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Winsen Electronics manufacture air quality sensor and VOC sensor MQ135 for IAQ monitor application.
Sensitive material of MQ135 gas sensor is SnO2, which with lower conductivity in clean air. When target pollution gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
MQ135 gas sensor has high sensitivity to ammonia gas, sulfide, benzene series steam, also can monitor smoke and other toxic gases well. It can detect kinds of toxic gases and is a kind of low-cost sensor for kinds of applications.
Applications :
It is widely used in domestic gas alarm, industrial gas alarm and portable gas detector.
Technical parameters :
Tips:For more parameter information, please refer to the latest manual provided by salesman.
| Model |
MQ135 |
| Sensor Type |
Semiconductor |
| Standard Encapsulation |
Bakelite, Metal cap |
| Target Gas |
ammonia, sulfide, benzene series steam |
| Detection range |
10～1000ppm( ammonia gas, toluene, Hydrogen, smoke) |
| Standard Circuit Conditions |
Loop Voltage |
Vc |
≤24V DC |
| Heater Voltage |
VH |
5.0V±0.1V AC or DC |
| Load Resistance |
RL |
Adjustable |
| Sensor character under standard test conditions |
Heater Resistance |
RH |
29Ω±3Ω（ room tem.） |
| Heater consumption |
PH |
≤950mW |
| Sensitivity |
S |
Rs(in air)/Rs(in 400ppm H2)≥5 |
| Output Voltage |
Vs |
2.0V～4.0V（in 400ppm H2） |
| Concentration Slope |
α |
≤0.6(R400ppm/R100ppm H2) |
| Standard test conditions |
Tem. Humidity |
20℃±2℃；55%±5%RH |
| Standard test circuit |
Vc:5.0V±0.1V； VH: 5.0V±0.1V |
| Preheat time |
Over 48 hours |
Datasheet Download
