Introduction
The GESERCO UltraPreciWaterTest™ and PreciWaterTest™ are devices designed for precise and cost-effective measurement of water content in non-volatile liquids, such as oils and fuels. These devices conform to ISO9114:1997, AFNOR NF-T60-640, and GFC TR-40-A-14 standards.

Specifications
The PreciWaterTest™ and UltraPreciWaterTest™ are reference apparatuses for water content measurement. They feature an ergonomic design suitable for lubricants with high additive loads and a robust design to protect glassware during analysis. The devices use the "Aquatest" measurement principle, where a chemical reagent converts water traces in the sample into gas, measured by a burette graduated in %H₂O or ppm H₂O.

Importance of Water Content Measurement
Water in oils can cause machinery failure by degrading lubricating properties, narrowing the lubricating film, increasing oxidation and acidity, reducing additive efficiency, accelerating surface fatigue, corroding components, and promoting microbial growth.

Field and Laboratory Use
The PreciWaterTest™ - UltraPreciWaterTest™ kits are portable and use non-hazardous "WT/NH" reagents, making them suitable for field use. GESERCO pioneered portable lubricant testing kits in 1973, allowing users to check oil and fuel conditions on-site.

Metrological Specifications
Product codes for PreciWaterTest are WT9005 - WT9034 and for UltraPreciWaterTest are WT9036 - WT9003. The kits include accessories and reagents for 50 tests. The UltraPreciWaterTest measures 0 - 0.09 %H₂O, while the PreciWaterTest measures 0 - 0.7 %H₂O. Extended ranges are available by varying sample volume.

Design and Accuracy
The apparatus is housed in a portable wooden cabinet for field use or mounted on a test stand for laboratory use. The PreciWaterTest has an accuracy of ± 25 PPM from 0 to 0.1 %H₂O and ± 100 PPM from 0.1 to 0.7 %H₂O. The UltraPreciWaterTest has an accuracy of ± 5 PPM from 0 to 0.02 %H₂O and ± 10 PPM from 0.02 to 0.09 %H₂O.

Conclusion
The PreciWaterTest™ and UltraPreciWaterTest™ provide efficient solutions for lubricant analysis, enabling early detection of potential breakdowns and reducing operating costs.