In-situ gage instrument of gas detector

The utility model discloses an in-situ gage instrument of gas detector, which comprises a gas bottle for storing high pressure component gas, a gas stability valve connected with the high pressure gas bottle by the gas transmission pipelines, a cover container, a high-speed ration electro-magnetic valve connected with the component gas stability valve by the gas transmission pipelines which can transmit the component gas into the cover container, a micro-processing system connected with the high-speed ration electro-magnetic valve electrically, and a power supply module that supplies power to the micro-processing system and the high-speed ration electro-magnetic valve. The in-situ gage instrument of gas detector in the utility model pours component gas of some volume into the container by controlling the time and frequency of close and open of the ration electro-magnetic valve, therefore detecting the gas annunciator effectively. The gage instrument has the advantages of small volume, power supply by batteries, provision of component gas by the high pressure gas bottle, suitable for a plurality of classes of component gas, little power consumption and low cost.