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

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

Precision Signal Transmission for Your Thermocouple Sensors

Thermocouple extension wire is vital for accurately transmitting the low-voltage signal generated by a thermocouple sensor to your measurement or control device. It ensures that the temperature reading maintains its integrity and accuracy over distance, preventing signal degradation that could lead to erroneous data.

Key Principle: Material Matching is Critical For precise temperature measurement, the materials used in your thermocouple extension wire must exactly match the thermoelectric characteristics of the positive and negative legs of the thermocouple type (e.g., Type J, K, T, E, N, R, S, B) being employed. This exact match is essential because any mismatch in material composition at connection points can introduce parasitic thermoelectric junctions, creating additional voltages that distort the true temperature reading. This adherence to ASTM/ANSI standards ensures consistent and reliable performance across your system.

Distinguishing Thermocouple Wire from Other Sensor Wiring:

• Thermocouple Extension Wire: Specifically designed with alloys that mimic the thermocouple's properties to maintain signal accuracy.
• Transmitter Applications: If a temperature transmitter (e.g., 4-20mA output) is integrated directly into the thermocouple sensor assembly, standard copper instrumentation wire is then used to carry the converted, scalable signal back to the process control equipment. This is because the transmitter has already converted the thermoelectric signal into a robust electrical current.
• RTD Sensors: Resistance Temperature Detectors (RTDs) operate on a different principle (resistance change with temperature). They require ordinary copper instrumentation cable to transmit their resistance signal. Similar to thermocouples with transmitters, if an RTD transmitter is installed, copper wire carries the 4-20mA signal.

Pyromation: Your Source for High-Quality Thermocouple Wire

Pyromation offers a comprehensive selection of thermocouple grade and extension wire, available in various sizes and gauges, along with essential wire insulators. We specialize in robust, high-performance wiring solutions, including custom-constructed thermocouple wire and RTD cable, as well as multi-pair thermocouple extension wire for complex installations. All our wires are manufactured to meet stringent ASTM/ANSI designations for calibration, guaranteeing reliability and performance.

Common Thermocouple Types and Their Designations:

• Chromel®/Alumel®: ASTM/ANSI Type K (Nickel-Chromium/Nickel-Aluminum)
• Iron/Constantan: ASTM/ANSI Type J (Iron/Copper-Nickel) - Ideal for general purpose applications in reducing atmospheres.
• Copper/Constantan: ASTM/ANSI Type T (Copper/Copper-Nickel)
• Chromel®/Constantan: ASTM/ANSI Type E (Nickel-Chromium/Copper-Nickel)
• Nicrosil®/Nisil®: ASTM/ANSI Type N (Nickel-Chromium-Silicon/Nickel-Silicon)
• Platinum/Platinum (10% Rhodium): ASTM/ANSI Type S
• Platinum/Platinum (13% Rhodium): ASTM/ANSI Type R
• Platinum (6% Rhodium)/Platinum (30% Rhodium): ASTM/ANSI Type B

Product Description

Pyromation J20-1-304 Type-J Fiberglass Thermocouple Wire, 20 AWG - 100ft. Roll

This high-quality Type J thermocouple wire features durable fiberglass insulation, making it suitable for applications requiring moderate temperature resistance and mechanical protection. With a 20 AWG gauge, it offers a good balance of flexibility and signal integrity, supplied in a convenient 100-foot roll for easy deployment.