Quick Search
Advanced Search
Create Account
Customer Login
Your Shopping Cart in your cart 0 ITEMS
Language: English
3d Printer Parts & Filament
7-Segments Display
AC Conducting Plugs
Access Control RFID
Aluminum Profiles
Arduino Boards & Shields
Audio & Sound
Batteries & Chargers
Books & Magazines
Boxes & Enclosure
Bread Boards & Accessories
Bridge Rectifiers
Buzzers , Piezo & Mic
Cables & Converters
Camera & Imaging Modules
Car Diagnostics Tools
Crystal Oscillators
Data Levels Protocols
DC Fans
DC/DC & AC/DC Converters
Development Board (Open Source)
Diodes & Zener Diodes
DIY Projects
Ethernet Control
Fluid Control
Heat Shrink
Heat Sinks
IC Programmers
IC Sockets
Integrated Circuits (ICs)
Key Pads
LASER Sources
LCD Modules
LED Matrix & LED Bar
Link Boards
Measuring Instruments
Medical Products
Microcontrollers Kits
Motors , Drives & CNC Parts
Opto Couplers
Panel Meters
PC Interface Boards
Power Inverter
Power Supply-SMPS
Project Assistances Hardware
Raspberry Pi Board
Regulated DC Power Supply
Resistors & Potentiometers
Robotics Accessories
Robotics Wheels
Rotary Encoder
Screws & Nuts
Smart Cards
Smart Home Products
SMD Components
Solar Cell
SparkFun Products
Spray, Cleaners & Glue
Tack Switch (Push Buttons)
Thermal Switch
Thermoelectric Cooler
Timer & Temperature Relays
Transformers & Adapter
USB Host & Accessories
Video & TV Accessories
Voltage Regulator
Wires & Crocodiles
Shopping Cart
0 items
What's New?
Standard Matrix Key Pad 3x4 Flat - Grade B
Standard Matrix Key Pad 3x4 Flat - Grade B
Shipping & Returns
Privacy Notice
Conditions of Use
Contact Us
Printable Catalog
Gift Voucher FAQ
Site Map
01.Infrared LED Tx (IR LED)
02.LM35dz "Temperature Sensor"
03.Photo Diode PT3401B-M-3B (Receiver)
04.Ultrasonic Sensor & Distance Measurement Module HC-SR04
05.Infrared Receiver Module "KSM803"
06.Reed Switch (Magnetic Switch)
07.Photo Diode PT3401B-B (Transmitter)
08.Strong Small Disc Round Cylinder Magnet 17x15 mm
09.PT204-6C "Photo Transistor"
10.DS18B20 "Digital Temperature Sensor"
  Product info
MQ-3 Alcohol Ethanol Detection Sensor Module


MQ-3 gas sensor is sensitive material used in clean air, low conductivity tin dioxide (SnO2). When the sensor is present in the environment in which the alcohol vapor , the sensor's conductivity increases with the concentration of alcohol gas in the air increases. Using a simple circuit can be converted to the change in conductivity of the gas concentration with the corresponding output signal. MQ-3 gas sensor with high sensitivity to alcohol , gasoline can resist , smoke , water vapor interference.

This sensor can detect various concentrations of alcohol atmosphere , is a low-cost sensors for a variety of applications.

  • With power indication and TTL signal output indication
  • With Digital DO open signal (TTL) output and AO analog output.
  • Electrical properties: Input voltage: DC 5V; Power consumption (current): 150mA.
  • DO output: TTL digital quantity 0 and 1 (0.1 and 5V).
  • AO output: 0.1~0.3V.
  • Maximum concentration voltage: About 4V.
  • Preheat time: 20s


  • Alcohol (ethanol) detection
  • Car alcohol alarm
  • Breathalyzer

For more information & Data Sheet of this product, please click here.
This product was added to our catalog on Thursday 24 August, 2017.
Because you didn't specify the type and
Customers who bought this product also purchased
Grey Flat Ribbon Cable 40 pin (1 Meter Unit)
Grey Flat Ribbon Cable 40 pin (1 Meter Unit)
DHT11 Humidity & Temperature Sensor "DHT-11"
DHT11 Humidity & Temperature Sensor "DHT-11"
Tilt Detection Sensor Module KY020
Tilt Detection Sensor Module KY020
Solder Wire RAM High Quality 100gm Sn70/Pb30 - 0.6mm
Solder Wire RAM High Quality 100gm Sn70/Pb30 - 0.6mm
2.54mm (0.100") Header Shooting Blocks (Jumpers)
2.54mm (0.100") Header Shooting Blocks (Jumpers)
MQ-2 Gas Sensor Module "Smoke , Butane & Propane Detection"
MQ-2 Gas Sensor Module "Smoke , Butane & Propane Detection"
Powered by osCMax