MQ-8 Hydrogen Gas وحدة حساس

MQ-8 Hydrogen Gas Sensor Module

MQ-8 is a Metal oxide semiconductor (MOS) type sensor from the series of MQ gas sensors (MQ-2, MQ-3, MQ-4, and so on). The module is highly sensitive to Hydrogen gas and can be used to detect any leaks or presence of Hydrogen gas in the air.

Features

• High sensitivity to hydrogen gas (H₂).
• Detects hydrogen concentrations ranging from 100 to 10000ppm.
• Provides both analog and digital output signals.
• Fast response and recovery times for timely detection.
• Simple drive circuit for easy implementation.
• Long service life with stable performance.
• Adjustable sensitivity via onboard potentiometer.
• Compact design suitable for various applications.

Specifications

Parameter

Value

Sensor Type

Semiconductor (SnO₂)

Target Gas

Hydrogen (H₂)

Detection Range

100–10000ppm

Operating Voltage

5VDC

Heater Voltage (VH)

ZKEEP0Z±ZKEEP1Z AC or DC

Load Resistance (RL)

Adjustable

Heater Resistance (RH)

29Ω±3Ω (Room Temp)

Heater Consumption

≤ZKEEP2Z

Sensitivity (S)

Rs(in air)/Rs(1000ppm H₂) ≥5

Preheat Time

≥24 hours

Operating Temperature

-ZKEEP3Z to ZKEEP4Z

Operating Humidity

≤95% RH

PINOUT

Pin

Function

Description

VCC

Input Power Supply

Provides the power supply to the sensor (typically ZKEEP5Z).

GND

Supply Ground

Ground connection for the sensor module.

DO

Digital Output

Provides a digital output signal (high or low) depending on hydrogen gas concentration.

AO

Analog Output

Outputs a variable analog voltage that corresponds to the hydrogen gas concentration.

Applications

• Hydrogen gas leak detectors in residential and industrial settings.
• Safety systems in hydrogen-powered vehicles and fuel cells.
• Industrial process monitoring involving hydrogen gas.
• Environmental monitoring for hydrogen emissions.
• Integration into microcontroller-based projects for hydrogen detection.

Package Contents

• 1x MQ-8 Hydrogen Gas Sensor Module.

Documents

• MQ-8 Hydrogen  Sensor Datasheet.
• MQ-8 Module Tutorial.