The Zeitfuchs Cross-Arm Viscometer (ZCAC) measures kinematic viscosity of transparent and opague Newtonian liquids according to ASTM D445 and ISO 3104. Filling and cleaning does not require removal from the constant temperature bath. Minimum sample volume is 1 to 3 mL. Minimum bath depth is 230 mm (9 in). Unity factor series has a constant within ± 0.2% of the values listed. Viscometers are provided with a certificate of calibration and instruction sheet. Permanently attached round or rectangular metal holders are included or may be ordered separately.