For different gases, the use of gas alarm sensors is different. To carry out a specific measurement task for a certain gas, we must first consider which principle of the detector sensor, which requires analysis of many factors before determine. Because, even if it is to measure the same physical quantity, there are many kinds of principle sensors available for selection. Which kind of principle sensor is more suitable, then we need to consider the following specific problems according to the characteristics of the measured and the use conditions of the sensor: the size of the range; The measured position of the sensor volume requirements; measurement method for contact or non-contact; signal extraction method, wired or non-contact measurement; sensor source, domestic or imported, the price can withstand, or self-developed.
The flammable gas alarm device is not equipped with the adjustment and control part of the sample gas process technology conditions. At the same time, it does not consider the environmental conditions of the flammable gas alarm device at all. A complete set of gas path systems and external supporting equipments that are internally matched form a relatively complete set of chemical process flow. The internal conditions of the sample gas are adjusted and controlled within the alarm to achieve the purpose of normal and stable work of the sensors. This is The alarm can get the assurance of accurate measurement data.
Flammable gas alarm "diffusion" or "sample extraction" type monitoring equipment. Once opened, combustible gas alarms are continuously monitored and the air flow passes through the diffuser panel to the sensor. Normal air flow is sufficient to deliver the gas sample to the sensor, which responds to the measured gas concentration. Diffusion operation monitors only the gas that surrounds the alarm momentarily. Sampling farther away from the alarm can only be through the flow adapter and optional hand-held alarm
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