Ring Thermocouples | McMaster-Carr

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Mount Type

Bolt On

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Thermocouple Type

Bolt Hole Diameter

3/16"

1/4"

3/8"

Thermocouple Sensor Connection

Flat-Pin Mini Thermocouple Connector

Round-Pin Thermocouple Connector

Wire Leads

Electrical Connection

Flat-Pin Mini Thermocouple Connector

Round-Pin Thermocouple Connector

For Use With

Thermocouple Connection Heads

Material

Maximum Temperature

Cable Length

Cable Material

Accuracy @ Temperature

±0.75% Above 240° F

±0.75% Above 533° F

±1.8° F Between 32° F to 200° F

±1.8° F Between 32° F to 240° F

±4° F Between 32° F to 200° F

±4° F Between 32° F to 533° F

Not Rated Below 32° F

Maximum Cable Temperature

400° F

900° F

For Thermocouple Wire Type

Sensor Type

Fasteners Included

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

RoHS

REACH

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Shape

Minimum Temperature

Number of Circuits

Probe Width

Pin Length

Response Time

60 Products

Bolt-On Thermocouple Probes for Surfaces

Take temperature readings in high-vibration environments. These probes bolt onto motors, machines, and other equipment, so they won’t shake loose. Pick the thermocouple type that best covers the temperature range you expect your surface to be. You should also make sure the thermocouple type you choose is compatible with the device you plan to connect it to. They’re often used with temperature controllers, thermometers, and other temperature-reading devices.

These thermocouples are manufactured to conform to ASTM E230 for accuracy. Accuracy is how far off the reported value is from the actual temperature.

Probes with Cable


With Wire Leads	With Connector	Flat-Pin Mini Connector	Round-Pin Connector

Wire Leads—Probes with wire leads offer more flexibility than probes with connectors already attached because you can either wire them to a terminal block or add your own connector. For installation, note that the red wire is negative.

		Probe								Cable				Wire Lead
	Bolt Hole Dia.	Lg.	Wd.	Thk.	Response Time, sec.	Max. Temp., ° F	Accuracy @ Temperature	Sensor Type	Washer Material	Style	Lg., ft.	Material	Max. Temp., ° F	Lg.	AWG	Fasteners Included		Each
Type J







				Flat-Pin Mini Thermocouple Connector

				3/16"	5/8"	5/16"	1/16"	2	900	±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N17	000000


				1/4"	5/8"	5/16"	1/16"	2	900	±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N18	00000




						Round-Pin Thermocouple Connector

						3/16"	5/8"	5/16"	1/16"	2	900	±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N24	00000


						1/4"	5/8"	5/16"	1/16"	2	900	±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N25	00000




								Wire Leads

								3/16"	5/8"	5/16"	1/16"	2	900	±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	3648K22	00000


								1/4"	5/8"	5/16"	1/16"	2	900	±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	5796N11	00000
								3/8"	5/8"	5/16"	1/16"	2	900	±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	5796N12	00000


								Type K







												Flat-Pin Mini Thermocouple Connector

												3/16"	5/8"	5/16"	1/16"	2	900	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N19	00000


												1/4"	5/8"	5/16"	1/16"	2	900	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N21	00000




														Round-Pin Thermocouple Connector

														3/16"	5/8"	5/16"	1/16"	2	900	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N26	00000


														1/4"	5/8"	5/16"	1/16"	2	900	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N27	00000




Wire Leads

3/16"	5/8"															5/16"	1/16"	2	900	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	3648K24	00000


1/4"	5/8"															5/16"	1/16"	2	900	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	5796N13	00000
3/8"	5/8"	5/16"														1/16"	2	900	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	5796N14	00000


Type T







				Flat-Pin Mini Thermocouple Connector

				3/16"	5/8"											5/16"	1/16"	2	700	Not Rated Below 32° F ±1.8° F Between 32° F to 240° F ±0.75% Above 240° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N22	00000


				1/4"	5/8"											5/16"	1/16"	2	700	Not Rated Below 32° F ±1.8° F Between 32° F to 240° F ±0.75% Above 240° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N23	00000




