Switzer Instrument Limited manufactures Switzer Temperature Instruments. Switzer Instrument Limited is an ISO 9001:2000 registered company. Switzer Temperature Instruments are available in various types ranging from switches employing filled system and thermocouple sensors to digital controllers and indicators using RTD and thermocouple sensors. The product range supports both negative and positive temperature. They act as a complete end-to-end solution provider and are used to address the tracking, tracing and controlling needs of all businesses like manufacturing, logistics, automotive and energy.