Specification:

Features:

• Gas Detection Type:
  Specially designed to detect Hydrogen gas (H₂) in the air.

• High Sensitivity to Hydrogen:
  Highly sensitive to hydrogen with quick response and recovery times.

• Wide Detection Range:
  Can detect hydrogen concentrations in the range of 100 to 10,000 ppm (parts per million).

• Dual Output Options:

  • Analog Output (AO): Provides variable voltage based on gas concentration.

  • Digital Output (DO): Active when concentration exceeds set threshold (adjustable via onboard potentiometer).

• Onboard Adjustable Sensitivity:
  Potentiometer allows tuning of digital output threshold level for custom detection limits.

• Stable & Long Lifespan:
  Durable sensing element with stable output over time and long operating life.

• Operating Voltage:
  Typically 5V DC.

• Preheat Time:
  Requires a preheating time of around 20 seconds for accurate measurement after powering on.

• LED Indicators:
  Onboard power and digital output indicator LEDs for visual status feedback.

• Easy Microcontroller Interface:
  Compatible with ESP8266, ESP32, Pi, etc.

• Compact PCB Module:
  Breakout board includes mounting holes, pin headers, and signal labeling for quick prototyping.

Description:

The MQ-8 gas sensor module is a device that can detect the presence of hydrogen gas in the air. It is commonly used in applications such as gas leak detectors, safety devices, and industrial control systems. The MQ-8 sensor operates by using a chemical reaction between the hydrogen gas and a conductive metal oxide to produce a current. The magnitude of the current is proportional to the concentration of hydrogen gas in the air. The sensor can be used to detect hydrogen gas concentrations in the range of 100-10000 ppm.

Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal. MQ-8 hydrogen gas sensor of high sensitivity, the monitoring of the other hydrogen-containing gas is also very satisfactory.
This sensor can detect a wide range of hydrogen gas, city gas, in particular, is a low-cost sensor for a variety of applications. Suitable for home or industrial hydrogen leakage monitoring devices. Can not interfere with ethanol vapor, soot, carbon monoxide, and other gases.