Hydrogen Sulphide （H2S） Sensor, Gas Sensor
Hydrogen Sulphide （H2S） Sensor, Gas Sensor
Overview
- Detects hydrogen sulphide gas with excellent precision, providing consistent and reliable readings even at low concentrations
- Covers 0–100 ppm as standard, with extended versions available up to 1000 ppm for demanding industrial applications
- Reacts quickly to changes in gas levels with a typical T90 time under 30 seconds, enabling real-time safety monitoring
- Utilizes advanced electrochemical sensing technology to minimize interference from other gases while maintaining long-term signal stability
- Small footprint and low power consumption make it ideal for portable devices, IoT modules, and continuous monitoring systems
- Supports analog voltage, current loop, and digital outputs (UART / I²C) for seamless integration with control units or IoT gateways
- Built-in compensation algorithms ensure accurate readings under varying environmental conditions
- Offers more than 24 months of stable performance with minimal calibration requirements, reducing maintenance costs
- Delivered pre-calibrated for plug‑and‑play setup, simplifying deployment for OEM and custom applications
- RoHS and CE compliant, designed for global distribution and environmental safety standards
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Hydrogen Sulphide (H2S) Sensor | High-Precision Electrochemical Toxic Gas Sensor for or Industrial Safety & IoT Applications
What is Hydrogen Sulphide (H2S) Sensor
The Hydrogen Sulphide (H₂S) Sensor is a professional-grade gas detection device designed for accurate, real-time monitoring of hydrogen sulphide concentrations in industrial and environmental settings. Engineered with advanced electrochemical sensing technology, it delivers precise readings even in harsh or high-humidity environments.
With optional analog or digital output interfaces, the sensor can be easily integrated into industrial control systems, environmental monitoring stations, or IoT platforms for continuous air quality assessment. Its compact, robust, and energy-efficient design makes it ideal for smart factories, wastewater treatment plants, oil & gas facilities, and safety-critical applications.
Built for durability and low drift, this H₂S sensor helps reduce maintenance costs and ensures consistent detection over a long service life.
Advantages of Hydrogen Sulphide (H₂S) Sensor
High-sensitivity electrochemical element for accurate H₂S detection
Wide measurement range: 0–100 ppm (customizable versions available up to 1000 ppm)
Fast response and recovery times for immediate hazard detection
Excellent selectivity with minimal cross-interference from other gases
Long-term stability and low baseline drift
Analog voltage, current, or UART digital interface options for flexible integration
Compact, low-power design suitable for handheld, fixed, or networked monitoring systems
Built-in temperature compensation for precise readings under varying conditions
Factory calibrated and individually tested for reliability
RoHS compliant and designed for industrial safety and environmental compliance
Hydrogen Sulphide (H2S) Sensor Specifications
| Parameter | Specification |
|---|---|
| Sensor Type | Electrochemical H₂S Gas Sensor |
| Measurement Range | 0–100 ppm (standard); optional 0–1000 ppm |
| Detection Principle | Electrochemical reaction |
| Sensitivity | 0.5 ± 0.1 µA/ppm (typical) |
| Accuracy | ±2 ppm or ±3% of reading (whichever is greater) |
| Resolution | 0.1 ppm |
| Response Time (T90) | ≤30 seconds |
| Operating Voltage | 3.3V – 5V DC |
| Output Type | Analog voltage / UART / I²C / 4–20 mA |
| Operating Temperature | –20°C to +50°C |
| Operating Humidity | 15–90% RH (non-condensing) |
| Long-Term Stability | <2% signal loss/month |
| Expected Lifetime | ≥24 months under normal use |
| Calibration | Factory calibrated, user recalibration supported |
| Compliance | RoHS, CE certified |
| Packaging Options | Bare sensor, module with protective housing, or custom OEM format |
Typical Applications of Hydrogen Sulphide (H₂S) Sensor
Industrial Safety & Gas Detection
Real-time detection of toxic H₂S gas leaks in oil refineries, chemical plants, and wastewater systems
Worker safety monitoring in confined spaces, tunnels, and processing areas
Environmental Monitoring
Continuous air quality assessment for ecological studies and pollution tracking
Smart city and environmental IoT station integration
Smart IoT & Automation Systems
Integration with BLE/Wi-Fi IoT hubs for remote and cloud-based data monitoring
Predictive maintenance and early-warning safety platforms
Laboratory & Educational Use
Research-grade H₂S measurement for experiments or academic projects
Compact module versions ideal for educational or prototyping purposes
FAQ
1. What is a Hydrogen Sulphide (H₂S) sensor used for?
The H₂S sensor detects and measures hydrogen sulphide gas in the environment. It’s commonly used in industrial safety, wastewater treatment, oil and gas facilities, and environmental monitoring systems to prevent exposure to toxic gas levels.
2. How does the H₂S sensor work?
Our H₂S sensor uses an electrochemical sensing element that reacts with hydrogen sulphide molecules. The reaction generates an electrical signal proportional to the gas concentration, allowing accurate, real-time measurement.
3. What is the detection range and accuracy of this sensor?
The standard version measures 0–100 ppm of H₂S with a typical accuracy of ±2 ppm or ±3% of reading, whichever is greater. Extended-range models up to 1000 ppm are also available for more demanding environments.
4. Can this sensor be integrated with IoT or automation systems?
Yes. The sensor supports multiple output types—analog (voltage/current), digital UART, and I²C—making it easy to connect with microcontrollers, data loggers, or IoT platforms for remote monitoring and data analytics.
5. How often should the H₂S sensor be calibrated?
For optimal accuracy, factory calibration is included, but periodic recalibration is recommended every 6–12 months depending on the operating environment and usage intensity.
6. Is the sensor suitable for outdoor or humid environments?
Yes. The H₂S sensor is designed to operate reliably in moderate humidity (15–90% RH, non-condensing) and temperature ranges from –20°C to +50°C. For long-term outdoor use, a protective enclosure is advised.
7. What is the typical lifetime of the sensor?
Under normal operating conditions, the sensor lifespan is ≥24 months. Proper handling, correct voltage supply, and regular calibration can help extend its service life.
8. Can I use this sensor in portable or wearable gas detectors?
Absolutely. Its compact, low-power design makes it ideal for integration into portable gas monitors, safety wearables, or custom smart IoT devices.
Related Gas Sensor Products
In addition to H₂S sensors, we offer a full range of gas sensors for different monitoring requirements:
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Strict Production Process
Engineers develop optimized electronic circuits and structural designs based on real application needs.
High-quality components and materials are carefully selected from trusted suppliers to ensure long-term reliability.
Automated SMT and precision soldering technologies are used to build stable and high-performance circuit boards.
Sensor elements or connector terminals are assembled with the PCB and housing to ensure accurate operation and strong mechanical stability.
Each product undergoes strict calibration and functional testing to guarantee accuracy and stable performance.
Every unit is carefully inspected, labeled, and securely packaged to ensure it arrives safely and performs reliably for your applications.
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