Type J Teflon Thermocouple Wire, 20 AWG (100ft Roll)

Type J Teflon (PFA) Insulated Thermocouple Wire, 20 AWG Solid (100ft Roll)

Product Overview

This high-quality Type J thermocouple extension wire is essential for accurately transmitting temperature signals from a thermocouple sensor to your measurement or control device. This 100-foot roll features a 20 AWG solid conductor design with durable Teflon (PFA) insulation, ensuring signal integrity and reliability in demanding industrial environments.

What is Thermocouple Extension Wire?

Thermocouple extension wire is a critical component in temperature measurement systems. It's a less expensive wire that connects the thermocouple probe to instrumentation like a digital controller or recorder. To maintain measurement accuracy, the extension wire must be made from materials with the same thermoelectric characteristics as the thermocouple it's extending. For this Type J wire, the positive leg is Iron and the negative leg is Constantan.

Key Features and Specifications

• Thermocouple Type: J (Iron-Constantan)
• Wire Gauge: 20 AWG (American Wire Gauge)
• Conductor: Solid
• Length: 100-foot Roll
• Insulation Material: PFA (Perfluoroalkoxy), a type of Teflon®, provides excellent resistance to chemicals, abrasion, and moisture.
• Temperature Rating: PFA insulation is rated for continuous use up to 260°C (500°F).
• Color Coding: Conforms to ASTM/ANSI standards with a white positive leg (Iron), a red negative leg (Constantan), and a black overall jacket.
• Construction: Twisted pair design helps to minimize electromagnetic interference (EMI) from sources like motors and power lines, ensuring a cleaner signal.

Applications

Type J thermocouples and their corresponding extension wire are one of the most common and versatile types used across many industries. They are ideal for general-purpose applications in the lower to medium temperature range, including:

• Manufacturing and plastics processing
• Heat treating and furnace monitoring
• Food and beverage processing
• Testing and laboratory environments
• HVAC and environmental controls

When to Use Thermocouple Wire vs. Standard Copper Wire

It is crucial to use the correct type of wire for your sensor.

• Thermocouple Systems: The signal generated by a thermocouple is a very small voltage created by the junction of two dissimilar metals. Using standard copper wire to extend a thermocouple will introduce new junctions at the connection points, creating measurement errors. Therefore, you must use a matching extension wire (e.g., Type J for a Type J sensor).
• RTD Systems: Resistance Temperature Detectors (RTDs) work on the principle of changing resistance. They use standard copper instrumentation cable to transmit their signal.
• Systems with Transmitters: If a 4-20mA transmitter is installed directly in the sensor's connection head, it converts the sensor's signal to a robust current signal. In this case, standard copper wire is used to run from the transmitter to the control equipment.

Pyromation's Wiring Solutions

Pyromation is a leading provider of temperature measurement solutions. We stock a comprehensive range of thermocouple grade and extension wires in various gauges and insulation types. We also offer specialized cables, including multi-pair extension wire and custom constructions to meet your exact specifications.

Common Thermocouple Types (ASTM/ANSI Designations):

• Type K: Chromel/Alumel
• Type J: Iron/Constantan
• Type T: Copper/Constantan
• Type E: Chromel/Constantan
• Type N: Nicrosil/Nisil
• Type S: Platinum/Platinum (10% Rhodium)
• Type R: Platinum/Platinum (13% Rhodium)
• Type B: Platinum (6% Rhodium)/Platinum (30% Rhodium)

Product Details

Model: J20-1-507 Description: Pyromation Type-J Teflon Thermocouple Wire, 20 AWG Solid, 100ft. Roll.