🎯 Learning Objectives:

• Students will understand what an air quality sensor is and what types of pollutants it can detect.

• They’ll gain a clear idea of how data about the air in their school is collected.

📚 Lesson Content:

• Types of sensors used:

  • CO₂ sensors – NDIR technology

  • PM2.5 / PM10 sensors – laser-based (e.g., PMS7003)

  • VOC sensors – MOS-based (e.g., SGP30)

• Basic explanation of how sensors work:

  • Measure the concentration of substances in the air

  • Send data to a microcontroller (ESP32, Raspberry Pi, etc.)

🧠 Fun fact: A CO₂ sensor can detect how many people are in a room based on the air they exhale!

🧩 Interactive Activity:

• Video: Disassembly of an air quality sensor – showcasing internal components (board, fan, filter).

• Online simulation: Students can choose a virtual sensor and simulate measurements in different scenarios (e.g., open window vs. closed room).