Product Overview
The SX-GH2STMA hydrogen sulfide gas detection sensor is a potentiostatic electrochemical sensor. Hydrogen sulfide and oxygen undergo oxidation-reduction reactions at the working electrode and counter electrode, respectively, generating an electrical current. The generated current is proportional to the hydrogen sulfide concentration, allowing the H₂S concentration to be determined by measuring the output current.
Main Features
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High Accuracy , Long Service Life
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Fast Response , Fast Recovery
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Small Size low power consumption, high sensitivity
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Wide Linear Range
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Strong Anti-Interference Capability
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High Repeatability and stability
Product Application
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Hydrogen sulfide alarms and detectors
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Industrial site H₂S gas detection
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Mine H₂S detection
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Ambient air H₂S detection
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Technical Data
| Measurement | |
| Model | SX-GH2STMA Series |
| Detection Principle | Electrochemical, 3-electrode |
| Detection Gas | Hydrogen sulfide (H₂S) |
| Detection Range | 0–100 ppm |
| Maximum Load Concentration | 200 ppm |
| Sensitivity & Stability | |
| Sensitivity | 145 ± 25 nA/ppm |
| Zero Drift | ±2 ppm |
| Resolution | 0.5 ppm |
| Repeatability | < ±2% |
| Long-Term Stability | <2% signal/month |
| Linearity | Linear, regression coefficient R² = 0.999 |
| Response | |
| Response Time | < 30 s |
| Stability & Service Life | |
| Shelf Life | 12 months after delivery |
| Service Life | 2 years |
| Electrical | |
| Bias Voltage | 0 V |
| Load Resistance | 5–30 Ω |
| Environmental Conditions | |
| Operating Temperature | −30°C to +50°C |
| Operating Humidity | 15–90% RH, non-condensing |
| Operating Pressure | 90–110 kPa |
| Mechanical Data | |
| Overall Diameter | Ø14 mm |
| Sensing Opening Diameter | Ø9 mm |
| Body Height | 9.5 mm |
| Pin Length | 3.5 mm |
| Pin Diameter | Ø0.8 mm |
| Dimensional Tolerance | ±0.2 mm |
| Cross Interference | |
| Carbon Monoxide CO |
0.75 ppm H₂S displayed value at 100 ppm |
| Sulfur Dioxide SO₂ | 2 ppm H₂S displayed value at 20 ppm |
| Hydrogen H₂ | 1.5 ppm H₂S displayed value at 1000 ppm |
| Ammonia NH₃ | −1 ppm H₂S displayed value at 50 ppm |
| Nitrogen Dioxide NO₂ | −1 ppm H₂S displayed value at 5 ppm |
Certifications & Compliance
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