MQ-4 Methane Gas Sensor

Rs 100
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Features

  • Good sensitivity to Combustible gas in wide range
  • High sensitivity to CH4, Natural gas.
  • Small sensitivity to alcohol, smoke.
  • Fast response Stable and long life
  • Simple drive circuit

 

Specifications

  • Sensor Type Semiconductor
  • Power requirements: VCC - 5V±0.1
  • 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
  • Detection Gas: Natural gas/Methane
  • Detection Concentration: 200-10000ppm (Natural gas / Methane)
  • 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)
  • RH Related humidity less than 95%Rh
  • O2 Oxygen concentration is 21% (standard condition) - Oxygen concentration can affect sensitivity
  • Load resistance: 20KΩ
  • Sensing Resistance Rs: 10KΩ- 60KΩ (1000ppm CH4)
  • Preheat time:Over 24 hour

For MQ-4 Sensor Module

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 0-5V analog voltage based on the intensity of the gas


  • Standard Encapsulation Bakelite, Metal cap
  • Model: MQ-4

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