Description

The DIY Air Quality Monitoring using MQ-135 Sensor Kit is a hands-on STEM educational project designed to demonstrate the working principle of an air quality monitoring system. The kit uses the MQ-135 Gas Sensor to detect various gases such as ammonia (NH₃), carbon dioxide (CO₂), nitrogen oxides (NOx), alcohol vapors, benzene, and smoke. When the concentration of these gases exceeds a preset threshold, the circuit activates an audible buzzer to indicate poor air quality.

This project introduces students to gas sensing technology, environmental monitoring, and basic electronic alarm circuits. It is ideal for school science projects, STEM education, classroom demonstrations, and beginner electronics learning. No coding or programming is required.

Features

• Demonstrates air quality monitoring principles
• Uses MQ-135 Air Quality Sensor
• Detects multiple harmful gases and smoke
• Audible buzzer indication
• No coding required
• Easy DIY assembly
• Beginner-friendly STEM project
• Reusable electronic components
• Instruction manual included

Kit Contents

• MQ-135 Air Quality Sensor Module – 1 No.
• 12V to 5V DC Voltage Regulator Board – 1 No.
• 5V Active Buzzer – 1 No.
• 9V Battery with Battery Snapper – 1 Set
• Connecting Wires – As Required
• Instruction Manual – 1 No.

Specifications

Working Principle

1. The MQ-135 sensor continuously monitors the surrounding air.
2. Harmful gases interact with the sensor element, causing its electrical resistance to change.
3. The sensor module compares the detected gas concentration with a preset threshold.
4. When the gas concentration exceeds the threshold, the output activates the buzzer.
5. The audible alarm alerts users to poor air quality or the presence of harmful gases.

Learning Outcomes

• Understanding air quality monitoring
• Working principle of gas sensors
• Environmental pollution awareness
• Electronic alarm circuits
• Sensor calibration concepts
• Basic electronics assembly
• STEM problem-solving skills
• Practical environmental monitoring

Applications

• STEM Education
• School Science Projects
• Air Quality Demonstrations
• Environmental Awareness Activities
• Science Exhibitions
• Classroom Experiments
• DIY Electronics Projects
• Educational Workshops

Advantages

• No programming required
• Easy to assemble
• Demonstrates real-world environmental monitoring
• Hands-on practical learning
• Reusable components
• Beginner-friendly
• Encourages awareness of air pollution
• Excellent educational value

Package Includes

• 1 × DIY Air Quality Monitoring using MQ-135 Sensor Kit
• 1 × Instruction Manual

Safety Instructions

• This kit is intended for educational and demonstration purposes only and is not a certified air quality monitoring instrument.
• Use only the recommended power source.
• Allow the MQ-135 sensor to warm up before performing observations.
• Do not expose the sensor to excessive concentrations of flammable gases or open flames.
• Operate the kit in a well-ventilated area.
• Adult supervision is recommended for younger students.

Disclaimer

Product appearance, dimensions, and terminal configuration may vary slightly depending on manufacturing batch without affecting functionality or performance.