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It is almost certain that some amount of water is present in hydraulic and lubrication systems. Because of its destructive potential, hydraulic and lubrication systems are best operated with no free or emulsified water present. Water normally enters a system through external influences; the most common sources are moisture from the surrounding air entering through reservoir openings and breathers, condensation, “splash” from process water, system wash down water and contaminated new oil. Water contamination accelerates the aging process resulting in oxidation, hydrolysis, additive depletion, reduced lubricant film strength, corrosion and damaged components. Most of these expensive problems can be avoided by monitoring and controlling the operating fluid’s water content. A

SAE Grade Fuel Dilution (Diesel only) Viscosity @ 100° C Total Base Number Water contamination Glycol contamination Total Acid Number Soot percent by weight

SAE J300 D3524 ASTM D445 ASTM DZ846/4739 D1744 D2982 ASTM D974 & D664 Equivalent to ASTM E1131 (TGA)

Figure 1. Example of a sample oil specification. Water contamination *ASTM tests will express water in oil as a percentage or ppm .

Monitoring parts per million or Percent Water

The only acceptable and practical method for monitoring water in oil is to report water concentration as the current standards would report it and example being *ASTM tests. The EASZ-1 water in oil monitor is an online monitoring instrument that reports total water content in your oil at any temperature. The unit is loop powered and temperature compensated so that temperature fluctuations will not affect the dielectric measurements of the instrument. A large volume of oil passes through the compete cell area of the EASZ-1 and since the electronics have a response time of approximately one second, it is possible to know how much water is in your oil, every second of the day , 24 hours a day. It is important to measure total water in an oil process, whether it be dissolved water in oil or free water. The sensor must be robust and able to withstand measurements under free water conditions as well as dissolved water/oil conditions and not drift over time. The EASZ-1 is therefore the perfect instrument to measure water in oil whether synthetic or mineral. The units can be site re-calibrate if necessary against oils of known water content by Karl Fischer methods *ASTM tests or by bone dry oil.

ASTM D1744, a volumetric method, is reliable and precise, but there can be reproducibility problems at low water concentrations (200 ppm or less). Soaps, salts from wear debris and sulfur-based additives react with the Karl Fischer and can give a false positive. In fact, a new, clean, dry antiwear (AW) or extreme pressure (EP) oil may give a reading of as much as 200 to 300 ppm.

ASTM D6304, a coulometric titration method (Figure 6), is more reliable than D1744 at low water concentrations and is less prone to interference effects, although again, AW and EP additized oils can show as much as 100 ppm of water.

The most reliable method is ASTM D6304. The oil sample is heated under a vacuum so that any water present in the sample evaporates. Water vapors are condensed and dissolved into toluene, which is then titrated. Because the additives and other interfering contaminants remain in the oil, the condensed water in the toluene is a true indication of water present in the sample.

FEATURES/BENEFITS

EESIFLO MODEL EASZ-1 SPECIFICATIONS

GENERAL

Water in Oil range Recommended Flow Range Resolution Temperature compensation Temperature range Shipping Weight

0-10000ppm, 0-1%,0-3%,0-10% and 0-25% 5 to 150 LPM ±30 PPM Built in Temperature compensation 0-150 °C or 300 °F Approximately 1kg/3lbs

MECHANICAL

Cell Construction Material Pipe Connection Maximum Temperature Pressure Rating

316L 1 inch NPT thread (other threads/sizes available) 150 °C/300 °F 16 Bar /230 psi (higher pressure consult factory)

ELECTRICAL

Power Requirements Electronic Protection Operating Temperature Enclosure Outputs Options

Loop Power or 24 vdc IP 65 -40 °F -185 °F (-40 °C to 85 °C) Anodized Aluminium Epoxy Coated 4-20 mA DC , RS232 Full Duplex ,Optional RS485 Remote readout/display