Profile: Louis C. Eitzen Co., Inc., specializes in offering pocket viscosity comparator, and portable brinell meter. The brands we offer include Visgage™. Our Visgage™ pocket viscosity comparator can be used to check any oil from a light spindle oil to heavy gear oils. It is ideal for railroads, truck & bus lines, marine fleets, power plants, laboratories and oil distributors. Eitzen portable brinell meter is a portable apparatus for the accurate determination of the hardness of metals and metal products, independent of their dimensions.