MQ-135 Air Quality Sensor Gas Detection Module for Arduino

MQ-135 Indoor Air Quality Sensor Module for Gas Detection

Product Overview

The MQ-135 Air Quality Sensor Module is a reliable and cost-effective solution for monitoring indoor air pollution and detecting a wide range of harmful gases. This module is designed with both analog and digital outputs, making it easy to integrate with Arduino, Raspberry Pi, and other microcontroller platforms. With its compact size and adjustable sensitivity, it is widely used in DIY electronics projects, smart home systems, and industrial safety applications. Available at Bigyan Project, this sensor provides an excellent balance between performance, accuracy, and affordability.

Product Specifications

Features

• Wide detection range covering multiple harmful gases
• Dual output: both analog and digital signals available
• Compact design for easy integration into various projects
• High sensitivity with adjustable detection threshold
• Fast response and recovery time
• Stable long-term operation with low power consumption
• Compatible with Arduino, Raspberry Pi, ESP32, and more

Applications / Use Cases

• Indoor air quality monitoring for homes, offices, and schools
• Smart home automation systems
• Industrial and laboratory gas detection
• DIY electronics projects and learning kits
• IoT-based air pollution monitoring solutions
• Environmental monitoring systems

User Guide / How to Use

To use the MQ-135 sensor, connect the VCC pin to a 5V DC power source, GND to ground, and the output pins to your microcontroller. The module provides both digital and analog signals. The analog output varies with gas concentration, while the digital output can be calibrated using the onboard potentiometer. For best results, allow the sensor to warm up for at least 20 seconds before taking stable readings. The module can be interfaced with Arduino, Raspberry Pi, or ESP32 using standard coding libraries. At Bigyan Project, we provide guidance and support to help you integrate this sensor into your projects.

Frequently Asked Questions (FAQs)

• Q: Which gases can the MQ-135 detect?
  A: It detects NH3, NOx, Alcohol, Benzene, Smoke, and CO2, among other harmful gases.
• Q: Can I use this sensor with Arduino?
  A: Yes, the module works seamlessly with Arduino and other microcontrollers.
• Q: How long does the sensor take to warm up?
  A: The sensor requires about 20 seconds of warm-up time for accurate readings.
• Q: Is this sensor suitable for outdoor air quality monitoring?
  A: It is designed primarily for indoor use but can be adapted for outdoor environments with proper protection.
• Q: Where can I buy the MQ-135 sensor?
  A: You can purchase it directly from Bigyan Project for reliable quality and support.

Challenges and Considerations

• Requires a warm-up period before stable readings
• Sensitivity may vary based on environmental factors
• Not a substitute for certified industrial gas detectors
• Needs calibration for precise measurements

Compatibility

• Works with Arduino Uno, Nano, Mega, and other models
• Compatible with Raspberry Pi and ESP32 boards
• Integrates with IoT platforms and data logging systems
• Supports both analog and digital input readings

Future Enhancement Options

• Integration with wireless modules for remote monitoring
• Use with AI-based analytics for predictive air quality alerts
• Combination with temperature and humidity sensors for accurate environment tracking
• Implementation in smart city projects

Benefits

• Affordable and easy to use for beginners and professionals
• Provides real-time air quality data
• Helps in developing educational and DIY projects
• Supports awareness of air pollution and environmental safety
• Available with customer support at Bigyan Project

Conclusion

The MQ-135 Air Quality Sensor Module is a versatile and reliable tool for detecting harmful gases and monitoring indoor air quality. Whether you are a hobbyist working on DIY projects, an educator teaching electronics, or a professional building IoT solutions, this sensor provides valuable insights into air pollution levels. With compatibility across multiple platforms and easy integration, it is widely adopted in environmental monitoring applications. Purchase from Bigyan Project to ensure quality, authenticity, and expert support for your projects.