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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 resistance and 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
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10830 Cooper-Atkins Replacement Donut Wires for 50008-K Donut Probe (2 Pack) 10830 Cooper Replacement Donut Wires for 50008-K Donut Probe (2 Pack)

10830 Cooper-Atkins Replacement Donut Wires for 50008-K Donut Probe (2 Pack)

Price $24.50
39138-K Cooper-Atkins Air Probe Bare Tip w/36" Cable Type K Thermocouple 39138-K Cooper Air Probe Bare Tip w/36" Cable Type K Thermocouple

Air Probe Bare Tip w/36" Cable Type K Thermocouple: Bare wire probe that is ideal for air temperatures. Can be used in liquids, but not recommended for food products. Available in Type J, K, and T.

Price $32.43
4005MK Cooper-Atkins Pipe Clamp Surface Probe Type K Thermocouple 4005MK Cooper Pipe Clamp Surface Probe Type K Thermocouple

Pipe Clamp Surface Probe Type K Thermocouple: Used for measuring pipe surface temperatures. Can be used on pipes with diameters of .25" to 1.375".

Price $105.28
50121-K Cooper-Atkins Racing Tire Probe .188" depth Type K Thermocouple 50121-K Cooper Racing Tire Probe .188" depth Type K Thermocouple

Racing Tire Probe .188" depth Type K Thermocouple: Delicate and fast response tip designed to penetrate soft rubber. Available in Type J, K, or T.

Price $80.67
50306-K Cooper-Atkins Air/Oven Probe w/Clip 600°F Type K Thermocouple 50306-K Cooper Air/Oven Probe w/Clip 600°F Type K Thermocouple

Air/Oven Probe w/Clip 600°F Type K Thermocouple: Air probe that is versatile for either oven or freezer montoring. Probe features a SS shield that protects sensor from touching the inside wall of an oven that could convey a false air temperature. Clip for easy mounting and durable cable that will withstand most door closures. Available in Type K only.

Price $75.79
50319-K Cooper-Atkins Ceramic Tip Surface Probe 90° Right Angle Shaft Type K Thermocouple 50319-K Cooper Ceramic Tip Surface Probe 90° Right Angle Shaft Type K Thermocouple

Ceramic Tip Surface Probe 90° Right Angle Shaft Type K Thermocouple: Provides fast readings on any flat or uneven surface. High temperature capability allows for use on hotter surfaces such as grills, molds, dies, and barrels. Due to the thermocouple sensor being exposed, the probe should only be used on a clean surface with possibly a dab of oil or grease to aid in heat transfer. Durable Phenolic handle. Available in Type J, K, and T.

Price $110.86
50334-K Cooper-Atkins DuraNeedle Probe Vitron® Cable Type K Thermocouple 50334-K Cooper DuraNeedle Probe Vitron® Cable Type K Thermocouple

DuraNeedle Probe Vitron® Cable Type K Thermocouple: Probe has a 4" DuraNeedle with a welded-tip design that produces a fast response. Cable is a patented design that is reinforced with Kevlar® and a metal braid and has a fluoroelastmer outer jacket. Available in Type K only.

Price $88.26
ATA1 Fieldpiece K-Type Thermocouple with Alligator Clip ATA1 Fieldpiece T/C-Bead with Clip

ATA1 Fieldpiece K-Type Thermocouple with Alligator Clip - The ATA1, K-type thermocouple can clip to HVACR equipment for convenient placement and hands free testing. Clip to condenser fins for accurate outdoor dry bulb measurement – great for finding target superheat. Clip to evaporator filters for indoor dry bulb – great for finding target evaporator exit temperature. Clip to supply vents for dry bulb supply temperature. The ATA1 can be used with any of our meters that measure temperature and any thermometer accepting a K-type thermocouple. HVACR technicians find the ATA1 extremely helpful when data logging or anytime an extra hand is needed. The wrap-tab allows the thermocouple wire to conveniently store on the plug. Just wrap the excess wire around the wrap-tab. No more tangled messes in your tool bag.

Price $23.65
ATAF1 Fieldpiece High Temperature K-Type Thermocouple with Alligator Clip ATAF1 Fieldpiece T/C-HiTemp with Clip

ATAF1 Fieldpiece High Temperature K-Type Thermocouple with Alligator Clip - The ATAF1, K-type thermocouple clips to HVAC/R equipment for convenient placement and hands free testing. Fiberglass insulation withstands high temperatures up to 900°F. Clip it to residential and commercial ovens, broilers, boilers or any other high temperature application.

