Transcription of Thermocouple Selection Guide - RS Components
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Thermocouple Selection Guide - RS Components
Thermocouple Selection (UK) (International)HeaderDiscover more Thermocouple Thermometry - At a Glance 60584-1 : 2013 / BS EN 60584-1 : 20131 for t < 1100 C,[1 + 0,003 x (t - 1100)] for t > 1100 CDiscover more of Sensor Types Thermocouple Platinum Resistance Thermometer Thermistor Sensor Thermoelement, two dissimilar metals/alloys Platinum-wire wound or flat-film resistor Ceramic (metal oxides) Accuracy (typical values) to C to C to C Long term Stability Variable, Prone to ageing Excellent Good Temperature range -200 to1750 C -200 to 650 C -100 to 300 C Thermal response Sheathed slow Exposed tip fast to 10 secs typical Wirewound slow Film faster 1-50 secs typical generally fast to secs typical Excitation None Constant current required None Characteristic Thermovoltage PTC resistance NTC resistance (some are PTC)
Sheath materials range from mild and stainless steels to refractory oxides (ceramics, so called) and a variety of exotic materials including rare metals. The choice of sheath must take account of operating temperature, media characteristics, durability and other considerations including
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