																Round-Pin Thermocouple Connector

						3/16"	5/8"									5/16"	1/16"	2	700	Not Rated Below 32° F ±1.8° F Between 32° F to 240° F ±0.75% Above 240° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N28	00000


						1/4"	5/8"									5/16"	1/16"	2	700	Not Rated Below 32° F ±1.8° F Between 32° F to 240° F ±0.75% Above 240° F	Grounded	Nickel	Straight	4	Stainless Steel	900	—	—	No	5796N29	00000




																Wire Leads

																3/16"	5/8"	5/16"	1/16"	2	700	Not Rated Below 32° F ±1.8° F Between 32° F to 240° F ±0.75% Above 240° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	3648K26	00000


								1/4"	5/8"							5/16"	1/16"	2	700	Not Rated Below 32° F ±1.8° F Between 32° F to 240° F ±0.75% Above 240° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	5796N15	00000
								3/8"	5/8"							5/16"	1/16"	2	700	Not Rated Below 32° F ±1.8° F Between 32° F to 240° F ±0.75% Above 240° F	Grounded	Nickel	Straight	4	Stainless Steel	900	2 1/2"	24	No	5796N16	00000

Thermocouple Probes for Pipe, Tube, and Hose

Wrap these probes around pipe, hose, or other tubular shapes to measure surface temperature. Pick the thermocouple type that best covers the temperature range you expect your surface to be. You should also make sure the thermocouple type you choose is compatible with the device you plan to connect it to. They’re often used with temperature controllers, thermometers, and data recorders.

These thermocouples are manufactured to conform to ASTM E230 for accuracy. Accuracy is how far off the reported value is from the actual temperature.

Hose Clamp Mount


	Flat-Pin Mini Connector

Hose-clamp probes require a slotted screwdriver, hex nut driver, or wrench to tighten the screw.

								Cable
	Opening Range	Probe Wd.	Response Time, sec.	Max. Temp., ° F	Accuracy @ Temperature	Probe Material	Sensor Type	Lg., ft.	Material	Max. Temp., ° F	Fasteners Included		Each
Type J Thermocouple







				Flat-Pin Mini Thermocouple Connector Connection

				0.688" to 1.25"	9/16"	25	800	±4° F Between 32° F to 533° F ±0.75% Above 533° F	301 Stainless Steel	Grounded	10	Stainless Steel	900	Yes	37045K511	000000


				0.813" to 1.5"	9/16"	25	800	±4° F Between 32° F to 533° F ±0.75% Above 533° F	301 Stainless Steel	Grounded	10	Stainless Steel	900	Yes	37045K521	00000
				1.313" to 2.25"	9/16"	25	800	±4° F Between 32° F to 533° F ±0.75% Above 533° F	301 Stainless Steel	Grounded	10	Stainless Steel	900	Yes	37045K531	00000


				Type K Thermocouple







								Flat-Pin Mini Thermocouple Connector Connection

								0.688" to 1.25"	9/16"	25	800	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	301 Stainless Steel	Grounded	10	Stainless Steel	900	Yes	37045K512	00000


								0.813" to 1.5"	9/16"	25	800	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	301 Stainless Steel	Grounded	10	Stainless Steel	900	Yes	37045K522	00000
								1.313" to 2.25"	9/16"	25	800	Not Rated Below 32° F ±4° F Between 32° F to 533° F ±0.75% Above 533° F	301 Stainless Steel	Grounded	10	Stainless Steel	900	Yes	37045K532	00000

Hook and Loop Mount


	Flat-Pin Mini Connector	Round-Pin Connector

Hook and loop probes can be installed without tools, so they’re faster to attach and remove than hose-clamp probes. They adjust to fit around diameters up to 4''.

