Patch test kit measures water and solid particulate contamination in fluid. Kit includes a vacuum pump to draw samples, microscope to view residual dirt, and Contamination Handbook with photos of known contamination and common particulate types and sources. Water sensing device is aluminum mixing vessel with builtin LCD microprocessor, which shows change in pressure in terms of parts per million or percentage by volume.

Schroeder Industries, (724) 318-1100, www.schroederindustries.com