Barnant GV-2100 Falling Ball Viscometer, Size 1 Falling ball viscometer with two size #1 balls of different densities for measurement of the dynamic viscosity of transparent Newtonian fluids Glass ball for 0.2 to 2.0 centipoise (cP) range and 316 stainless steel ball for 1.0 to 10cP range, optional tantalum ball (sold separately) for 2.0 to 20cP range Uses 7mL sample size Closed system for highly evaporative and hydroscopically deteriorative solutions Wetted materials of glass, Viton, and Delrin acetal for corrosion resistance