Product Overview
The SX-GNH3TSA Series is a potentiostatic electrochemical ammonia
sensor. Ammonia and oxygen undergo oxidation–reduction reactions at the working electrode and counter electrode , respectively, generating an electrical current. The output current is proportional to the ammonia concentration, allowing NH₃ concentration to be determined from the measured current.
Main Features
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High Accuracy, Long Life
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Fast Response, fast return to zero
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Low Power Consumption, High Sensitivity
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Wide Linear Range, Strong Interference Resistance
- High Repeatability and Stability
Product Application
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Ammonia gas alarm instruments
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Industrial on-site ammonia gas
detection
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Agriculture and livestock-farming ammonia detection
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Smart municipal ammonia detection
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Atmospheric / ambient ammonia detection
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Technical Data
| Measurement | |
| Example Model | SX-GNH3TSA-340 |
| Detection Principle | Three-electrode electrochemical |
| Detection Gas | Ammonia (NH₃) |
| Detection Range | 0–100 ppm |
| Maximum Overload Concentration | 200 ppm |
| Sensitivity & Output | |
| Sensitivity | 160 ± 40 nA/ppm |
| Zero Drift | 0–1 ppm |
| Resolution | 1 ppm |
| Repeatability | 2% of output signal |
| Linearity | Linear |
| Output | Current proportional to NH₃ concentration |
| Response | |
| Response Time | < 90 s |
| Stability & Service Life | |
| Long-Term Stability | < 2% signal/month |
| Shelf Life | 12 months after delivery |
| Operating Life | 2 years |
| Electrical Specifications | |
| 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 Dimensions | Approx. Ø20 × 16.95 mm |
| Pin Length | 4.40 mm |
| Pin Diameter | Ø1.5 mm |
| Dimensional Tolerance | ±0.2 mm |
| Cross Sensitivity | |
| Carbon Monoxide CO |
0 ppm NH₃ reading at 75 ppm |
| Carbon Dioxide CO₂ | 0 ppm NH₃ reading at 100 ppm |
| Hydrogen Sulfide H₂S | 35 ppm NH₃ reading at 50 ppm |
| Hydrogen H₂ | 0 ppm NH₃ reading at 1000 ppm |
| Butene C₄H₈ | 0 ppm NH₃ reading at 100 ppm |
Certifications & Compliance
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