Principle Introduction:
Winsen Electronics, as a professional gas sensing solution provider with over 30 years gas sensor manufacture experience, offers Ozone O3 gas sensor.
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.

Applications :
It is widely used in domestic ozone concentration alarm, industrial ozone concentration alarm and portable ozone concentration detector.

Technical parameters :

Tips:For more parameter information, please refer to the latest manual provided by salesman.

Model			MQ131
Sensor Type			Semiconductor
Standard Encapsulation			Plastic cap
Target Gas			Ozone
Detection range			10～1000ppb Ozone
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	34Ω±3Ω (room tem.)
	Heater consumption	PH	≤900mW
	Sensitivity	S	Rs(in air)/Rs(in 200ppb O3)≥2
	Output Voltage	△Vs	≥1.0V(in 200ppb O3)
	Concentration Slope	α	≤0.6(R500ppb/R100ppb O3)
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

Reference Circuit :

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