Sensitive material of MQ131 gas sensor is SnO2 which with lower conductivity in clean air. When Ozone gas appears, the sensor’s conductivity is higher along with the gas concentration rising. Please use simple electric circuit, Convert change of conductivity to correspond output signal of gas concentration.
MQ131 gas sensor has high sensitivity to Ozone, also sensitive to CL2, NO2, etc.
Character:
* Good sensitivity to Ozone in wide range
* High sensitivity to Ozone
* Long life and low cost
* Simple drive circuit
Application:
* Domestic Ozone concentration overload Detector
* Industrial Ozone concentration overloads Detector
* Portable Ozone concentration overloads Detector
Technical Data:
Model No.
|
MQ131
| ||
Sensor Type
|
Semiconductor
| ||
Standard Encapsulation
|
Bakelite (Black Bakelite)
| ||
Detection Gas
|
Ozone
| ||
Concentration
|
10-1000ppb
| ||
Circuit
|
Loop Voltage
|
Vc
|
≤24V DC
|
Heater Voltage
|
VH
|
5.0V±0.2V AC or DC
| |
Load Resistance
|
RL
|
Adjustable
| |
Character
|
Heater Resistance
|
RH
|
31Ω±3Ω（Room Tem.）
|
Heater consumption
|
PH
|
≤900mW
| |
Sensing Resistance
|
Rs
|
50KΩ-500KΩ(in 100ppb O3)
| |
Sensitivity
|
S
|
Rs(in air)/Rs(in 50ppb O3)≥3
| |
Slope
|
α
|
≤0.6(R500ppb/R100ppb O3)
| |
Condition
|
Tem. Humidity
|
20℃±2℃；65%±5%RH
| |
Standard test circuit
|
Vc:5.0V±0.1V；
VH: 5.0V±0.1V
| ||
Preheat time
|
Over 48 hours
| ||
