Week 13 (FYP 1)

LITERATURE REVIEW 

Journal 3

Today I want to share to all of you about sensor. What is gas sensor MQ-5, MQ-5 sensor pin diagram and working principle of gas sensor MQ-5.

What is gas sensor MQ-5?

The Grove - Gas Sensor (MQ-5) module is useful for gas leakage detection (in home and industry). It is suitable for detecting H2, LPG, CH4, CO, and Alcohol. Due its high sensitivity and fast response time, measurements can be taken as soon as possible. The sensitivity of the sensor can be adjusted by using the potentiometer.  

MQ-5 sensor pin diagram

Working principle of gas sensor MQ-5 

This sensor has a sensitive filament made of SnO2. In this presenceof clean air, this filament tends to have lower electrical conductivity. When a combustible gas such as LPG is introduced, the filament's conductivity rises, and the amount of change in it's conductance/resistance can be used to indicate the equivalent gas concentration. This effect tends to be particularly pronounced at higher temperatures, and resisitive heating element is present as well. SnO2 is particularly sensitive to Methane, Butane and Propane, but also sensitive to other combustible gases as well.  

Credit to: Akshay and Ashwin (July 2017) "Gas Leakage Detector using Arduino UNO Microcontroller". 

I hope after reading what have I been share, you guys can get more input about it. TQ for reading my blog and have a nice day =) =)