Alcohol and ethanol sensor MQ-3

This analog gas sensor has a small heating element with an electrochemical sensor. It is suitable for use in buildings and can only provide an accurate reading after the warm-up phase has ended.

Features
- compatible with Arduino
- 100 - 10000 ppm Measuring range
- high sensitivity (adjustable via potentiometer)
- fast response time
- Evaluation of measured values by the microcontroller (analog)
- Threshold setting possible (digital)
- < 1 s Response time
- < 30 s Response time after switching on
- < 150 mA Heating current consumption
- 5 V (+/- 0.2 V) Heating current voltage
- 750 mW heating power

Measurable substances
- Ethanol
- Alcohol via the hydrogen concentration

Connections
- VCC: Power supply 5V
- GND: Ground connection
- AOUT: Analog output
- DOUT: Digital output

Dimensions
- L x W x H: 32 x 21 x 20 mm

Note: The sensor gets hot during use!

Dimensions
Length: 3.2cm
Width: 2cm
Height: 1.56cm