MQ-8 Hydrogen Gas Sensor Module H2 Alarm Detection

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) 5.0V±0.1V AC or DC
Load Resistance (RL) Adjustable
Heater Resistance (RH) 29Ω±3Ω (Room Temp)
Heater Consumption ≤900mW
Sensitivity (S) Rs(in air)/Rs(1000ppm H₂) ≥5
Preheat Time ≥24 hours
Operating Temperature -10°C to 50°C
Operating Humidity ≤95% RH