HANWEI ELETRONICS CO.,LTD
MQ-9
http://www.hwsensor.com
TECHNICAL DATA
MQ-9 GAS SENSOR
FEATURES * High sensitivity t...
HANWEI ELETRONICS CO.,LTD
MQ-9
http://www.hwsensor.com
TECHNICAL DATA
MQ-9 GAS SENSOR
FEATURES * High sensitivity to carbon monoxide and CH4,LPG.
* Stable and long life
APPLICATION They are used in gas detecting equipment for carbon monoxide and CH4,LPG in family
and industry or car.
SPECIFICATIONS
A. Standard work condition
Symbol Vc VH (H) VH (L)
Parameter name circuit
voltage Heating
voltage (high) Heating
voltage (low)
technical condition 5V±0.1 5V±0.1 1.4V±0.1
Remark AC or DC AC or DC AC or DC
RL Load resistance
Can adjust
RH TH (H) TH (L)
Heating resistance Heating time (high) Heating time (low)
33Ω ±5% 60±1 seconds 90±1 seconds
Room temperature
Ps Heating consumption Less than 340mw
b. Environment conditions
Symbol Tao
Tas RH O2
Parameters Using temperature
Storage temperature Relative humidity Oxygen concentration
c. Sensitivity characteristic
Technical conditions -20℃…+50℃ -20℃…+50℃
Less than 95%RH 21%(stand condition) the oxygen concentration can affect the sensitivity characteristic
Remark Advice using scope Minimum value is over 2%
symbol Rs
а (300/100ppm) Standard working condition Preheat time
Parameters Surface resistance Of sensitive body Concentration slope rate
Technical parameters
2-20k Less than 0.5
Remark In 100ppm Carbon Monoxide Rs (300ppm)/Rs(100ppm)
Temperature -20℃±2℃ relative humidity 65%±5% RL:10KΩ ±5% Vc:5V±0.1V VH:5V±0.1V VH:1.4V±0.1V
No less than 48 hours
Detecting range:20ppm-2000ppm carbon monoxide 500ppm-1000...