- • Detection Gas: Dual gas, Carbon Monoxide & Methane
- • Detection Range: 10～500ppm CO,300～10000ppm CH4
- • Application: It is widely used in domestic CO gas leakage alarm, industrial CO gas alarm and portable CO gas detector.
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Principle Introduction:
As a professional gas sensing solution provider with over 30 years gas sensor manufacture experience, offers semiconductor gas sensor for CO & Methane use.
Sensitive material of MQ-9B gas sensor is SnO2, which with lower conductivity in clean air. It detects carbon monoxide (1.5V) by method of cycle high and low temperature. At high temperature (5.0V), it can detect CO as well as clean the other gases adsorbed at low temperature. The sensor’s conductivity gets higher along with the CO and CH4 gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
Technical parameters :
Tips:For more parameter information, please refer to the latest manual provided by salesman.
| Model |
KLS26-MQ-9B |
| Sensor Type |
Semiconductor |
| Standard Encapsulation |
Plastic, Metal cap |
| Target Gas |
Carbon Monoxide, Methane |
| Detection range |
10～500ppm CO,300～10000ppm CH4 |
| Standard Circuit Conditions |
Loop Voltage |
Vc |
≤10V DC |
| Heater Voltage |
VH |
5.0V±0.1V AC or DC（High tem.） 1.5V±0.1V AC or DC（Low tem.） |
| Heater Time |
TL |
60S±1S（High tem.） 90S±1S（Low tem.） |
| Load Resistance |
RL |
Adjustable |
| Sensor character under standard test conditions |
Heater Resistance |
RH |
29Ω±3Ω（room tem.） |
| Heater consumption |
PH |
≤900mW |
| Sensitivity |
S |
Rs(in air)/Rs(in 150ppm CO)≥5 Rs(in air)/Rs(in 5000ppm CH4)≥3 |
| Output Voltage |
Vs |
2.5V ～ 4.3V (in 150ppm CO) 2.0V ～ 4.0V (in 5000ppm CH4) |
| Concentration Slope |
α |
≤0.6(R300ppm/R50ppm CO) ≤0.6(R5000ppm/R1000ppm CH4) |
| Standard test conditions |
Tem. Humidity |
20℃±2℃；55%±5%RH |
| Standard test circuit |
Vc：5.0V±0.1V；VH（High tem.）：5.0V±0.1V；VH（Low tem.）：1.5V±0.1V |
| Preheat time |
Over 48 hours |
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