Description
- Reliable
- Patented product, compatible with various oils
- Sensor lifespan up to 10 years
- High efficiency: <5mA@24Vdc
- Unique grounding protection and signal sampling unit
- Accurate
- Imported sensing chip, unique temperature compensation algorithm
- Water activity accuracy: ±2%; temperature accuracy: ±0.3°C
- Traceable calibration certificate from national metrology institute
- Robust
- IP66 protection, full stainless-steel body
- Reverse polarity protection, industrial isolation
- Wide power input: 9–36VDC
- Easy to Use
- G1/2” BSP standard interface, easy installation
- Local digital output and calibration port
- Built-in calibration curves for various oils
| Temperature | |
| Measuring range | -40 … 120 °C |
| Accuracy (@25°C) | ±0.3°C |
| Resolution | 0.1°C |
| Water Activity | |
| Measuring range | 0 … 1aw |
| Accuracy | 0…0.6: ±0.02aw; |
| 0.6…1: ±0.03aw | |
| Resolution | 0.001aw |
| Dissolved Water (calibrated per oil type) | |
| Measuring range | 0…2000ppm or customized |
| Accuracy | ±10% or 10ppm (whichever is greater) |
| Resolution | 1ppm |
| Dielectric Constant | |
| Measuring range | 1…6 |
| Accuracy | ±0.1 |
| Resolution | 0.001 |
| Free/Emulsified Water | |
| Measuring range | 0…10% or customized |
| Accuracy | ±0.5 % |
| Resolution | 0.10% |
| General | |
| Mechanical interface | G1/2” ISO |
| Signal output | RS485 MODBUS RTU |
| Ambient temperature | -40 … +80 °C |
| Allowed oil temp | -40 … +80 °C |
| Probe pressure | 20bar (customized on request) |
| Probe material | 316 & 304 stainless steel |
| Protection class | IP65 |
| Power supply | 10–28V DC |
| Supply current | <20mA@DC24V |
| Transmitter weight | 200g |
| Total package weight | 270g |
| Package dimensions | 172*117*53 mm (carton) |
| Connector | GX16, 5-pin |
| Cable | 4-core, 2 m, UL20866 4×22AWG |
| EMC standards | EN61326-1, EN61000-3, EN61010 Class B |
- Oil fields, oil refining
- Wind, hydro, thermal, nuclear power, power transmission
- Engineering machinery
- Aviation, marine
- Railway, highway transportation
- Iron and steel, metallurgy
- Oil storage, fuel stations
- Industrial production lines
Applicable Oils：
- Lubricating oil
- Hydraulic oil
- Gear oil
- Engine oil
- Fuel oil
- Insulating oil
- Turbine oil
- Various light oils, heavy oils, etc.
- Water Activity (aw, 0…100%)
The ratio of actual moisture content to saturated moisture content in oil at the current temperature (range: 0…1 aw).
- 0 aw: no water in oil
- 1 aw (100% RH): dissolved water is saturated; free water will precipitate.
- Dissolved Water (ppm, Parts Per Million)
Mass or volume ratio of dissolved water in oil.
- Mass ratio: mg/kg
- Volume ratio: μl/L
According to GB/T7600-2014, the unit is mg/L. Conversion: 58 ppm × 0.86 g/ml = 50 mg/L (0.86 g/ml = oil density).
- Free Water & Emulsified Water (%)
Forms when dissolved water reaches saturation (aw=1). Expressed in % (e.g., 2% = 2 parts water in 100 parts oil-water mixture).
Dissolved Water
Water present at the molecular level. Related to base oil type, additives, and temperature. Oil appears clear before saturation.
Free Water
Formed when dissolved water precipitates (due to cooling) or external water intrudes. Water droplets sink to the tank bottom.
Emulsified Water
Formed when free water is intensely agitated or sheared, creating micro-droplets suspended in oil. Oil turns cloudy/white and causes severe system damage.
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