Description

Sensitive material of MQ131 gas sensor is a semiconductor metal oxide with high 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 gases, such as Cl2, NO2 etc. It responses oppositely to organic interference gases, compared with O3.

Application

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

Features

It has good sensitivity to ozone in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.

Specifications

Model			MQ131
Sensor Type			Semiconductor
Standard Encapsulation			Plastic cap
Target Gas			Ozone
Detection range			10～1000ppb Ozone
Standard Circuit Conditions	Loop Voltage	Vc	5.0V±0.1V DC
	Heater Voltage	VH	5.0V±0.1V AC or DC
	Load resistance	RL	Adjustable
Sensor character under standard test conditions	Heater Resistance	RH	35Ω±3Ω (room temp.)
	Heater consumption	PH	≤800mW
	Sensitivity	S	Rs(in 200ppb O3)/Rs(in air)≥2
	Output Voltage	△Vs	≥1.0V(in 200ppb O3)
	Concentration Slope	α	≤0.6(R100ppb/R500ppbO3)
Standard test conditions	Temp.  Humidity		20℃±2℃；55%±5%RH
	Standard test circuit		Vc:5.0V±0.1V； VH: 5.0V±0.1V
	Preheat time		Over 48 hours
Oxygen content	21% (not less than 18%, (oxygen concentration will affect the initial value, sensitivity and repeatability of the sensor, please consult when using it under low oxygen concentration)
Life span	5 years

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.