MQ9 Gas Sensor: How To Calibrate & Use Gas Sensors w/ Arduino [w/ Code]

In this tutorial, you will learn how to calibrate and use MQ9 gas sensor with an Arduino board.
What You Will Learn:
What the gas sensor is and how it works.
Comparison of different gas sensor models
How MQ9 gas sensor works
Using MQ9 gas sensor with Arduino
MQ gas sensor series are the most common gas sensors available. These sensors have various models for detecting various gases. Here we will get to know how to hookup MQ9, but they all work almost in the same way.
Text Version of this tutorial : electropeak.co...

[@hamedzaheri7050]

دمت گرم بابت ویدئو و تلاشت که هم گرافیک قشنگی ساختی و هم خوب توضیح دادی. تعجب نکن از رو لحجه باحالت فهمیدم ایرونی هستی. ولی باز دمت گرم ، میدونم چقدر ساخت همچین ویدئویی زمان بره

[@AsaphAhouandjinou]

Hello
Very nice tutorial ✨
Please in the calibration code, how to procede when calibrating it for CO gas

[@hamedsabaghy5354]

خیلی عالی
Very great
Thank you

[@hosseinpeste9213]

The Best

[@feliwein_cc]

how do you feed 1.4v with the pcb sensors?

[@akmalfirdaus1953]

Hi. I'm a bit confused about how to convert this ADC Analog to PPM with MQ3 Sensor.. The default result is about 120 - 200 clean air reading. I just dont know how to calculate it, or if there any formula to get the right PPM, please tell me. I plan to use MQ3 for detect Ethylene gas. Thank you.

[@akmalfirdaus1953]

i get the result from your tutorial
sensor_volt = 0.73
RS_ratio = 5.87
RS/R0 = 6.45

[@joczarmoral1892]

what specific arduino uno model was used?

[@joanamarieantig3700]

What unit value does mq9 shows in a monitor? Is it in ppm already?

[@avppr3451]

1 mg/L is 1 ppm...

[@luna_lunix]

24-48 hours to warm up and get ready to use. This cant be serious

[@baseladams280]

This is a MOS sensor and not an electrochmical sensor. YOu can finde more infos here: ruclips.net/video/hX5kLqPe8nc/видео.html

[@imanshojaee5109]

Why do I think you're Persian?