Assessing Product Reliability Through Temperature Cycling... 04 Dec 2008: The FTS ThermoJetâ„¢ from SP Industries, Inc. is a precision-controlled temperature forcing system designed to rapidly change the temperature of a product or device under test. Temperature or thermal cycling is a proven method used to rapidly assess the reliability of products. A product which is alternately heated and cooled stresses any component that has a thermal expansion mismatch. SP Industries Inc