MQ-3 Alcohol, Gas Sensor MQ3

The MQ3 analog gas sensor is suitable for detecting alcohol; this sensor can be used in a breathalyzer.
It has high sensitivity to alcohol and low sensitivity to gasoline.
The sensitivity can be adjusted using a potentiometer.
- Size Guide
Size Guide
DRESSEST-SHIRTBOTTOMSDRESSESSize Chest Waist Hips XS 34 28 34 S 36 30 36 M 38 32 38 L 40 34 40 XL 42 36 42 2XL 44 38 44 All measurements are in INCHES
and may vary a half inch in either direction.
T-SHIRTSize Chest Waist Hips 2XS 32 26 32 XS 34 28 34 S 36 30 36 M 38 32 38 L 40 34 40 XL 42 36 42 All measurements are in INCHES
and may vary a half inch in either direction.
BOTTOMSSize Chest Waist Hips XS 34 28 34 S 36 30 36 M 38 32 38 L 40 34 40 XL 42 36 42 2XL 44 38 44 All measurements are in INCHES
and may vary a half inch in either direction.
- Delivery & Return
Delivery
Store delivery FREE
1-3 working days
Home or collection point from £35.00 FREE
On all your orders for home or collection point delivery
Returns
Return
We will accept exchanges and returns of unworn and unwashed garments within 30 days of the date of purchase (14 days during the sales period).
Returns in store FREE
Your return will usually be processed within a week to a week and a half. We’ll send you a Return Notification email to notify you once the return has been completed. Please allow 1-3 business days for refunds to be received to the original form of payment once the return has been processed.
- Ask a Question
600,00 DA
MQ3 Gas Sensor
MQ-3 gas sensor for detecting alcohol and ethanol, with high sensitivity and fast response time.
Features:
-Power Supply: 5V
-Interface Type: Analog
-High sensitivity to alcohol and low sensitivity to benzine
-Fast response and high sensitivity
-Stable and durable
-Simple driver circuit
-Size: 36.4×26.6mm
Example of mounting the MQ-3 sensor with an Arduino board

| Brand | Arduino |
|---|
Related Products
The SG90 servo motor is a type of continuous rotation motor controlled by a digital signal. It is used in projects such as robotics, position control systems, and DIY projects.
Arduino Nano has enough processing power to control many electronic components. It has several I/O pins, which allows to connect it to many components. , it is a compact and reduced version of Arduino uno maroc.
Arduino Nano has 14 digital inputs/types (6 of which can be used as PWM outputs), 8 analog inputs.
The Arduino Mega 2560 is a microcontroller board based on the ATmega2560. It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.
This is a general OLED display Module, 0.91inch diagonal, 128×32 pixels, with embedded controller, communicating via I2C interface.
Seven-segment display (5611AH):
- The 7-segment displays consist of a series of LEDs placed to form numbers.
- A 7-segment display allows you to view the digits from 0 to 9.
- Typical voltage: 2.2v / Current per segment max: 30mA
The “LJ12A3-4-Z/BX” is an inductive proximity sensor that detects metal objects within a 4mm range. It operates on a DC 6-36V power supply and has an NPN (Normally Open) digital output, meaning it completes a circuit to the signal line when it detects metal. These sensors are used in industrial automation for non-contact switching, control, and detection
MODULE compatible Arduino to control 4 motors DC or 2 stepper motors and have 2 connections for servomotors. This shield uses pins D3 to D12 for operation (direction, speed, etc).
The module is based on two L293D drivers and can control up to 4 DC motors with an intensity of 0.6 A per output (1.2 A at peak).
1.3-inch OLED display module with a 128×64 pixel resolution and a blue monochrome screen. It uses an I2C/IIC interface for communication, requires a 4-pin connection, and is compatible with 3.3V to 5V microcontrollers like the Arduino. Key features include high brightness, self-emission (no backlight needed), high contrast, low power consumption, and a wide viewing angle
12mm 12528 LDR is a type of photoresistor with a 12mm diameter and the model number GL12528, which changes its resistance based on the intensity of light it is exposed to. The resistance of the component is high in the dark and drops significantly as light increases, making it useful for detecting ambient light levels








