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Detect Gas Changes with a Practical Air Sensor
The Analog Alcohol Sensor MQ3 is a gas sensor with analog and digital 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 Interface: Analog and digital.
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
- Easy wiring: Analog and digital
- Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
- Common controller support: Works well with Arduino, ESP32, Raspberry Pi, and similar boards
- Project-ready sensing: air-quality projects, leak alerts, and ventilation monitoring
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Analog Alcohol Sensor MQ3 | gas sensor with analog and digital output | Current item |
| Gas Sensor MQ5 Analog LPG For Arduino | gas sensor with analog output | analog output, digital output |
| Gas Sensor MQ135 | gas sensor with UART | analog output, digital output |
| Gas Analog CH4 Gas Sensor MQ4 For Arduino | gas sensor with analog output | adjustable sensing range, analog output |
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 | Analog Alcohol Sensor MQ3 |
|---|---|
| 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 × Analog Alcohol Sensor MQ3
Frequently Asked Questions
What does the Analog Alcohol Sensor MQ3 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.
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