Continuous Online Monitoring — Zirconia or Electrochemical, 0–25% O₂ Range
Continuous O₂ concentration readout with automatic alarm at user-set threshold.
Zirconia (fast response, long life) or Electrochemical (low cost, no reference gas).
Adjustable high/low O₂ alarm with relay output for automatic product diversion.
4–20 mA isolated output and Modbus RTU for integration with PLC/DCS.
| Measurement Range | 0–1%, 0–5%, 0–25% O₂ (selectable) |
| Sensor Types | Zirconia (ZrO₂) or Electrochemical |
| Accuracy | ±1% of full scale (zirconia), ±2% (electrochemical) |
| Response Time | < 15 seconds (T90) |
| Display | 4-digit LED or 3.5" TFT with bar graph |
| Output | 4–20 mA (isolated), Modbus RTU, 2x relay |
| Calibration | Auto-cal with ambient air (20.9% O₂) |
| Sample Flow | 0.1–1 L/min |
For most industrial applications, electrochemical sensors offer the best value. Choose zirconia if you need faster response time, longer sensor life (3–5 years vs 1–2 years), or are measuring very low O₂ concentrations.
Monthly calibration is recommended for electrochemical sensors. Zirconia sensors require calibration every 3 months. Auto-calibration with ambient air simplifies the process.
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