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Semiconductor Alcohol Sensor MQ303B

Summary:

The gas sensitive material used in the MQ303B gas sensor is a semiconductor material with low conductivity in clean air. When there is alcohol vapor in the sensor environment, the electrical conductivity of the sensor increases with the increase of the concentration of alcohol gas in the air. A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the concentration of the gas.

Feature:

* High sensitivity
* Quick response recovery
* Long life
* Low power consumption
* Low cost
* Small size

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APPLICATION

Vehicle Alcohol Test

The picture shows a common "ignition interlock system" with an alcohol detection function in the United States. This lock is connected to the ignition system of the car. Before ignition, the driver must blow air to ensure that the alcohol concentration in the body does not exceed the standard. and the car can start.

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Alcohol Detector

Strengthen the punishment of drinking and driving in all the country to reduce the vicious traffic accidents caused by drunk driving. This involves testing a person's alcohol level and using equipment to do the testing. An alcohol detector is an effective tool for measuring the alcohol content in the human body.

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Other Detector

Formaldehyde detector is an instrument for detecting formaldehyde. Generally, semiconductor sensors and electrochemical sensors are used to realize the rapid semi-quantification of formaldehyde in indoor air on the spot, which is characterized by simple structure, small size, intuitive,easy to carry and use.

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PARAMETER

Specification Product Size

Technical Data Sheet

Model			MQ303B
Sensor Type			Semiconductor
Standard Encapsulation			Metal Cap
Target Gas			Alcohol
Detection range			20~500ppm alcohol
Standard Circuit Conditions	Loop Voltage	V_C	≤6V DC
	Heater Voltage	V_H	0.9V±0.1V AC or DC
	Load Resistance	R_L	Adjustable
Sensor character under standard test conditions	Heater Resistance	R_H	4.0Ω±0.5Ω (room temp.)
	Heater consumption	P_H	≤140mW
	Zero point	V₀	0.01-0.45V
	Sensitivity	V_S	1.0-2.5V(125ppm alcohol)
	Concentration Slope	α	≤0.6(R_300ppm/R_50ppm alcohol)
Standard test conditions	Temp. Humidity		20℃±2℃；55%±5%RH
	Standard test circuit		V_C:3.0V±0.1V V_H:0.9V±0.1V
	Preheat time		Not less than 48 hours

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RELATED PRODUCTS

As a pioneer in gas sensor based solutions with the advanced processes, technologies and products, Winsen offers a wide range of gas sensors:

MEMS Alcohol Sensor ZM03

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How long is the delivery time?

1-7 days after received payment