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High Precision Type K Thermocouple Alloy Wire 0.5mm KP KN Wire
Thermocouple wire allows temperatures to be measured
electronically. A typical thermocouple construction consists of a
pair of dissimilar metals that are electrically joined together at
the sensing point and connected to a voltage measuring instrument
at the other end. When one junction is hotter than the other, a
thermal "electromotive" force (in millivolts) is produced that is
roughly proportional to the difference in temperature between the
hot and cold junctions.
NiCr-NiSi (Type K) thermocouple wire finds the widest use in all
basemetal thermocouple, at temperature above 500 °C.
Type K thermocouple wire has strong resistance to oxidation than
other base metal thermocouples. It has high EMF against Platinum
67, excellent temperature accuracy, sensitivity and stability, with
a low cost. It is recommended for oxidizing or inert atmospheres,
but cannot be used directly in the following cases:
(1) Alternatively oxidizing and reducing atmosphere.
(2) Atmosphere with sulphur gases.
(3) Long time in vacuum.
(4) Low oxidizing atmosphere such as hydrogen and carbon monoxide
atmosphere.
Detailed Parameter
Chemical Composition for thermocouple wire | |||||
Conductor Name | Polarity | Code | Nominal Chemical Composition /% | ||
Ni | Cr | Si | |||
Ni-Cr | Positive | KP | 90 | 10 | -- |
Ni- Si | Negative | KN | 97 | -- | 3 |