For temperature measurement in the range, -200c to + 850c resistance temperature detector (rtd) is preferred to thermocoupleand other sensors because of its higher accuracy, reliability, compact size and faster response. Rtds find use in almost all industrieslike plastic and rubber processing, food industries, pharmaceuticals, chemical & petrochemical plants, and power plants. It is also usedin diesel engines & ships, process control and laboratories for temperature measurement and control.Rtds are available with single or double resistance elements and in 2, 3 or 4 wire circuits. Various types of protection sheaths forprotection of the element and screw-in threaded bushes either fixed (welded) or adjustable by screws (for non-pressure application)or by compression fitting (for pressure application) for mounting are available. Features:high accuracy and stabilitywide temperature range; -200c to +850cfast response & high insulation resistanceneeds only copper cables for long runs.