MQ3 MQ-3 Gas Sensor Module
- MQ-3 alcohol-vapour sensor module
- 5V module supply
- Analog output for relative measurements
- Adjustable digital threshold output
- Suitable for Arduino and microcontroller experiments
- Requires warm-up and calibration
- Educational prototype component, not a certified breathalyser
₨ 329 ₨ 510
MQ-3 Alcohol Gas Sensor Module Price in Pakistan
The MQ-3 alcohol gas sensor module is designed for alcohol-vapour detection experiments and provides an analog output plus an adjustable digital threshold output. It is commonly paired with Arduino and other microcontrollers for educational sensing, data logging and alarm prototypes.
When comparing an MQ-3 alcohol sensor price in Pakistan, include warm-up, calibration and environmental conditions in your project plan. The onboard potentiometer adjusts the digital trigger threshold, while the analog output is used for relative measurements. This module is not a certified breathalyser or safety instrument and should not be used for legal, medical or enforcement decisions.
Key features
- MQ-3 alcohol-vapour sensing element
- 5V module supply
- Analog output for relative concentration readings
- Digital output with adjustable trigger threshold
- Power and status indicators on common module versions
- Compatible with Arduino and other microcontroller inputs
Setup notes
Allow adequate preheating, establish a baseline in clean air and calibrate for the intended environment. Gas sensors can respond to more than one vapour, so readings should be treated as indicative rather than laboratory-selective measurements.
Browse more gas sensor modules at Robonation Pakistan. For setup limits and technical guidance, review the official Winsen MQ-3B reference.
Frequently Asked Questions
What is the MQ-3 sensor mainly used for?
The MQ-3 sensing element is mainly used for alcohol-vapour detection experiments and educational monitoring prototypes.
Does the MQ-3 module provide analog and digital outputs?
Yes. The analog output provides a relative sensor response, while the digital output switches at an adjustable threshold.
Can the MQ-3 module be used as a certified breathalyser?
No. It requires warm-up and calibration and is not certified for medical, legal or enforcement decisions.
Why does an MQ-3 module need warm-up and calibration?
The heated sensing element needs time to stabilise, and its baseline varies with the sensor, environment and prior exposure. Establish a clean-air baseline before interpreting changes.
What does the onboard potentiometer adjust?
On common MQ-3 modules it adjusts the digital-output trigger threshold; it does not calibrate the analog output into a certified alcohol concentration.
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