MQ-3 Alcohol Gas Sensor

Rs 100
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For MQ-3 Sensor Module

Features of MQ-3 Alcohol Sensor

  • Sensor Type - Semiconductor
  • Easy SIP header interface
  • Compatible with most of the microcontrollers
  • Low-power standby mode
  • Requires heater voltage
  • Good sensitivity to alcohol gas
  • Fast response and High sensitivity  
  • Long life and low cost
  • Requires simple Drive circuit

Specifications of MQ-3 Gas Sensor

  • Power requirements: 5 VDC @ ~165 mA (heater on) / ~60 mA (heater off)
  • Current Consumption: 150mA
  • DO output: TTL digital 0 and 1 ( 0.1 and 5V)
  • AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V
  • Detecting Concentration: 0.05-10mg/L Alcohol
  • Interface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR)
  • Heater consumption: less than 750mW
  • Operating temperature: 14 to 122 °F (-10 to 50°C)
  • Load resistance: 200kΩ
  • Sensitivity S: Rs(in air)/Rs(0.4mg/L Alcohol)≥5
  • Sensing Resistance Rs: 2KΩ-20KΩ(in 0.4mg/l alcohol)
  • Dimensions: 32 x 22 x 16 mm

 

Pin Name

Description

VCC

This pin powers the module, typically the operating voltage is +5V

GND

Used to connect the module to system ground

Digital Out (DO)

You can also use this sensor to get digital output from this pin, by setting a threshold value using the potentiometer

Analog Out (AO)

This pin outputs 0

  • Model: MQ4

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