MQ2 Analog Gas Sensor Brick(EF04028)
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.
Products Link
ELECFREAKS Octopus Smoke Sensor MQ-2 Brick
Characteristics
Standard 3-pin GVS port is easy to plug.
Specification
| Item | Parameter |
|---|---|
| SKU | EF04028 |
| Connections Type | Analog |
| Pins Definition | S-Sigal V-VCC G-GND |
| Working Voltage | 5V |
| Size | 38x27mm |
Size：
Outlook and Dimension
Quick to Start
Materials required and connections diagram
Connect to P1 port as the picture shows.
Take sensor:bit for example
Program as the picture shows
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.