Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Detect Gas Changes with a Practical Air Sensor
The Gas LPG Butane Propane Methane Alcohol Sensor Analog MQ2 For Arduino Gravity is a gas sensor with analog output designed for air-quality projects, leak alerts, and ventilation monitoring. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Power supply needs: 5V; Interface type: Analog; Size: 36.4x26.6mm (1.4x1'').
Important: Most gas and chemical sensors work best after warm-up and calibration. Readings can drift with temperature, humidity, and sensor age.
Why you’ll love it
- Key feature: Easily recognitive interfaces of sensors ("A" for analog and "D" for digital)
- High quality connector: High quality connector
- Wide detecting scope: Wide detecting scope
- Easy wiring: Analog
- Power range: 5V
- Compact size: 36.4x26.6mm (1.4x1'')
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Gas LPG Butane Propane Methane Alcohol Sensor Analog MQ2 For Arduino Gravity | gas sensor with analog output | Current item |
| Hydrogen Gas Analog Sensor MQ8 For Arduino Gravity | gas sensor with analog output | analog output, gas detection |
| Gas CO Combustible Analog Sensor MQ9 For Arduino Gravity | gas sensor with analog output | analog output, gas detection |
| Gas Sensor MQ6 Analog Propane For Arduino | gas sensor with analog output | analog output, gas detection |
What you can build
This sensor is a good fit for gas leak alarms, indoor air monitors, safety demos, ventilation control, and science projects.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard and jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include fresh-air test setup, an enclosure with vents, and a display for local readout, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Gas LPG Butane Propane Methane Alcohol Sensor Analog MQ2 For Arduino Gravity |
|---|---|
| Interface type | Analog |
| Power supply needs | 5V |
| Size | 36.4x26.6mm (1.4x1'') |
| Interface | Analog and digital |
| Category | gas sensors |
Wiring & usage notes
Many modules in this style expose both analog and digital pins. Use the analog pin for raw readings and the digital pin for threshold-based switching, if available. Most gas and chemical sensors work best after warm-up and calibration. Readings can drift with temperature, humidity, and sensor age.
What’s in the box
1 × Gas LPG Butane Propane Methane Alcohol Sensor Analog MQ2 For Arduino Gravity
Frequently Asked Questions
What does the Gas LPG Butane Propane Methane Alcohol Sensor Analog MQ2 For Arduino Gravity measure?
It is designed to measure gas concentration changes in air.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this Analog and digital sensor?
This module may provide both analog and digital outputs, depending on how you wire and read it.
Does it need calibration?
Yes. Chemical and gas sensors usually need warm-up time, calibration, and periodic checking if you want stable readings.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →