Description
Low-cost THT gas sensor with a 0-50 ppm range, 0.5 ppm resolution, and ±10% precision. Suitable for air quality testing, industrial robots, chemical plants, coal mines, pipelines, and fire safety.
Specification
| Model | ATO-S4THT-50 |
| Detection Principle | Electrochemical Three-Electrode |
| Detected Gas | Tetrahydrothiophene (C4H8S) |
| Detection Range | 0-50 ppm |
| Maximum Load Concentration | 100 ppm |
| Sensitivity | 150 ±100 nA/ppm |
| Zero Drift | 0-1 ppm |
| Resolution | 0.5 ppm |
| Response Time | ≤40s |
| Bias Voltage | 0 mV |
| Load Resistance | 5-30Ω |
| Temperature Range | -30°C to 50°C |
| Humidity Range | 15%RH to 90%RH (Non-condensing) |
| Repeatability | <±2% |
| Long-term Stability | <2% Signal/Month |
| Linearity | Linear |
| Operating Pressure | 90 to 110 kPa |
| Warranty | 12 months after delivery |
Dimension (Unit: mm)
Crossover Interference
The chlorine dioxide (ClO2) gas sensor also responds to gases other than the target gas. For reference, the response characteristics of the sensor to several common interfering gases are listed in the table below. The data in the table are typical responses of interfering gases at a given concentration.
| Interfering Gas | Gas Concentration (PPM) | Displayed Value (mg/m³ THT) |
| CO | 500 | -3 |
| H₂S | 25 | 8 |
| N₂ | 100% | 0 |
| NO₂ | 23 | 35 |
| CO₂ | 1000 | 0 |
| H₂ | 2000 | 0 |
Basic Test Circuit
Application
Tetrahydrothiophene (THT) gas sensor can be used in air quality testing, industrial robots, chemical plants, coal mines, instrumentation underground piping, security workshops, fire emergency and so on.
Tips: Why is THT detection important for safety?
Since THT is used as an odorant in natural gas, its presence indicates a gas leak. If THT levels drop too low, gas leaks may go undetected, leading to explosion risks, suffocation hazards, and environmental contamination. A THT gas sensor ensures that:
- Leaks are detected early, before reaching dangerous levels.
- Proper odorant levels are maintained in gas distribution systems.
- Industrial plants and refineries comply with safety regulations.
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