The mq-135 air quality sensor is a risky gas detection module that includes a digital readout that tells you how much hazardous gas is present in the air. The module can be used to help report air quality levels, and help identify problems with air quality.
From our blog:
The mq-135 air quality sensor is a dangerous gas detection module for the arduino that functions as an alert if air quality is outside of safe range. The module includes a built-in microphone and speaker for monitoring air quality and is equipped with a built-in hazard reducer to protect from air pollution.
this is a how-to on how to use an air quality sensor to detect hazardous gas conditions on an arduino. The sensor can also be used to detect other air quality sensors in the same way, so that you can warn your users of the risks of air quality problems.
the mq-135 smoke gas air quality sensor module is a great sensor for an arduino. It uses wifi to detect air quality in your room, and allows you to control notifications and even set up-updates. The sensor also includes a built-in detector that can detect small air quality problems that can be quickly and easily fixed.