Thermocouple Temperature Probes

The response of a thermocouple probe of temperature versus time can be graphed as an exponential function. One time constant is defi ned as the time required to reach 63.2% of the temperature change. Two time constants is 86.5% and three is 95% of the temperature change. At Cooper-Atkins, the response time is stated at three time constants of the temperature change. Response times are intended as a general guideline and can diff er in actual usage conditions. Any testing done at the factory is under controlled conditions.

Thermocouple Types: The probe thermocouple type J, K, or T must match that of the instrument. Specifi cations shown are for thermocouple Type K models. Most probes are also available in thermocouple types J and T. In some cases, the upper temperature limits for types J and T may diff er from that shown.

Accuracy Tolerances for Standard Thermocouples (A.N.S.I. MC 96.1 - 1982)

Type K Thermocouples
Above 32°F or 0°C: ±0.75% of reading (or ±4°F (2.2°C) whichever is greater) to 2,282°F (1,250°C)
Below 32°F (0°C): ±2.0% of reading (or ±4°F (2.2°C) if greater) to -328°F (-200°C)

Type J Thermocouples
Above 32°F or 0°C: ±0.75% of reading (or ±4°F (2.2°C) whichever is greater) to 1,382°F (750°C)
Below 32°F (0°C): No A.N.S.I. specification.

Type T Thermocouples
Above 32°F or 0°C: ±0.75% of reading (or ±1.8°F (1.0°C) whichever is greater) to 662°F (350°C)
Below 32°F (0°C): ±1.5% of reading (or ±1.8°F (1.0°C) if greater) to -328°F (-200°C)

Avoid over-stretching or kinking the probe cables for longest life of the probe
Detach probe from the instrument by holding the plug firmly, DO NOT PULL PLUG OUT BY THE CABLE

Cable Types:

Flexible Cable with PVC Jacket: PVC insulation on primaries and outer jacket. PVC offers good abrasion and chemical resistance
Coiled Retractable Cable: Polyurethane outer jacket. PFA Teflon® insulation on primaries. Polyurethane offers excellent abrasion resistance and good chemical resistance
Flexible Cable with Teflon® Jacket FEP Teflon® insulation on primaries and outer jacket. Teflon® offers excellent abrasion and chemical resistance
Flexible Cable with Fluoroelastomer Jacket: Custom, patented Cooper-Atkins cable with Kevlar® fillers and metal braid for strength. Fluoroelastomer offers outstanding abrasion and chemical resistance.
Flexible Armored Cable: FEP Teflon® jacketed cable protected by stainless steel flexible armored hose. The armored hose protects the cable and offers outstanding abrasion, cut and chemical resistance
Flexible Cable with Silicone Jacket: Silicone outer jacketed cable with Kevlar® fillers and metal braid for strength. Silicone offers good abrasion and chemical resistance
Flexible Cable with Woven Stainless Steel Overbraid: Kapton® insulation on primaries and outer jacket. Cable protected by stainless steel overbraid. Offers outstanding abrasion and cut resistanceand good chemical resistance
Flexible Cable with Fiberglass Jacket: Woven fiberglass insulation with a resin coating on primaries and outer jacket. Excellent for high temperature applications. Not recommend for abrasive, high flex or foodservice applications