						Cable				Straps
	For Max. OD	Response Time, sec.	Max. Temp., ° F	Accuracy @ Temperature	Sensor Type	Lg., ft.	Material	Max. Temp., ° F	AWG	No. of	Wd.	Lg.		Each
Type J Thermocouple







				Flat-Pin Mini Thermocouple Connector Connection

				4"	1.2	200	±4° F Between 32° F to 200° F	Exposed	9	FEP	400	24	2	1 1/8"	8"	5802N11	000000




						Round-Pin Thermocouple Connector Connection

						4"	1.2	200	±4° F Between 32° F to 200° F	Exposed	9	FEP	400	24	2	1 1/8"	8"	5802N14	00000


						Type K Thermocouple







										Flat-Pin Mini Thermocouple Connector Connection

										4"	1.2	200	Not Rated Below 32° F ±4° F Between 32° F to 200° F	Exposed	9	FEP	400	24	2	1 1/8"	8"	5802N12	00000




												Round-Pin Thermocouple Connector Connection

												4"	1.2	200	Not Rated Below 32° F ±4° F Between 32° F to 200° F	Exposed	9	FEP	400	24	2	1 1/8"	8"	5802N15	00000


												Type T Thermocouple







																Flat-Pin Mini Thermocouple Connector Connection

																4"	1.2	200	Not Rated Below 32° F ±1.8° F Between 32° F to 200° F	Exposed	9	FEP	400	24	2	1 1/8"	8"	5802N13	00000




																		Round-Pin Thermocouple Connector Connection

																		4"	1.2	200	Not Rated Below 32° F ±1.8° F Between 32° F to 200° F	Exposed	9	FEP	400	24	2	1 1/8"	8"	5802N16	00000

Terminal Blocks for RTD and Thermocouple Connection Heads


Oblong	Round

These terminal blocks fit inside connection heads for thermocouples and RTD. Make sure the block has enough circuits for your probe, and use a wire that matches your probe type. You can insert stripped wire directly or attach a terminal to prevent damage from the fastener.

												Mounting Slots
	No. of Circuits	For Max. Wire Ga.	Wire Connection	Dia.	Ht.	Wd.	Dp.	For Thermocouple Wire Type	For RTD Probe Resistance, ohm	Max. Temp., ° F	Material	Ht.	Wd.	No. of		Each
Oblong



		2	14	Screw Terminal	—	1 3/8"	2"	1"	J, JX, K, KK, KX, T, TX	100; 1,000	1,000	Ceramic	3/16"	9/16"	2	38705K82	000000


		3	14	Screw Terminal	—	1 3/8"	2"	1"	J, JX, K, KK, KX, T, TX	100; 1,000	1,000	Ceramic	3/16"	9/16"	2	38705K83	00000
		4	14	Screw Terminal	—	1 3/8"	2"	1"	J, JX, K, KK, KX, T, TX	100; 1,000	1,000	Ceramic	3/16"	9/16"	2	5927N11	00000
		6	14	Screw Terminal	—	1 3/8"	2"	1"	J, JX, K, KK, KX, T, TX	100; 1,000	1,000	Ceramic	3/16"	9/16"	2	5927N12	00000


		Round



				2	14	Screw Terminal	1 15/16"	—	—	3/4"	J, JX, K, KK, KX, T, TX	100; 1,000	1,000	Ceramic	3/16"	5/16"	2	5927N13	00000


				3	14	Screw Terminal	1 15/16"	—	—	3/4"	J, JX, K, KK, KX, T, TX	100; 1,000	1,000	Ceramic	3/16"	5/16"	2	5927N14	00000
				4	14	Screw Terminal	1 15/16"	—	—	3/4"	J, JX, K, KK, KX, T, TX	100; 1,000	1,000	Ceramic	3/16"	5/16"	2	5927N15	00000
				6	14	Screw Terminal	1 15/16"	—	—	3/4"	J, JX, K, KK, KX, T, TX	100; 1,000	1,000	Ceramic	3/16"	5/16"	2	5927N16	00000

Terminal Blocks for Thermocouples

Unlike other terminal blocks, these blocks connect to thermocouple wire without distorting or destroying the signal. The metal in each terminal matches the metal of a specific thermocouple wire type. The ends of the blocks are labeled positive or negative so you know which end of the wire to attach.

Also known as a barrier strip, this type of terminal block has dividers to separate live wires and keep your setup tidy. Mount the blocks directly onto control panels, enclosures, and equipment. The screw-clamp terminals flatten your wire so it stays put when vibrated or pulled.

