MP-4 combustible gas sensor methane sensor planar semiconductor combustible gas sensor -71176

• Detection gas: methane, natural gas, biogas

• Detection concentration: 300 ~ 10000ppm (methane, natural gas)

• Loop voltage VC: ≤24V DC

• Heating voltage VH : 5.0V ± 0.1V AC or DC

• Load resistance RL: adjustable

• Heating resistor RH: 85Ω ± 15Ω (room temperature)

• Heating power consumption PH : ≤350mW

• Sensitive body resistance RS: 1KΩ～20KΩ (in 5000ppm methane)

• Sensitivity S : Rs (in air) / Rs (in 5000ppm methane) ≥ 5

• Concentration slope α: ≤0.6 (R5000ppm/R1000ppm methane)

• Temperature, humidity: 20 °C ± 2 °C; 55% ± 5% RH

• Standard test circuit: VC: 5.0V ± 0.1V; VH: 5.0V ± 0.1V

• Warm-up time: no less than 48 hours

• Oxygen concentration: 21% (not less than 18%, (oxygen concentration will affect the initial value of the sensor, sensitivity and repeatability, use at low oxygen concentration)

• Please consult when using)

• Life expectancy: 10 years

Note: The above figure shows the basic test circuit of the MP-4 sensor. The sensor requires two voltages to be applied: heater voltage (VH) and test voltage (VC). The VH is used to provide a specific operating temperature for the sensor, either DC or AC. The VRL is the voltage across the load resistor (RL) of the sensor in series. VC is the voltage for testing the load resistor RL and requires a DC power supply.