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Model: gh-310Output signal: AnalogCategory: gasUse:Monitor coal mine gas 12 Industry's methaneGas monitoring 34 supplied by natural gas fuel automobile safety monitoringElectrical parameters:Operating voltage: DC voltage 9 - 20 vQuiescent current: 10 maOutput level: high 5v / 0v lowDetection area: 10 m:Alarm gas concentration: 2000 ppm or more