JOY-IT MQ4V2 Semiconductor Gas Sensor Module for Methane, LPG, Natural Gas – Analog & Digital Output, 5V

In a busy industrial kitchen, a small gas leak can go unnoticed until it's too late. The JOY-IT MQ4V2 gas sensor module is a compact, reliable solution for detecting combustible gases like methane, natural gas, LPG, propane, butane, alcohol, hydrogen, and smoke. Based on the MQ-4 semiconductor sensor, this module provides both analog and digital outputs, making it easy to integrate into Arduino, Raspberry Pi, or other microcontroller projects. Whether you're building a DIY gas leak alarm, an environmental monitoring station, or a smart home safety system, the MQ4V2 offers the sensitivity and flexibility you need.

Key specifications

• Sensor element: MQ-4 semiconductor gas sensor
• Target gases: Methane (CH4), natural gas, LPG, propane, butane, alcohol, hydrogen, smoke
• Operating voltage: 5V DC (module)
• Detection range for methane: 300 – 10,000 ppm
• Output: Analog (0–5V) and digital (TTL) via 4-pin header
• Response time: ≤10 seconds; recovery time: ≤30 seconds
• On-board potentiometer for sensitivity adjustment
• Heater voltage: 5V DC; heater resistance: 33Ω ±5%
• Load resistance: 20kΩ (adjustable)
• Power consumption: approx. 150 mA
• Preheat time: 20–30 minutes for stable operation
• Operating temperature: -10°C to 50°C; humidity: ≤95% RH (non-condensing)

Why choose it

The MQ4V2 stands out for its dual output capability and easy calibration. The analog output provides a continuous voltage proportional to gas concentration, ideal for precise measurements, while the digital output gives a simple high/low signal when a threshold is exceeded—perfect for triggering alarms. The on-board potentiometer lets you fine-tune sensitivity for your specific application. With a wide detection range and fast response, it's a dependable choice for both hobbyists and professionals.

Ideal use cases

• DIY gas leak detectors for home or workshop
• Environmental monitoring of methane or LPG levels
• Smart home safety systems integrated with microcontrollers
• Educational projects demonstrating gas sensing principles
• Industrial safety prototypes for combustible gas detection

Good to know

The module requires a 5V power supply and should be preheated for 20–30 minutes before reliable readings. It is not intended for use in hazardous or explosion-proof environments without proper certification. Always ensure adequate ventilation when testing with flammable gases. The MQ4V2 is supplied as a single unit and includes the sensor module only; connection cables and mounting hardware are not included.