Extremely Fast Sensor Response
The FO 510 provides exceptionally fast response to changes in oil moisture content, enabling reliable real-time monitoring and rapid detection of critical conditions.
CS Instruments – FO 510
Fast and highly accurate measurement of water activity (aw) and temperature in technical oils – independent of oil type or oil age. Optional calculation of absolute water content (ppm) for transformer oils.
| Measuring Range: 0…1 aw |
| Accuracy (0…0.9 aw): ±0.02 aw (at +23 °C) |
| Accuracy (0.9…1.0 aw): typically ±0.03 aw (at +23 °C) |
| Process Temperature: 0…125 °C (±0.3 °C) |
| Pressure Range: up to 300 bar |
| Interfaces: 2× 4–20 mA + Modbus RTU (RS-485) |
| Protection: IP66 |
| Measuring Range: 0…1 aw |
| Accuracy (0…0.9 aw): ±0.02 aw (at +23 °C) |
| Accuracy (0.9…1.0 aw): typically ±0.03 aw (at +23 °C) |
| Process Temperature: 0…125 °C (±0.3 °C) |
| Pressure Range: up to 300 bar |
| Interfaces: 2× 4–20 mA + Modbus RTU (RS-485) |
| Protection: IP66 |
- FO 510 – Industrial Oil Moisture SensorIndustrial sensor for measuring water activity (aw) and temperature in technical oils. The standard version includes a stainless-steel housing, M12 (8-pin) connector, IP66 protection, two 4–20 mA analog outputs and Modbus RTU (RS-485).
- Standard Output ConfigurationAnalog output 1: water activity (aw). Analog output 2: oil temperature (°C). Measurements are independent of oil type and age.
- Standard Transformer Oil VersionFactory calibration for transformer oil with optional calculation of absolute water content (ppm).
| Parameter | FO 510 |
|---|---|
| Measuring Range (Water Activity) [aw] | 0 … 1 |
| Accuracy (0 … 0.9 aw) [aw] | ±0.02 (at +23 °C) |
| Accuracy (0.9 … 1.0 aw) [aw] | typically ±0.03 (at +23 °C) |
| Measuring Range (Process Temperature) [°C] | 0 … 125 |
| Temperature Accuracy [°C] | ±0.3 |
| Oil Temperature [°C] | -20 … +125 |
| Ambient Temperature [°C] | -20 … +70 |
| Pressure Range [bar] | up to 300 |
| Interfaces | 2× 4–20 mA analog output (3-wire), Modbus RTU (RS-485) |
| Power Supply [VDC] | 24 (10 … 36) |
| Protection Class | IP66 |
| EMC | according to DIN EN 61326-1 |
| Thread Material | 1.4404 |
| Perforated Cap Material | 1.4301 |
| Electrical Connection | M12, 8-pin |
| Installation Recommendation | In a permanent flow-through measuring point (continuous flushing of the measuring point) |
Reliable Moisture Monitoring in Technical Oils
Accurate Water Activity (aw) Measurement
The sensor measures water activity (aw) with high precision while simultaneously monitoring process temperature. Measurements are independent of oil type and age.
Calculation of Absolute Water Content (ppm)
For transformer oils, direct calculation of absolute water content in ppm is available, providing a clear assessment of insulating oil condition.
Flexible Outputs and Communication
Two freely configurable 4–20 mA analog outputs and a Modbus RTU (RS-485) digital interface ensure easy integration into monitoring and control systems.
Reliable Operation in Demanding Conditions
Industrial-grade construction with IP66 protection enables operation at oil temperatures up to 125 °C and pressures up to 300 bar, even in harsh industrial environments.
Ideal for Technical and Energy Oils
Suitable for measuring residual moisture in transformer, hydraulic, lubricating and engine oils, as well as diesel fuels.
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