Price $43.06
ATB1 Fieldpiece K-Type Bead Thermocouple ATB1 Fieldpiece T/C-Bead

ATB1 Fieldpiece K-Type Bead Thermocouple - The ATB1, K-type bead thermocouple is used to take temperatures of air, surfaces, or liquids up to 400°F. Using the included Velcro strap allows for easy pipe temperature measurements, though not as accurately as the ATC1 Pipe Clamp Thermocouple. Use the ATB1 for outdoor dry bulb temperatures when finding target superheat. The ATB1 can be used with any of our meters that measure temperature and any thermometer accepting a K-type thermocouple.

Price $17.74
ATC1 Fieldpiece Pipe-Clamp Thermocouple 3/8” to 1 3/8” for Air Conditioning ATC1 Fieldpiece Pipe-Clamp Thermocouple 3/8” to 1 3/8” for Air Conditioning

ATC1 Fieldpiece Pipe-Clamp Thermocouple 3/8” to 1 3/8” for Air Conditioning - The ATC1, K-type, pipe clamp thermocouple is used to take temperatures of pipes or any other cylindrical surface within its 3/8” to 1 3/8” jaw range. Using a pipe clamp thermocouple greatly facilitates taking superheat or subcooling measurements. Use the ATC1 for most A/C units. The ATC1 can be used with any of our meters that measure temperature and any thermometer accepting a K-type thermocouple.

Discontinued - see FPITC24
ATC1R Fieldpiece Pipe-Clamp Thermocouple 1/8” to 3/4” for Refrigeration ATC1R Fieldpiece T/C-Clamp (1/8 - 3/4")

ATC1R Fieldpiece Pipe-Clamp Thermocouple 1/8” to 3/4” for Refrigeration - The ATC1R, K-type, pipe clamp thermocouple is used to take temperatures of pipes or any other cylindrical surface within its 1/8” to 3/4” jaw range. Using a pipe clamp thermocouple greatly facilitates taking superheat or subcooling measurements. Use the ATC1R for most refrigeration units. The ATC1R can be used with any of our meters that measure temperature and any thermometer accepting a K-type thermocouple.

Price $70.94
ATC2 Fieldpiece Large Pipe-Clamp Thermocouple 3/8” to 2 1/4” for Air Conditioning ATC2 Fieldpiece Large Pipe-Clamp Thermocouple 3/8” to 2 1/4” for Air Conditioning

ATC2 Fieldpiece Large Pipe-Clamp Thermocouple 3/8” to 2 1/4” for Air Conditioning - The ATC2, K-type, pipe clamp thermocouple is used to take temperatures of medium to large pipes or any other cylindrical surface within its 3/8” to 2 1/4” jaw range. Using a pipe clamp thermocouple greatly facilitates taking superheat or subcooling measurements. Use the ATC2 for most A/C units. The ATC2 can be used with any of our meters that measure temperature and any thermometer accepting a K-type thermocouple.

Discontinued - see FPITC48
ATEXT10 Fieldpiece 10 Foot Extension Cable (K-Type Thermocouple) ATEXT10 Fieldpiece T/C-10' Extension

ATEXT10 Fieldpiece 10 Foot Extension Cable (K-Type Thermocouple) - The ATEXT10 is a K-type thermocouple extension cable designed to give you that extra reach you need when measuring temperatures. It's 10' in length and has a female k-type port on one end and the male plug on the other. It's great for use with rigid thermocouples.

Price $54.89
ATWB1 Fieldpiece K-Type Thermocouple Wet Bulb (sock) with Alligator Clip ATWB1 Fieldpiece T/C-Wet Bulb with Clip

ATWB1 Fieldpiece K-Type Thermocouple Wet Bulb (sock) with Alligator Clip - The ATWB1, K-type wet bulb thermocouple can clip to HVAC/R equipment for convenient placement and hands free testing. Wet the durable sock and clip to evaporator filters for indoor wet bulb – great for finding target evaporator exit temperature. Clip to return vents for indoor wet bulb temperature – great for target superheat calculations. The ATWB1 can be used with any of our meters that measure temperature and any thermometer accepting a K-type thermocouple. HVAC/R technicians find the ATWB1 extremely helpful when data logging or anytime an extra hand is needed.

Price $21.11
FK21L TPI Penetration Probe FK21L TPI Penetration Probe

FK21L TPI Penetration Probe

Price $69.40
FK22L TPI Oven Food Probe FK22L TPI Oven Food Probe

FK22L TPI Oven Food Probe

Price $82.40
FK23L TPI Immersion / Penetration Probe No Handle Or Lead FK23L TPI Immersion / Penetration Probe No Handle Or Lead

FK23L TPI Immersion / Penetration Probe No Handle Or Lead

Price $43.35
FK25L TPI Flat Sensor Between Pack Probe FK25L TPI Flat Sensor Between Pack Probe

FK25L TPI Flat Sensor Between Pack Probe

Price $34.70