MQ-135 Air Quality Gas Sensor Module with LM393 Comparator
VAT inclusive; Computed calculations added locally.
Overview
The MQ-135 Gas Sensor Module is a practical solution for developing air-quality and gas-monitoring projects. It uses a tin oxide (SnO₂) semiconductor sensing element whose electrical resistance changes in response to certain gases and contaminants in the surrounding air. An onboard comparator circuit provides a convenient threshold-based output, while the adjustable sensitivity makes it easier to configure the module for different project environments. The module can be integrated into Arduino, Raspberry Pi, and other microcontroller-based systems for experimental air-quality monitoring and automation. Its compact design makes the MQ-135 suitable for smart-home prototypes, environmental sensing projects, IoT systems, ventilation monitoring experiments, and educational electronics applications.
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Product Technical Information
Technical Details
The MQ-135 Gas Sensor Module is designed for detecting changes in air composition associated with various gases and contaminants. At the heart of the module is an MQ-135 sensing element based on a tin oxide (SnO₂) semiconductor material. Its electrical characteristics change according to the surrounding gas environment.
The module includes an onboard comparator circuit that can provide a convenient threshold-based signal to a connected microcontroller. The sensitivity threshold can be adjusted using the onboard potentiometer, making the module useful for basic air-quality warning and automation experiments.
With support for popular microcontroller platforms, the MQ-135 can be used to develop air-quality monitoring systems, smart-home projects, IoT prototypes, ventilation control concepts, and educational gas-sensing experiments.
Applications
- Air-quality monitoring prototypes
- Indoor environmental sensing
- Smart-home automation
- IoT air-quality projects
- Ventilation monitoring experiments
- Environmental pollution monitoring prototypes
- Arduino and Raspberry Pi projects
- Educational electronics and robotics
Package Includes:
1 × MQ-135 Gas Sensor Module
Important Note: The MQ-135 is a broad-response gas sensor rather than a laboratory-grade air-quality analyzer. Accurate concentration measurement requires suitable calibration and consideration of temperature, humidity, sensor warm-up, and the target gas. Do not use this module as the sole detection device for hazardous or life-safety applications.
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