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Alcohol Gas Sensor MQ-3

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Product Code: 91181
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Gas Sensor |
Product Description
  • High sensitivity to Alcohol Gas
  • Long life and low cost
  • Simple drive circuit
$7.00
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Alcohol Gas Sensor MQ-3 info

About the Product

 

Alcohol Gas Sensor MQ-3 detects the concentrations of alcohol gas in the air and ouputs its reading as an analog voltage. The sensor can measure concentrations of 0.04mg/L to 4mg/L. The concentration sensing range is suitable for breathalyzers. The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.

Connecting five volts across the heating (H) pins keeps the sensor hot enough to function correctly. Connecting five volts at either the A or B pins causes the sensor to emit an analog voltage on the other pins. A resistive load between the output pins and ground sets the sensitivity of the detector. The resistive load should be calibrated for your particular application using the equations in the datasheet, but a good starting value for the resistor is 200 kΩ.

 

Product Description

 

  • High sensitivity to Alcohol Gas
  • Long life and low cost
  • Simple drive circuit

 

Technical Specifications

 

  • Detection Gas: Alcohol Gas
  • Concentration: 0.4mg/L – 4mg/L
  • Supply Voltage: <24V
  • Heater Voltage: 5.0V ± 0.2V
  • Load Resistance: Adjustable
  • Heater Resistance: 31Ω ± 3Ω
  • Heater Consumption: <900mW

 

Videos

 

 

 

Documents

 

Alcohol gas sensor MQ-3 datasheet

 

References

 

Pololu Web Site:

https://www.pololu.com/product/1634

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Tags: Pololu, Gas, Sensor, Alcohol