Product Overview
The SX-GH2STSA 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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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 | |
| Example Model | SX-GH2STSA-320 |
| Detection Principle | Electrochemical, 3-electrode |
| Detection Gas | Hydrogen sulfide (H₂S) |
| Detection Range | 0–100 ppm |
| Maximum Load Concentration | 500 ppm |
| Sensitivity & Output | |
| Sensitivity | 650 ± 200 nA/ppm |
| Zero Drift | ±2 ppm |
| Resolution | 1 ppm |
| Repeatability | 1% of output signal |
| 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 Data | |
| 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 | |
| Maximum Diameter | Approx. Ø20 mm |
| Sensing Surface Diameter | Ø16 mm |
| Body Height | 16.95 mm |
| Pin Length | 4.40 mm |
| Pin Diameter | Ø1.5 mm |
| Electrode Circle Diameter | Ø13.5 mm |
| Base Diameter | Ø17.9 mm |
| Dimensional Tolerance | ±0.20 mm |
| Cross Interference | |
| Carbon Monoxide CO |
1 ppm H₂S displayed value at 300 ppm |
| Sulfur Dioxide SO₂ | 1 ppm H₂S displayed value at 20 ppm |
| Hydrogen H₂ | 0 ppm H₂S equivalent at 1000 ppm |
| Ammonia NH₃ | 0 ppm H₂S equivalent at 50 ppm |
| Nitrogen Dioxide NO₂ | −1 ppm H₂S equivalent at 20 ppm |
| Nitric Oxide NO | 2 ppm H₂S equivalent at 50 ppm |
| Chlorine Cl₂ | −1.4 ppm H₂S equivalent at 20 ppm |
Certifications & Compliance
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