MQ-2 – Hamtech Electronics Technologies https://hamtechtechnologies.com Sun, 30 Nov 2025 16:44:21 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.2 https://hamtechtechnologies.com/wp-content/uploads/2025/11/h-100x100.webp MQ-2 – Hamtech Electronics Technologies https://hamtechtechnologies.com 32 32 MQ-2 Gas Sensor https://hamtechtechnologies.com/product/mq-2-gas-sensor/ https://hamtechtechnologies.com/product/mq-2-gas-sensor/#respond Thu, 20 Nov 2025 19:51:29 +0000 https://hamtechtechnologies.com/index.php/product/mq-2-gas-sensor/ The MQ-2 Gas Sensor is a popular smoke and combustible gas detector widely used in DIY electronics, home safety alarms, and industrial monitoring systems.
It features a sensitive MQ-series gas-sensing material capable of detecting a wide range of flammable gases, including LPG, propane, methane, hydrogen, and smoke particles.
The module provides both analog and digital outputs, allowing easy integration with Arduino, ESP32, and Raspberry Pi. Its onboard potentiometer allows threshold adjustment for digital triggering, and the built-in LED indicates when gas concentration exceeds the set value.
With fast response and long life, the MQ-2 is ideal for fire detection, gas monitoring, and IoT safety applications.

Key Features

  • Detects smoke, LPG, propane, methane, and hydrogen

  • High sensitivity to combustible gases

  • Fast response and recovery

  • Analog and digital output modes

  • Adjustable sensitivity (potentiometer)

  • Built-in LED indicator for gas alerts

  • Compatible with Arduino, ESP32, Raspberry Pi

Specifications

Feature Details
Operating Voltage 5V DC
Detection Range 300–10,000 ppm
Gases Detected Smoke, LPG, Propane, Hydrogen, Methane
Output Analog voltage, Digital HIGH/LOW
Preheat Time 24–48 hours (initial use)
Current Consumption ≤150 mA
Operating Temperature -10°C to 50°C
Dimensions 32 × 20 × 22 mm

Applications

  • Smoke detection and fire alarms

  • LPG leakage detection

  • Kitchen and home safety monitoring

  • Industrial gas detection

  • IoT-based gas/smoke detector systems

  • Smart home safety devices

Compatible Boards / Circuits

  • Arduino (Uno, Nano, Mega)

  • ESP32 / ESP8266

  • Raspberry Pi (with ADC module)

  • Alarm systems, relay modules, and safety sirens

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