1.Measurement Gas:Natural gas,coal gas,methane, combustible gas. 2.Response Time:<1 sec 3.Sensitivty:<5PPM 4.Semiconductor Combustible gas detector AR8800A+ SPECIFICATIONS Warm up Period<110 secSensitivty≤5PPMAlarm IndicationLED lightResponse Time≤1 secMeasurement GasNatural gas,coal gas,methane ,and combustible gasSensitivity adjustable√Low Battery Indication√Sensor SemiconductorOperating ...