MQ3 Alcohol Gas Sensor

0 reviews  (0/5 ) 0 reviews  •  Write a review
Product Code: 91445
Availability: SOLD OUT Views: 43322
Product Description
  • High sensitivity to Alcohol Gas
  • Long life and low cost
  • Simple drive circuit

Shipping Options to United States

Select Country:
* Region / State:

MQ3 Alcohol Gas Sensor info

MQ3 Alcohol Gas Sensor 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.


MQ3 Alcohol Gas Sensor - General Specifications

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


MQ3 Alcohol Gas Sensor - Technical Specifications

  • Detection Gas: Alcohol Gas
  • Concentration: 0.4mg/L – 4mg/L
  • Supply Voltage: <24V
  • Heater Voltage: 5.0V ± 0.2V (High), 1.5V ± 0.1V (Low)
  • Load Resistance: Adjustable
  • Heater Resistance: 31Ω ± 3Ω
  • Heater Consumption: <900mW






MQ-3 Datasheet


There are no reviews for this product.
Write a review Your Name:

Your Review:Note: HTML is not translated!

Rating: Bad           Good

Enter the code in the box below: