Description

MH Sensor Series

This is an easy to use sensor module you can use to sense the amount of contaminant in surrounding air, giving the reading of air quality index. This is a famous sensor module commonly used with Arduino to build smoke detectors, IoT environment monitoring and smart agricultural projects.

Note : This sensor works with both digital and analog mode. You can connect analog output (AO) to get the air quality index reading (conversion required), or you can connect the digital output (DO) to sense the threshold of air quality. Adjust the potentiometer (a.k.a. trimmer) to set the digital output (DO) sensitivity.

Sensitive to Gas

• Ammonia (NH3)
• Nitrogen oxides (NOx)
• Benzene (C₆H₆)
• Carbon dioxide (CO2)
• Alcohol
• Smoke

Common Features

• Operating voltage : 5V
• Output type : DIGITAL and ANALOG
• Preheat duration : 20s
• Adjustable sensitivity via potentiometer
• Comes with LED indicators for POWER and OUTPUT
• Fixed screw holes for easy installation
• Model : FC-22

Wiring

Attachments

• Information about MQ gas sensor series
• Introduction to Gas Sensors: Construction Types and Working
• Tutorial with code : Arduino And MQ 135 Gas Sensor With Arduino Code – Arduino Project Hub
• Tutorial : Interfacing of MQ135 Gas Sensor with Arduino – MicrocontrollerLabs
• Datasheet – MQ-135