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