Measure both the surface and interfacial tension of liquids. Range is 0 to 90 dyne/cm. Measurement values are reproducible to within 0.05 dyne/cm. These meters are specified for determining interfacial tension of oil against water by the ring method in ASTM D971, solutions of surface-active agents in ASTM D1331, testing synthetic rubber lattices in ASTM D1417, and determining surface tension of industrial water/wastewater in ASTM D1590.
Model 59951-20 reads surface tension and upward interfacial tension. Features graduated dial readings in both directions from 0 to 90 dyne/cm and a double vernier. Both the scales and the corresponding verniers have graduations and figures in different colors to indicate whether the force is in an upward or downward direction.