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Semiconductor Ozone Sensor MQ131（Low Concentration）

Summary:

Sensitive material of MQ131 gas sensor is WO₃, which with lower conductivity in clean air. When the ozone gas exists, the sensor's conductivity gets lower along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ131 ozone gas sensor has high sensitivity to ozone, and also has sensitivity to strong oxide such as Cl₂, NO₂ &etc. It responses oppositely to organic interference gases.

Feature:

* High precision

* High sensitivity

* Short response time

* Good anti-interference ability

* High resolution

* Wide linear range

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PARAMETER

Specification Product Size

Technical Data Sheet

Model			MQ131
Sensor Type			Semiconductor
Standard Encapsulation			Plastic cap
Target Gas			Ozone
Detection range			10～1000ppb Ozone
Standard Circuit Conditions	Loop Voltage	V_C	≤24V DC
	Heater Voltage	V_H	5.0V±0.1V AC or DC
	Load Resistance	R_L	Adjustable
Sensor character under standard test conditions	Heater Resistance	R_H	34Ω±3Ω (room temp.)
	Heater consumption	P_H	≤900mW
	Sensitivity	S	Rs(in 200ppb O3)/Rs(in air)≥2
	Output Voltage	△Vs	≥1.0V(in 200ppb O₃)
	Concentration Slope	α	≤0.6(R100ppb/R500ppb O₃)
Standard test conditions	Temp. Humidity		20℃±2℃；55%±5%RH
	Standard test circuit		V_C:5.0V±0.1V； V_H: 5.0V±0.1V
	Preheat time		Over 48 hours

MQ131（Low-Concentration）2.png

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