Tensiometer CSC Scientific, a manufacturer and distributor of surface tension analysis products, announces a replacement for the now-discontinued Fischer Scientific Tensiomat© surface tension tensiometer. Any user who requires a new instrument or a repair of an existing instrument should contact us. May 04, 2011 After long deliberation, Fisher Scientific has discontinued its Tensiomat© surface tension tensiometer, which has been produced for decades...These perform the same tests and are a direct replacement for the Tensiomat©. The CSC models are the called the Precision and Interfacial Tensiometers. Readings are obtained from an upward pull through the sample. Interfacial Tensiometer Readings can be obtained from an upward pull or a downward push The CSC Interfacial Tensiometer is needed when calculating interfacial tension between a less-dense fluid and a heaver one located below the interface. The ring is rigidly attached to the measuring arm to obtain a downward measurement. We also recommend the Interfacial Tensiometer when the tested material is a thick liquid. This makes it easier to set up the ring below the liquid surface. A key component of any of these instruments is the duNouy ring, which is a precision device made of a platinum-based alloy. The rings are manufactured utilizing special forming and welding techniques unique to this alloy and can be used with existing Fisher Tensiomat© units. CSC Scientific has produced these rings for more than 50 years. We offer long-time users service and repair of these discontinued Fisher Scientific Tensiomat© units and will do so as long as replacement parts are available. The duNouy rings are fragile and are frequently dropped, misshapen or broken. CSC Scientific has maintained a ring repair service for many years and will repair Fisher-supplied rings. Either the CSC Precision or the CSC Interfacial Tensiometers can be used as direct replacements for the Tensiomat