Electro-Tech Systems, Inc. (ETS) introduces its new family of resistivity probes for measuring non-conforming surfaces: Models 821, 822 and 823. In the past, testing of ESD materials was performed on flat samples, and testing of a finished product was not practical. Electro-Tech`s probes utilize gold-plated, spring-loaded pins with waffle tips for surface contact. The ETS probes can accommodate curved, flat, angled or combination surfaces, offering the ability to test products in a finished state, thus assuring tighter control of the manufactured product. The Model 821 is available in 3/8-in; the 822 in 1-in, and the Model 823 in 2.5-in sizes. Custom sizes are also available.