The MQ-5 gas sensor module detects hydrogen, LPG, methane, and carbon monoxide (CO) leaks by measuring their concentration in the surrounding air. It gives an analog output (a varying voltage that rises with gas concentration) at 5V DC, readable on any Arduino or ESP32 analog pin. The mq5 gas sensor covers four combustible and toxic gases from a single compact module.
One non-obvious technical detail is that this sensor uses a heated metal oxide element inside, which means it draws current continuously even when no gas is present. The operating temperature range of -20 to 40 degrees Celsius covers indoor kitchens and labs well. The honest limitation is that the lpg gas sensor responds slightly to alcohol and smoke vapours too, so always calibrate in clean air before setting your alarm threshold. Cross-sensitivity is manageable in code but surprises beginners who skip calibration.
Students, safety engineers, and IoT project makers buy this mq 5 gas sensor module from StemVolt for kitchen alarms, gas monitoring dashboards, and lab safety builds. Connect VCC to 5V, GND to ground, and read the analog output pin in your Arduino sketch to get started.
Related Products:
- Checkout The MQ-9 Gas Sensor Module
Features:
- Detects H2, LPG, CH4, and CO gases giving broad combustible gas coverage in one module
- Operates at 5V DC supply allowing direct connection to Arduino and ESP32 boards
- Analog interface type outputs proportional voltage readable on any standard ADC pin
Technical Specifications:
| Specification | Details |
|---|---|
| Sensor Type | MQ-5 Gas Sensor |
| Detectable Gases | H2, LPG, CH4, and CO Gases |
| Operating Voltage | 5V DC |
| Operating Temperature (°C) | -20 to 40 (°C) |
| Interface Type | Analog |
| Dimension (L x W x H) | 32 x 20 x 22 mm |
Applications:
- A kitchen gas alarm uses this to sound a buzzer when LPG concentration rises
- Lab safety monitor uses this to alert when hydrogen or methane is detected nearby
- MQ-5 gas sensor module reads analog gas level and triggers a relay to cut supply
- An IoT safety project logs gas levels over time and displays alerts on a serial monitor
Package Includes:
- 1 x MQ-5 Gas Sensor Module
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