The thermocouple compensation wire is used to extend the hot electrode, that is, to extend the cold end of the thermocouple, and to connect with the display instrument to form a temperature measurement system. It is usually composed of compensation wire Alloy Wire, insulation layer, jacket and outer sheath.
The thermocouple compensation wire can be divided into two kinds according to the tolerance of thermoelectric characteristics: precision and ordinary. According to the use of temperature range is divided into general use and heat resistant. According to the structure, it is divided into single strand core and multi-strand core two.
Insulation and Sheath | Working Temperature | |
Material | Symbol | |
Polyvinyl Chloride | PVC | -25~105℃ |
Polyperfluorinated Ethylene Propylene | FEP | -60~205℃ |
Soluble Polyteflon | PFA | -60~260℃ |
Example:
KX-HA-FFRP-2 * 1.5
12-34-5678-9
K: nickel-chromium-nickel-silicon
J: Iron-copper-nickel
B: Platinum-rhodium 30-platinum-rhodium 6
S: Platinum rhodium 10-platinum
R: Platinum rhodium 13-platinum
N: Nichrome silicon - Nichrome silicon
E: nickel-chrome-copper-nickel
T: Copper-copper-nickel (Concopper)
X: Extension type
C: Compensation type
G: General use
H: Heat resistance
A: Precision grade
B: Ordinary grade
V: Polyvinyl chloride
F: Polytetrafluoroethylene
V: Polyvinyl chloride
B: No alkali glass filament
F: Polytetrafluoroethylene
R: Multi-strand cord
P: Shielded type (stainless steel braided,tinned copper wire or galvanized steel wire or aluminum-plastic composite tape)
Logarithm*sectional area
Usage classification | section(mm)2 | Single strand core | Multiple strands of flexible wire(R) | Insulating layer | sheath | outer diameter limit(mm) | |||||
Number of core strands(pcs) | Single wire diameter(mm) | Number of core strands(pcs) | Single wire diameter (mm) | thickness (mm) | thickness (mm) | flat type | Shielded flat type | ||||
Single strand core | Multi-strand core | Single strand core | Multi-strand core | ||||||||
General use G | 0.5 | 1 | 0.80 | 7 | 0.30 | 0.5 | 0.8 | 3.7×6.4 | 3.9×6.6 | 4.5×7.2 | 4.7×7.4 |
1.0 | 1 | 1.13 | 7 | 0.43 | 0.7 | 1.0 | 5.0×7.7 | 5.1×8.0 | 5.8×8.5 | 5.9×8.8 | |
1.5 | 1 | 0.37 | 7 | 0.52 | 0.7 | 1.0 | 5.2×8.3 | 5.5×8.7 | 6.0×9.1 | 6.3×9.6 | |
2.5 | 1 | 1.76 | 19 | 0.41 | 0.7 | 1.0 | 5.7×9.3 | 5.9×9.8 | 6.5×10.1 | 6.7×10.7 | |
Heat resistance H | 0.5 | 1 | 0.80 | 7 | 0.30 | 0.5 | 0.5 | 2.9×5.0 | 3.0×5.2 | 3.7×5.8 | 3.8×6.0 |
1.0 | 1 | 1.13 | 7 | 0.43 | 0.5 | 0.5 | 3.5×5.7 | 3.7×6.1 | 4.3×6.5 | 4.5×6.9 | |
1.5 | 1 | 1.37 | 7 | 0.52 | 0.5 | 0.6 | 4.0×6.5 | 4.2×6.9 | 4.8×7.3 | 5.0×7.7 | |
2.5 | 1 | 1.76 | 19 | 0.41 | 0.5 | 0.6 | 4.5×7.3 | 4.8×7.9 | 5.3×8.1 | 5.6×8.7 |