Analog Alcohol Sensor(MQ3)

INTRODUCTION

The analog gas sensor - MQ3 is suitable for detecting alcohol, this sensor can be used in a Breathalyser.It has a high sensitivity to alcohol and small sensitivity to Benzine. The sensitivity can be adjusted by the potentiometer.

Notice:The new version of analog sensor port pin mapping has been changed as the following two features.Please check the tips for changing sensor cable pin mapping while using the I/O Expansion shield. We will continue to update. For the inconvenience caused, please understand.

SPECIFICATION

·         Power supply: 5V

·         Interface type: Analog

·         High sensitivity to alcohol and small sensitivity to Benzine

·         Fast response and High sensitivity

·         Stable and long life

·         Simple drive circuit

·         Size: 36.4x26.6mm

DOCUMENTS

·         Wiki Doc           

·         Schematic

·         MQ-3 datasheet

SHIPPING LIST

·         Analog Gas sensor (MQ3) x1

·         Analog Cable x1

·         Acrylic Base(with nylon screws) x1

IMPROVEMENT LIST

·         Standard assembling structure (Times-of-5mm Center distance between four 3mm mounting holes)

·         Easily recognitive interfaces of sensors ("A" for analog and "D" for digital)

·         Icons to simplely illustrate sensor function 

·         High quality connector & potentiometer

·         Immersion gold surface