MQ-7 CO gas sensor carbon monoxide sensor module

Specification
Product Type: Semiconductor gas sensor
Standard package: plastic
Detection of gases: carbon monoxide
Detection concentration: 10-1000ppmCO
Loop voltage: ≤ 10VDC
Heating voltage: 5.0 V ± 0.2 V ACorDC (high)
1.5V ± 0.1VACorDC (Low)
Heating time: 60 ± 1S (high) 90 ± 1S (low)
Load resistance: adjustable
Heating resistance: 31Ω ± 3Ω (room temperature)
Heating power consumption: ≤ 350mW
Sensitive body surface resistance: 2KΩ-20KΩ (in100ppmCO)
Sensitivity: Rs (in air) / Rs (100ppmCO) ≥5
Concentration slope: ≤0.6 (R300ppm / R100ppmCO)
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