Liquefied Isobutane Propane Sensor Module MQ-6

Liquefied Isobutane Propane Sensor Module MQ-6

Sensors
DET656
Part.No: MQ-6
€4.95
In Stock
Immediate Dispatch
MQ-6 Liquefied Gas Sensor Module detects LPG, isobutane, propane and butane concentrations from 200 to 10,000 ppm. Features dual analog (0–5V) and digital (TTL) output, powered at 5V DC — ideal for gas leak detection projects with Arduino and compatible platforms.

 

The MQ-6 Liquefied Isobutane Propane Sensor Module (MPN: MQ-6) is a gas detection module designed to measure concentrations of LPG, isobutane, propane, butane and LNG in the range of 200–10,000 ppm. Operating at 5V DC, it delivers both an analog voltage output (0–5V proportional to gas concentration) and a digital TTL output via the onboard LM393 comparator, making it straightforward to integrate into microcontroller-based safety and monitoring projects.

Key Features

  • Dual Signal Output: Analog 0–5V output for concentration mapping + TTL digital output for threshold triggering → flexibility for both precise measurement and simple alarm logic
  • TTL Active-Low Output: Digital output goes LOW when gas is detected above threshold → can be connected directly to a microcontroller GPIO without extra logic
  • 200–10,000 ppm Detection Range: Covers LPG, LNG, isobutane, propane and natural gas → suitable for home, industrial and DIY gas leak detection
  • High Sensitivity to Target Gases: Optimised for liquefied gases → fast and reliable response even at low concentrations
  • Interference Resistance: Resistant to ethanol vapour, smoke and general petroleum vapours → reduced false alarms in mixed-environment deployments
  • Long Service Life & Reliable Stability: Robust sensor element → cost-effective for permanent installations
  • Quick Response & Recovery: Fast detection and rapid return to baseline → essential for real-time safety systems
  • Onboard LM393 Comparator: Adjustable threshold via onboard potentiometer → no external comparator circuit needed

Pinout & Wiring

PINSymbolDescription
1VCCPower supply — connect to 5V DC
2GNDGround — connect to GND
3DODigital output (TTL, active LOW) — connect to digital GPIO
4AOAnalog output (0–5V) — connect to analog input (ADC)

Wiring note: Connect VCC to the 5V pin of your Arduino, GND to GND, AO to an analog input pin (e.g. A0) and DO to a digital input pin. Adjust the onboard potentiometer to set the detection threshold for the digital output.

Compatibility

  • Arduino UNO / Nano / Mega: Fully compatible — 5V supply and 5V-tolerant ADC on analog pins match the module's output range directly.
  • Raspberry Pi (via ADC): Use an external ADC (e.g. MCP3008) to read the analog output, as the Raspberry Pi GPIO operates at 3.3V.
  • ESP32 / ESP8266: Power the module from the 5V pin; connect the analog output through a voltage divider to stay within the 3.3V ADC input limit.

Typical Applications

  • Home gas leak detector: Trigger an alarm or relay when LPG or butane concentration exceeds a safe threshold in kitchens or utility rooms.
  • Smart ventilation control: Automatically activate an exhaust fan when the sensor detects rising gas levels — a popular Arduino/ESP32 project.
  • Industrial safety monitoring: Embed into a PLC or microcontroller system to log gas concentrations and alert operators.
  • Portable gas detector: Combine with a battery-powered Arduino and buzzer for a handheld LPG sniffer tool.
  • Educational & STEM projects: Learn about ADC readings, sensor calibration and threshold-based logic in electronics courses.

Technical Specifications

ParameterValue
Output InterfaceAnalog (0–5V) + Digital TTL
Working VoltageDC 5V
Digital Output LogicActive LOW (TTL level)
Detection Range200–10,000 ppm (LPG, LNG, isobutane, propane, natural gas)
Main ChipsLM393 comparator + MQ-6 gas sensor
Dimensions32 × 22 × 27 mm
MPNMQ-6

FAQ

Q: Does the MQ-6 module require a warm-up time before giving accurate readings?
A: Yes — like all MQ-series sensors, the MQ-6 requires a pre-heat period (typically a few minutes) after power-on before readings stabilise. Allow for this in your firmware before acting on sensor data.

Q: Can I use the digital output directly with a 3.3V microcontroller like the ESP32?
A: The TTL digital output is driven from the 5V supply, so a 5V signal may be present on the DO pin. Use a voltage divider or level shifter to protect 3.3V GPIO inputs.

Package Contents: 1 × MQ-6 Liquefied Gas Sensor Module

⚠ Warning: This module is intended for indicative detection in hobby and educational projects. It is not certified for use as a primary safety device in commercial or residential gas installations. Always follow local regulations and use certified equipment for life-safety applications.
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