate or suffer inactivation in the early period, thus resulting in a decline to the detection precision and sensitivity. If the impact is serious, the platinum wire might be burned out and the sensor will be abandoned. Of special note is that the sensor failure caused by the high-concentration gas impact. The manufacturer provides no quality guarantee and the client should change it at his own expense.

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.

What is the test and calibration of gas detector? Firstly, a zero gas and a standard concentration gas is used to calibrate the instrument, then a standard curve is obtained to be stored in the instrument. When measuring, the instrument compares the electrical signals produced by the detected gas concentration to the stored standard curve, and then calculates the accurate gas concentration value.

An oxygen gas detector is a portable oxygen detector powered by battery. Based on the measuring principle of electrochemical sensor, it adopts imported high performance electrochemical oxygen sensor and SCM technology to realize the calculation and display of oxygen value. The oxygen gas detector can be used for mobile detection of oxygen content in flue gas of air separation oxygen production, building materials, chemical process and combustion system, it can also be used for off-line detection of oxygen content in protective gas of material sintering and electronic power industry. The built-in high-efficiency, low-power sampling pump is especially suitable for gas sampling detection in negative pressure process.

Installation of the flammable gas detector include two parts: installation of the detector and installation of the controller. Installation of the detector: Once the fixed detector is installed in place, its position can't be changed easily. So the following problems shall be considered before installing the detector: