Durex Industries, Cary, Illinois, manufactures an RTD temperature sensors specifically designed for liquid or semi-solid immersion applications. The protective housing is of 304 SS or 316 SS depending on the process material. This design can be ideally suited for high-pressure applications reaching 5000 PSI. Various lead wire materials and constructions can be used for abusive environments of UL/CSA requirements. Lead wire configurations are available in 2-, 3- and 4-wire designs. Platinum and nickel are the primary element materials for RTD's. Tolerances for RTD assemblies conform to DIN 43760, IEC 751, (class A and B) and JIS 3920 specifications.