Good H2 Sensitivity
Designed for hydrogen detection across the specified 100–1000 ppm range.
MQ-8 Semiconductor Hydrogen H2 Gas Sensor
The Winsen MQ-8 is a low-cost SnO2 semiconductor hydrogen sensor for 100–1000 ppm H2 detection. It offers good hydrogen sensitivity, a simple drive circuit and long service life for domestic, industrial and portable gas alarms.
BrandWinsen
Sensing PrincipleSemiconductor
Target GasH2
Product TypeSemiconductor Hydrogen Gas Sensor
Hydrogen Sensing for OEM Integration
Product Overview
A widely used SnO2 semiconductor hydrogen sensor for cost-effective leakage alarms and portable gas detectors.
The MQ-8 sensitive material is SnO2, which has lower conductivity in clean air and higher conductivity as hydrogen concentration increases.
A simple external circuit can convert the conductivity change into an output signal related to hydrogen concentration.
Designed for Reliable Integration
Key Features
Simple Drive Circuit
Suitable for cost-sensitive alarm and detector designs.
Long Service Life
Official specifications list a 10-year life span.
Low-Cost Sensor Platform
Common metal-cap semiconductor architecture supports economical designs.
Wide Application Base
Used in domestic, industrial and portable gas detection equipment.
Anti-Interference Characteristics
Official product information notes anti-interference to other gases.
Typical Use Cases
Applications
Domestic Gas Leakage Alarms
Industrial Flammable Gas Alarms
Portable Gas Detectors
Low-Cost H2 Detection
Official Product Parameters
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | MQ-8 |
| Sensor Type | Semiconductor |
| Standard Encapsulation | Bakelite, Metal cap |
| Target Gas | Hydrogen |
| Detection Range | 100～1000ppm(H2 gas) |
| Loop Voltage (Vc) | ≤24V DC |
| Heater Voltage (VH) | 5.0V±0.1V AC or DC |
| Load Resistance (RL) | Adjustable |
| Heater Resistance (RH) | 30Ω±3Ω(room tem.) |
| Heater Consumption (PH) | ≤950mW |
| Sensitivity (S) | Rs(in air)/Rs(in 1000ppm H2)≥5 |
| Output Voltage (Vs) | 2.5V～4.0V (in 1000ppm H2) |
| Concentration Slope (α) | ≤0.6(R1000ppm/R400ppmH2) |
| Standard Test Temperature/Humidity | 20℃±2℃；55%±5%RH |
| Standard Test Circuit | Vc:5.0V±0.1V； VH:5.0V±0.1V |
| Preheat Time | Over 48 hours |
| O2 Content | 21%（not less than 18%） O2 concentration effects initial value, sensitivity and repeatability |
| Life Span | 10 years |
| Size | φ19×24.2 |
Specifications are based on the official Winsen product page or product manual. Confirm the latest datasheet, calibration requirements, communication protocol and mechanical drawing before final product design.
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