THERMOCOUPLE EXTENSION WIRE

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THERMOCOUPLE EXTENSION WIRE

Application

Thermocouples are now widely used in every industrial field from chemicals, petrochemicals, metals, ceramics and electronics to aerospace. Although it is theoretically ideal to have a thermocouple connected directly to the instrument, long distance between them often makes the cost prohibitive and causes some troubles in the circuit. It is therefore desirable to use extension or compensating cables that have same or similar EMF characteristics to those of thermocouples. It is also necessary to change insulation cover materials according to the operating conditions.

Specifications

Characteristics Table for thermocouple wires
Kind & classes of thermocouple extension wires			Symbols and materials for thermocouples	Temp. Limits		Return Electric Resistance (Ω/m)	Color identification	Materials of extension
Symbols	Old symbols	Classification	Symbols and materials for thermocouples	Temp. Range (^oC)	Limits of error (^oC)	Return Electric Resistance (Ω/m)	Color identification	Positive (PX)	Negative (NX)
VX-G	WCA-G	Common class for General use	K Chromel / Alumel	-20~100	±2.5	0.8		Copper	Constantan (FNC-12)

TEMPERATURE SETTING AND CONDITIONS

Standards

Name

Limits of error

-20^oC

50^oC Oil bath

58.38^oC Sodium acetate

100^oC Water boiling

JIS

VX-G

±2.5

^+95.5

-777

_-96

^+103.5

2022

_-102.5

2369±103.5

4095±103.5

* Click to download datasheet [Thermocouple]