MQ-3 Alcohol Ethanol Gas Sensor Detector Module

Description

Features:

• Gas leakage monitoring device can be used in homes and factories, and is suitable for the detection of alcohol;
• Sensitivity adjustable the blue digital potentiometer adjustment (Figure)
• Before the use of the operating voltage 5V power supply at least warm-up for more than two minutes, the sensor slightly hot is normal;
• Output in the form
  • analog voltage output
  • digital switching outputs (0 and 1)
• With fixed bolt hole for easy installation
• Small board PCB size: 4.5cm * 1.8cm

Module interface specification (4-wire)

• VCC 5V operating voltage
• GND to connect GND
• DO small board digital switch output interfaces (0 and 1)
• The AO small board analog output interface

电源指示= Power Supply Indicator; 开关指示 = Switch Indicator

Documentation please see on this page. 

Additional information