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Application
Model No.
MQ-9
Sensor Type
Semiconductor
Standard Encapsulation
Bakelite
Detection Gas
CO and combustible gas
Concentration
10-1000ppm CO
100-10000ppm combustible gas
Circuit
Loop Voltage
Vc
≤10V DC
Heater Voltage
VH
5.0V±0.2V ACorDCHigh
1.5V±0.1V ACorDCLow
Heater Time
TL
60±1SHigh90±1SLow
Load Resistance
RL
Adjustable
Character
Heater Resistance
RH
31Ω±3ΩRoom Tem.
Heater consumption
PH
≤350mW
Sensing Resistance
Rs
2KΩ-20KΩ(in 100ppm CO )
Sensitivity
S
Rs(in air)/Rs(100ppm CO)≥5
Slope
α
≤0.6(R300ppm/R100ppm CO)
Condition
Tem. Humidity
20±265%±5%RH
Standard test circuit
Vc:5.0V±0.1V
VHHigh: 5.0V±0.1V
VHLow: 1.5V±0.1V
Preheat time
Over 48 hours
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