Gas Sensor MQ-4 Natural Gas Methane Detection Sensor

Specifications:
1) Gas:natural gas,Methane
2) Detection range: 300 to 10000 PPMM
3) Characteristics of gas: 5000 PPMM methane
4) Sensitivity: R in air/Rin typical gas >=5
5) Response time: <=10s
6) Recovery time: <=30s
7) Heat resistance: 31ohm +/- 3ohm
8) The heating current: <=180mA
9) The heating voltage: 5.0V +/- 0.2V
10) Heating power: <=900mW
11) Measure the voltage: <=24V

Working conditions:
1) Ambient temperature: -20? ~ + 55
2) Humidity: <=95%RH
3) Environmental oxygen content: 21%

Storage conditions:
1) Temperature: -20?~ +70
2) Humidity: <=70%RH