MQ-9, a carbon monoxide sensor module, gas sensor

The main technical parameters:
Product Type: MQ-9
Product Type: Semiconductor gas sensors
Standard package: bakelite
Detection of gases: carbon monoxide, combustible gases
Detection concentration: 10-1000ppmCO; 100-10000ppm combustible gas
Circuit voltage (Vc): ≤ 10V DC
Heating voltage (VH): 5.0 V ± 0.2 V AcorDC 1.5 V ± 0.1 V ACorDC (Low)
Heating time (TL): 60 ± 1S (high) 90 ± 1S (low)
Load resistance (RL): adjustable
Heating resistance (RH): 31Ω ± 3Ω (room temperature)
Heating power (PH); about 350mW
Sensitive body surface resistance (Rs): 2KΩ-20KΩ (in100ppmCO)
Sensitivity (S): Rs (in air) / Rs (100ppmCO) ≥5
Concentration slope (?):? 0.6 (R300 ppm / R100 ppm CO)
Temperature, humidity: 20 ℃ ± 2 ℃; 65% ± 5% RH
VH (low): 1.5V ± 0.1V; VH (high): 5.0V ± 0.1V; standard test circuit: Vc: 5.0V ± 0.1V;
Warm-up time: not less than 48 hours