MQ-9 co methane gas sensor is used in gas detecting equipment for carbon monoxide and CH4,LPG in family and industry or car.
MQ-9 co methane gas sensor with high sensitivity
FEATURES
1. High sensitivity to carbon monoxide and CH4, LPG,
2. Stable and long life.
SPECIFICATIONS
A. Standard work condition
Symbol | Parameter name | technical condition | Remark |
Vc | circuit voltage | 5V±0.1 | AC or DC |
VH (H) | Heating voltage (high) | 5V±0.1 | AC or DC |
VH (L) | Heating voltage (low) | 1.4V±0.1 | AC or DC |
RL | Load resistance | Can adjust |
|
RH | Heating resistance | 33Ω±5% | Room temperature |
TH (H) | Heating time (high) | 60±1 seconds |
|
TH (L) | Heating time (low) | 90±1 seconds |
|
Ps | Heating consumption | Less than 340mw |
|
B. Environment conditions
Symbol | Parameters | Technical conditions | Remark |
Tao | Using temperature | -20°C-50°C |
|
Tas | Storage temperature | -20°C-50°C | Advice using scope |
RH | Relative humidity | Less than 95%RH |
|
O2 | Oxygen concentration | 21%(stand condition) the oxygen concentration can affect the sensitivity characteristic | Minimum value is over 2% |
C. Sensitivity characteristic
symbol | Parameters | Technical parameters | Remark |
Rs | Surface resistance Of sensitive body |
2-20k | In 100ppm Carbon Monoxide |
a(300/100ppm) | Concentration slope rate | Less than 0.5 | Rs (300ppm)/Rs(100ppm) |
Standard working condition | Temperature -20°C±2°C relative humidity 65%±5% RL:10KΩ±5% | ||
Vc:5V±0.1V VH:5V±0.1V VH:1.4V±0.1V | |||
Preheat time | No less than 48 hours | Detecting range:20ppm-2000ppm carbon monoxide 500ppm-10000ppm CH4 500ppm-10000ppm LPG
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