WS10 Series Water Sensor product photo Primary L

WS10 Series Water Sensor

For Measurement of Water Content in Oil

The Pall WS10 Series water sensor is an ideal, low-cost, in-line, monitoring solution for measuring dissolved water content in hydraulic, lubricating and insulating fluids. Specifically designed for use in harsh and often remote industrial environments, readings are transmitted continuously to the user's control systems as a key component in the predictive maintenance of plant and machinery.

Features

  • A sensing probe directly immersed in the fluid to monitor dissolved water content and temperature
  • Water content output in % saturation
  • Temperature in °C or °F
  • High pressure option up to 100 bar (1450 psi)
  • Simple and flexible installation, simple to operate
  • Robust all in-one modular housing and sensing probe design
  • Two analogue outputs, 4 - 20 mA, for connections to existing SCADA and DCS systems

The Effect of Water in Oil

Water contamination in fluids can cause numerous problems such as additive depletion, oil oxidation, corrosion, reduced lubricating film thickness, microbial growth, and reduction of dielectric strength. These costly problems can be averted with continuous monitoring of oil water content so that timely action can be implemented.

Hydraulic, lubricating and insulating fluids should be operated without the presence of free water and with dissolved water levels at 50 % saturation or considerably lower in the case of insulating oils.

Water Content Measurement in Oil

PPM

The common industry practice has been to report water content in oil in terms of parts per million (PPM). Most fluids can tolerate a certain degree of water contamination, but at what level is it considered excessive? 200 PPM of water in a phosphate ester based oil would be excellent. However, the same amount would be catastrophic in a transformer oil.

% Saturation

An alternate way to report water content is as a percentage of the water saturation level of the fluid for a given temperature. One advantage of this method is that it provides a better measure of how close the water content is to the water saturation level of the oil and hence, the formation of free water in the fluid. The WS10 water sensor reports the presence of dissolved water in oil in the range of 0 % to 100 % of saturation. If an oil is cloudy due to free water contamination at the measurement temperature, the WS10 Water Sensor will display 100 % saturation, until steps are taken to bring the water content below the saturation point.

Simple Installation

The Water Sensor enclosure is designed in modular form for safe and convenient installation. The M12 connector allows for electrical wiring of the Water Sensor for power and sensor output. Each section of the enclosure fits securely to achieve at least IP65 (NEMA 4) moisture protection rating.


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Description

For Measurement of Water Content in Oil

The Pall WS10 Series water sensor is an ideal, low-cost, in-line, monitoring solution for measuring dissolved water content in hydraulic, lubricating and insulating fluids. Specifically designed for use in harsh and often remote industrial environments, readings are transmitted continuously to the user's control systems as a key component in the predictive maintenance of plant and machinery.

Features

  • A sensing probe directly immersed in the fluid to monitor dissolved water content and temperature
  • Water content output in % saturation
  • Temperature in °C or °F
  • High pressure option up to 100 bar (1450 psi)
  • Simple and flexible installation, simple to operate
  • Robust all in-one modular housing and sensing probe design
  • Two analogue outputs, 4 - 20 mA, for connections to existing SCADA and DCS systems

The Effect of Water in Oil

Water contamination in fluids can cause numerous problems such as additive depletion, oil oxidation, corrosion, reduced lubricating film thickness, microbial growth, and reduction of dielectric strength. These costly problems can be averted with continuous monitoring of oil water content so that timely action can be implemented.

Hydraulic, lubricating and insulating fluids should be operated without the presence of free water and with dissolved water levels at 50 % saturation or considerably lower in the case of insulating oils.

Water Content Measurement in Oil

PPM

The common industry practice has been to report water content in oil in terms of parts per million (PPM). Most fluids can tolerate a certain degree of water contamination, but at what level is it considered excessive? 200 PPM of water in a phosphate ester based oil would be excellent. However, the same amount would be catastrophic in a transformer oil.

% Saturation

An alternate way to report water content is as a percentage of the water saturation level of the fluid for a given temperature. One advantage of this method is that it provides a better measure of how close the water content is to the water saturation level of the oil and hence, the formation of free water in the fluid. The WS10 water sensor reports the presence of dissolved water in oil in the range of 0 % to 100 % of saturation. If an oil is cloudy due to free water contamination at the measurement temperature, the WS10 Water Sensor will display 100 % saturation, until steps are taken to bring the water content below the saturation point.

Simple Installation

The Water Sensor enclosure is designed in modular form for safe and convenient installation. The M12 connector allows for electrical wiring of the Water Sensor for power and sensor output. Each section of the enclosure fits securely to achieve at least IP65 (NEMA 4) moisture protection rating.
Applications
There are numerous applications for the WS10 Water sensor, including:
  • Primary Metals
    Rod Mill High Speed Lube Systems
    Cold Mill Tandem Mill
    Tilt Furnace HPU's
  • Power Generation
    Wind Turbine Gear Box Lube
    Main Turbine Lube Oil
    Transformer Oil
  • Pulp and Paper
    Dryer Section Lube Systems
    Wet End Lube Systems
    Press Section Hyd/Lube Systems
    Powerhouse - Steam Turbine Lube Systems
  • Marine
    Main propulsion lubrication
    Hydraulic active fin stabilization
  • Industrial In-plant
  • Automotive
  • Offshore / Petrochemicals
Specifications
 
Supply Voltage 21-28 VDC (requires ≥ 200 mA))
Working Temperature Range
Sensing Probe - 40 °C to 125 °C (-40 °F to 275 °F)
Electronics - 40 °C to 80 °C (-40 °F to 176 °F)
Fluid Compatibility Petroleum based and synthetic fluids. The water sensor is not to be used in water based fluids or aerospace phosphate ester hydraulic fluids.
Pressure Range
Standard Model Up to 20 bar (290 psi)
High Pressure Model Up to 100 bar (1450 psi)
Probe Connector 12 in. NPT (male) or 12 in. BSPP (male)
Electrical Connector M12 - included in scope of supply
Accuracy
Humidity Sensor ± 2 % 0 to 90 % RH and ± 3 % 90 to 100 % Traceable to international standards, administered by NIST, PTB, BEV
Temperature Sensor Pt 1000 (Tolerance Class A, DIN EN60751)
Enclosure IP65 (NEMA 4)
Weight 0.43 kg (0.95 lb)
Calibration Services Available from Pall; contact your local representative
Outputs 4-20 mA Load < 500 Ohm
OUT 1 = 0 to 100 % RH
OUT 2 = -25 to 125 °C (-13 to 257 °F)
 



M12 Connector Configuration
(IEC 61076-2-101)

M12 Connector Configuration (IEC 61076-2-101)
Type
Testing and Monitoring
Use
Testing, Monitoring
Ordering Information
Water Sensor P/N: WS10 S [1] [2]

Table 1: Relay Options

 
Code Probe Options
B08 12 NPT connector
C08 12 BSPP connector
 

Table 2: Probe Options

 
Code Pressure Options
None 20 bar (290 psi) Standard
H 100 bar (1450 psi) High Pressure