CSC Du Nouy Interfacial Tensiometer. Measures both upward and downward forces. Featuring: RAPID MEASUREMENT;Ring method allows readings to be made in 15-30 seconds. DIRECT READING; Circular scale is graduated in dynes/cm eliminating the need for mathmatical calculations. REPRODUCIBLE RESULTS; Improved technique allows accurate readings to be reproduced within +-0.05 dyne/cm. PORTABILITY; Compact unit comes with a carrying case for easy transport. STABILITY; Unit is mounted on a cast tripod support with convenient leveling screws.