Feb 27, 2018 · MQ135 is available as a module or as just the sensor alone. If you are trying to only detect (not measuring PPM) the presence of a gas, then you can buy it as a module since it comes …

What is an MQ135 Air Quality Sensor? An MQ135 air quality sensor is one type of MQ gas sensor used to detect, measure, and monitor a wide range of gases present in air like ammonia, alcohol, …

Structure and configuration of MQ-135 gas sensor is shown as Fig. 1 (Configuration A or B), sensor composed by micro AL2O3 ceramic tube, Tin Dioxide (SnO2) sensitive layer, measuring electrode …

It is widely used in air quality monitoring systems, industrial applications, and safety systems to ensure a healthy and safe environment. The sensor provides an analog output that can be easily interfaced …

Learn how to interface the MQ-135 Gas Sensor with Arduino. This guide includes wiring diagrams, code examples, and practical tips for measuring air quality and gas levels.

MQ-135 gas sensor module features both analog output fetched from its AO pin and digital output fetched from its DO pin. The analog output voltage lies between 0-5V where the output voltage …

Dec 10, 2025 · Learn how to connect MQ135 air quality sensor with Arduino. Step-by-step wiring, working principle, and Arduino code for beginners.

Jan 10, 2021 · The MQ135 is a semiconductor gas sensor widely used for detecting air quality and harmful gases. It belongs to the MQ sensor family, which uses SnO₂ (tin dioxide) as the sensing …

Mar 13, 2024 · The MQ135 can detect and measure a wide range of gases around it and present the output in the form of digital or analogue values. In this article, we will commence by providing a …

The mq135 gas sensor, also known as the air quality sensor, is designed to detect the presence of a wide range of gases in the surrounding environment. It is commonly used in applications related to …