37. MQ2 Analog Gas Sensor Brick(EF04028)

37.1. Introduction

The analog gas sensor MQ2 is used in gas leakage detecting equipments in consumer and industry markets, this sensor is suitable for detecting LPG, i-butane, propane, methane ,alcohol, hydrogen, smoke. It is of high sensitivity and fast response, the sensitivity can be adjusted by the potentiometer.

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37.3. Characteristics

Standard 3-pin GVS port is easy to plug.

37.4. Specification

Item | Parameter :-: | :-: SKU|EF04028 Connections Type|Analog Pins Definition|S-Sigal V-VCC G-GND Working Voltage|5V Size|38x27mm

Size：

37.5. Outlook and Dimension

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37.6. Quick to Start

Materials required and connections diagram

Connect to P1 port as the picture shows.

Take sensor:bit for example

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Program as the picture shows

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Reference

Link：https://makecode.microbit.org/_KJVXj9Co2UXU

You can also download it directly below:

Result

Preheat it for 10 minutes after connections, detect the smoke by approaching the probes to the smoke while the returned value is almost stable. With the change of the smoke, the returned value gets bigger with the growing of the smoke concentration.

37.7. Relevant Cases

37.8. Technical File