Jiangsu Plaza Premium Electric Instrument Co.,Ltd.(HY)
Product description
Thermocouple extension wire is used to extend the thermode, that is, the cold junction of the movable thermocouple connect with indicating instrument to make up temperature measurement system.
Extension wire falls into two kinds; one is extension type and the other is compensation type. The wire same with the two thermocouple wires of the Graduation Mark, is know as the extension type. The wire same with, formed by cooper—-cupronickel materials with different proportion, is called compensation type.
The two kinds of extension wire, both have good property of resistance to acid, alkali, abrasion and fire. It’s temperature range used commonly is -25-400C. In addition, it can be used for a long time by immersing into the oil. The extension wire complies with GB/T4989-94-2016 standard.
The extension wire types can be divided into WC, BC,SC, RC, NX, KC, KX, EX, JX and TX in accordance with the product type.
Silicone rubber insulated thermocouple extension wire– Single pair
. Continuous use up to 180°C
. Short term use up to 250°C
. Good electrical and mechanical properties
. Good flame retardance and moisture resistance
Silicone rubber Physical Properties
| Characteristics | Insulation | Jacket |
| Abrasion Resistance | Excellent | Excellent |
| Flexibility | Excellent | Excellent |
| Moisture Resistance | Good | Good |
| Weatherability | Excellent | Excellent |
| Service Temperature | 180°C continuous250°C single | 180°C continuous250°C single |
| Flame Test | Self-extinguishing | Self-extinguishing |
Color Code & Initial Calibration Tolerance for Thermocouple Extension Wire:
| Thermocouple extension type | Thermocouple extension type | ANSI Color Code | ANSI Color Code | Initial Calibration Tolerances | Initial Calibration Tolerances | Initial Calibration Tolerances |
| Wire Alloys | Calibration | Conductor (+/-) | Jacket | Temperature Range | Standard Limits | Special Limits |
| Iron (+) vs. Constantan(-) | JX | White/Red | Black | 0°C to +200°C | ± 2.2°C | ± 1.1°C |
| Chromel (+) vs. Alumel (-) | KX | Yellow/Red | Yellow | 0°C to +200°C | ± 2.2°C | ± 1.1°C |
| Copper(+) vs. Constantan(-) | TX | Blue/Red | Blue | -60°C to +100°C | ± 1.1°C | ± 0.5°C |
| Chromel(+) vs. Constantan(-) | EX | Purple/Red | Purple | 0°C to +200°C | ± 1.7°C | ± 1.1°C |
| Nirosil (+) vs. Nisil (-) | NX | Orange/Red | Orange | 0°C to +200°C | ± 2.2°C | ± 1.1°C |
| Copper (+) vs. Alloy 11 (-) | RX/SX | Black/Red | Green | 0°C to +200°C | ± 5°C | – |
| Copper S (+) vs. -Copper E (-) | BX | Gray/Red | Gray | 0°C to +200°C | ± 3.7°C | – |
Nominal Insulation Thickness:
| Wire Size (AWG) | Conductor Insulation Thickness (mm) | Jacket Insulation Thickness (mm) | Outer Diameter (mm) |
| 20 | 0.40 | 0.80 | 5±0.20 |
| 20 7/28 | 0.40 | 0.80 | 5±0.20 |
| 24 | 0.40 | 0.80 | 4.2±0.20 |
| 24 7/32 | 0.40 | 0.80 | 4.2±0.20 |
| 26 | 0.35 | 0.80 | 4.0±0.20 |
| 28 | 0.35 | 0.80 | 4.0±0.20 |
| 30 | 0.35 | 0.80 | 3.6±0.20 |
Applications
* Metallurgy
* Chemical industry, petroleum
* Power generation
* Defense and scientific research
* Cables for connection between thermocouples and temperature display instrument.
Features
1) Continuous use up to 180℃
2) Short term use up to 250℃
3) Excellent heat, chemical, abrasion and moisture resistance
4) Provides accurate temperature measure with high temperature stability
5) Calibration test report is available
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