Type B thermocouple cable, Pt30%Rh-Pt6%Rh

Thermocouple cable Type B is a thermocouple junction particularly used at extremely high temperatures. Type B, Pt30%Rh-Pt6%Rh has some similarities with type S and type R thermocouples, but has lower output than these types of thermocouples at temperatures below 600°C The temperature range of type B, Pt30%Rh-Pt6%Rh thermocouples is -870°C ..+1700°C.

Okazaki mineral insulated thermocouple cable type B

Wire types and tolerances Type B thermocouple

Wire type type B
-leg 6%Rh/Pt20%Rh/PtIr0.03þ/Au
+leg  30%Rh/Pt 40%Rh/Pt 40%Ir/Rh Chromel
Working temperature range (°C)continuous  200-1600 200-1700 1000-2100 1-300K
intermittent 200-1750 200-1850 – –
MIMS form 200-1450 200-1450 n/a n/a
ITS-90 tolerancesstandard limits  +/-0.5%
special limits +/-0.25%
IEC 584-2 tolerancesclass 1  – 8 10
class 2 +600 to +1700: ±0.25%

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