MQ-8 Gas Sensor Module Expand

MQ-8 Gas Sensor Module - Hydrogen Gas

9MGMQ-8

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This is a simple-to-use hydrogen gas sensor, suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm.

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Description:

This is a simple-to-use hydrogen gas sensor, suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm.

This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.

Main chip: the LM393, MQ-8 gas sensor
Working voltage: DC5V

Note!:

The sensor value only reflects the approximated trend of gas concentration in a permissible error range, it DOES NOT represent the exact gas concentration. The detection of certain components in the air usually requires a more precise and costly instrument, which cannot be done with a single gas sensor. If your project is aimed at obtaining the gas concentration at a very precise level, then we do not recommend this gas sensor.

Features:

  • Using high-quality dual-panel design, with power indicator and TTL signal output instructions
  • With a DO switch signal (TTL) output and AO analog signal output
  • TTL output valid signal is low. (When the output low signal light can be directly connected microcontroller or relay module)
  • The analog output voltage, the higher the concentration the higher the voltage
  • For gas, natural gas has better detection sensitivity.
  • There are four screw holes for easy positioning

Electrical Specifications:

  • Input voltage: 5V DC power
  • Input current: 150mA
  • DO output: TTL digital 0 and 1 (0.1 and 5V)
  • AO output :0.1-0 .3 V (relatively clean), the highest concentration of voltage around 4V

Links:

http://playground.arduino.cc/Main/MQGasSensors

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