Industrial Gas Leak Detector Kit — Arduino Uno Night-Only Safety Alert with MQ-2 and LDR

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

This kit brings an industrial safety puzzle straight to your breadboard — a gas leak alarm that only triggers after dark. Inspired by real night-shift factory protocols, you’ll wire an MQ-2 combustible gas sensor and an LDR light sensor to an Arduino Uno. The active buzzer sounds only when both conditions are met: gas is detected AND it’s night time. It’s a brilliant, hands-on way to grasp conditional logic and sensor integration without complex coding.

What You'll Build

You will assemble a fully functional safety circuit. The MQ-2 continuously samples air for methane, butane, or LPG leaks. An LDR reads ambient light. Only when the gas concentration crosses your set threshold and the LDR confirms darkness, the buzzer alarm goes off. During the day, the system stays silent — exactly like a facility that disables non-critical alerts during busy shifts.

What You'll Learn

• Wiring and calibrating an MQ-2 gas sensor module
• Reading analog sensor values with Arduino’s ADC
• Implementing a logical AND condition (if gas AND night)
• Building an LDR voltage divider for light detection

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for young learners across India who are just starting with electronics. It’s ideal for ATL Tinkering Lab activities, CBSE Class 5–9 science projects, and hobby clubs where children build real circuits under guidance. First-year B.Tech ECE students also find it a fast introduction to sensor fusion. Parents looking for a meaningful screen-free project will appreciate the clear, safety-focused outcome.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.