												Mounting Holes
	No. of Circuits	No. of Terminals per Circuit	For Wire Ga.	Wire Connection	Terminal Size	Terminal Ctr.-to-Ctr.	Lg.	Wd.	Ht.	Max. Temp., ° F	Color	Dia.	No. of		Each
For J Thermocouple Wire Type







				250V AC—20 amp per Circuit

				2	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	2 1/2"	1 5/16"	1/2"	300	Black	0.17"	4	7882N11	000000


				4	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	4 1/4"	1 5/16"	1/2"	300	Black	0.17"	4	7882N14	00000
				6	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	6"	1 5/16"	1/2"	300	Black	0.17"	4	7882N17	00000
				8	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	7 3/4"	1 5/16"	1/2"	300	Black	0.17"	4	7882N21	00000
				10	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	9 1/2"	1 5/16"	1/2"	300	Black	0.17"	4	7882N24	00000


				For K Thermocouple Wire Type







								250V AC—20 amp per Circuit

								2	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	2 1/2"	1 1/8"	1/2"	300	Black	0.17"	4	7882N12	00000


								4	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	4 1/4"	1 1/8"	1/2"	300	Black	0.17"	4	7882N15	00000
								6	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	6"	1 1/8"	1/2"	300	Black	0.17"	4	7882N18	00000
								8	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	7 3/4"	1 1/8"	1/2"	300	Black	0.17"	4	7882N22	00000
								10	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	9 1/2"	1 1/8"	1/2"	300	Black	0.17"	4	7882N25	00000


								For T Thermocouple Wire Type







												250V AC—20 amp per Circuit

												2	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	2 1/2"	1 5/16"	1/2"	300	Black	0.17"	4	7882N13	00000


												4	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	4 1/4"	1 5/16"	1/2"	300	Black	0.17"	4	7882N16	00000
												6	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	6"	1 5/16"	1/2"	300	Black	0.17"	4	7882N19	00000
												8	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	7 3/4"	1 5/16"	1/2"	300	Black	0.17"	4	7882N23	00000
												10	4	16 to 14	Screw-Clamp Terminal	No. 6	7/16"	9 1/2"	1 5/16"	1/2"	300	Black	0.17"	4	7882N26	00000

Soldering Iron Tip Thermometers


Sensor	LCD Display

Touch the tip of your soldering iron for a fast, accurate temperature reading. Within about five seconds, you'll know how hot the iron is, so you can decide whether it's ready for your particular soldering material and application.

A metal alloy coating on the sensor's contact point resists corrosion and oxidation, so your readings will stay accurate throughout the life of the thermometer. And a sensor burnout alarm alerts you when the sensor is worn out and needs to be replaced.

Press the auto hold button to smooth out small, 1° to 2° fluctuations in temperature, which can be distracting when trying to read the display. Once the thermometer has a stable reading, it displays the average temperature instead of the exact temperature.

The max hold button displays the highest measured temperature, so you know your soldering iron hasn't become too hot for the job. It's especially useful when you're soldering sensitive components, such as printed writing boards (PWBs).

Thermometers with Calibration Certificate Traceable to NIST—Some thermometers come with a calibration certificate traceable to NIST, which states that the thermometer has passed a test for accuracy.

Certification—These thermometers have three standards markings: MET, CE, and EMC. MET means they meet U.S. and Canadian performance and safety standards. CE is the marking for European performance and safety standards. And EMC markings indicate the thermometers meet European standards for electromagnetic compatibility.

	Resolution	Accuracy	Ht.	Wd.	Dp.	Housing Material	Certification	Digit Ht.	Batteries Included	Includes		Each
Thermometers



	32° F to 932° F/0° C to 500° C	1° F/1° C	±6° F/±3° C	5 1/2"	2 11/16"	1 3/4"	Plastic	MET Marked, CE Marked, EMC Marked	7/8"	Yes	One Replacement Sensor	3524N101	0000000


	Thermometers with Calibration Certificate Traceable to NIST



			32° F to 932° F/0° C to 500° C	1° F/1° C	±6° F/±3° C	5 1/2"	2 11/16"	1 3/4"	Plastic	MET Marked, CE Marked, EMC Marked	7/8"	Yes	One Replacement Sensor	3524N102	000000

Replacements for Thermometers

		Each
Replacement Ring Plates	3524N104	00000
Replacement Sensors	3524N105	00000