Generally speaking4-in-1 gas detectorIt is divided into standard and customized. Among them, the standard four-in-one gas detector mainly detects: flammable gas, oxygen, hydrogen sulfide, carbon monoxide; The customized model depends on the type of gas to be detected in the customer's use environment, and can be customized according to the needs (note: some are different).Gas sensorThere will be mutual interference between them, so it is necessary to consult clearly).