Description
Low cost ClO2 gas sensor for detects 0-50 ppm with electrochemical technology, 50 ppm max load, -600 ±200 nA/ppm sensitivity, and <0.3 ppm zero drift. It has 0.1 ppm resolution, ≤60s response time, and works in 90-110 kPa pressure and -30°C to 50°C temperatures.
Specification
| Model | ATO-S4-ClO2 |
| Detection Principle | Electrochemical Three-Electrode |
| Detected Gas | Chlorine Dioxide (ClO2) |
| Detection Range | 0-50 ppm |
| Maximum Load Concentration | 50 ppm |
| Sensitivity | -600 ±200 nA/ppm |
| Zero Drift | <0.3 ppm |
| Resolution | 0.1 ppm |
| Response Time | <60s |
| Operating Pressure | 90 to 110 kPa |
| Temperature Range | -30°C to 50°C |
| Humidity Range | 15%RH to 90%RH (Non-condensing) |
| Repeatability | <±2% Signal/Month |
| Long-term Stability | <2% Signal/Month |
| Linearity | Linear up to 50 ppm |
| Service Life | 2 years |
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 Used (ppm) | Displayed Value (ppm/ClO₂) |
| CO | 100 | 0 |
| NO₂ | 10 | 14 |
| H₂S | 20 | -5 |
| H₂ | 3000 | 0 |
| Cl₂ | 10 | 15 |
| CO₂ | 5000 | 0 |
Basic Test Circuit
Application
Chlorine dioxide (ClO2) gas sensor can be used in industrial plant, medical field, catering industry, petroleum and petrochemical, coal mine tunnel, instrumentation, fruit tree garden, farm and ranch, agricultural greenhouse, floriculture, laboratory and so on.
Tips: What is chlorine dioxide (ClO₂), and why is it important to detect?
Chlorine dioxide (ClO₂) is a yellow-green gas commonly used in water treatment, disinfection, and bleaching processes. While effective for sterilization, ClO₂ is toxic at high concentrations, posing respiratory and eye hazards. Real-time monitoring helps ensure safety in industrial, medical, and environmental applications by preventing overexposure.
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