Product Description
This product is used to measure the concentration of sulfur dioxide gas and can replace the standard four-series electrochemical sulfur dioxide sensors through pin connections.
Performance Parameters
| Range | 0 ~ 20 ppm |
| Maximum Load | 150 ppm |
| Sensitivity (20℃) | 0.5 ± 0.1 μA/ppm |
| Response Time (T90) | ≤ 45 s |
| Baseline (20℃) | < ±0.2 μA |
| Baseline Drift (-20℃ ~ 50℃) | < 0.5 ppm |
| Resolution | 0.1 ppm |
| Linearity | Linear |
| Bias Voltage | 0 mV |
Product Dimensions
Operating Environment
| Temperature Range | -20℃ ~ 50℃ |
| Pressure Range | 1 ± 0.1 Standard Atmosphere |
| Humidity Range | 15% ~ 90%RH (No condensation) |
Lifetime
| Long-term Stability | < 2% Signal Value/Month |
| Storage Temperature | 10℃ ~ 30℃ |
| Service Life | 2 Years (in air) |
| Storage Time | 6Months (in dedicated packaging) |
| Warranty Period | 12Months |
Intrinsic Safety Data
| Maximum Current at 150ppm Sulfur Dioxide | < 0.2 mA |
| Maximum Open Circuit Voltage | 1.3 V |
| Maximum Short Circuit Current | < 1.0 A |
Physical Properties
| Housing Material | ABS |
| Weight | 5 grams |
| Directionality | None |
Installation Instructions
Please connect the electrode pins correctly; incorrect connections will affect the normal operation of the sensor. The sensor should avoid contact with organic solvents, paints, oils, and high-concentration gases. Do not use adhesives directly on or near the sensor to prevent damage to the plastic housing. If used in special environments, please contact us in advance.
Cross Sensitivity
| Gas | Concentration (ppm) | Output Signal (equivalent toppm of sulfur dioxide)) |
| Hydrogen Sulfide | 15 | 0.1 |
| Carbon Monoxide | 100 | 0.0 |
| Nitric Oxide | 50 | 0.1 |
| Nitrogen Dioxide | 5 | -5.5 |
| Hydrogen | 1000 | 0.2 |
| Ammonia | 20 | 0.0 |
| Chlorine | 5 | -1.5 |
| Acetylene | 10 | < 2.0 |
| Ethylene | 50 | 0.2 |
Note: The above cross sensitivity includes but is not limited to the gases listed. The sensor may respond to other gases. The values of cross sensitivity may vary with different production batches and testing environments. Calibration with the target gas is required before use. Calibration with cross-sensitive gases does not guarantee the accuracy of calibration and measurement.
Temperature Effects
Safety Instructions
This sensor is designed as a specific instrument to ensure personal safety. To ensure the sensor operates according to its specifications within the instrument, please read the instrument’s user manual carefully and calibrate with certified target calibration gases before each use; otherwise, serious accidents may occur. Do not open the housing to prevent electrolyte leakage and injury. It is strongly recommended that customers refer to this document for product design or application to verify sensor performance.