BIS Certification for Heat Exchanger and Temperature Sensing Controls : Heat exchangers are used in both cooling and heating processes as heat exchanger is a system used to transfer heat between two or more fluids. Temperature sensing controls are used to measure process conditions and adjust the rate of heating to deliver the heating profile desired for the product. Heat Exchanger and Temperature Sensing Controls are mandatory to be tested and registered under Indian Standards : IS 11329 and IS 60730 as per Bureau of Indian Standards.