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Information given here is for general guidance only and is not definitive – it is not intended to be the basis for product installation or decision making.   Labfacility Ltd cannot be held responsible for any misinterpretation or incorrect assumptions based on these Questions and Answers.   1. What is the difference between a Mineral Insulated (MI) and a fabricated sheath? An MI is flexible, a fabricated sheath is rigid.   2. How accurately can I measure temperature us ...
Thermocouple types can be subdivided in 2 groups, base metal and rare (noble) metal:   -200°C up to 1200°C – These thermocouples use base metals   Type K – Chromel-Alumel The best known and dominant thermocouple belonging to the group chromium nickel aluminium is type K. Its temperature range is extended (-200 up to 1100°C). Its e.m.f./ temperature curve is reasonably linear and its sensitivity is 41µV/°C   Type J – Iron-Constantan ...
Although thermocouple assemblies are primarily tip sensing devices, the use of protection tubes (sheaths) renders surface sensing impractical. Physically, the probe does not lend itself to surface presentation and stem conduction would cause reading errors. If a thermocouple is to be used reliably for surface sensing, it must be in either exposed, welded junction form with very small thermal mass or be housed in a construction which permits true surface contact whilst attaching to the surface. ...

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