SPDT Thermostats | McMaster-Carr

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66 Products

Line-Voltage Thermostats

For Air

Conditioners

and Heaters

Regulate line-voltage HVAC systems.

For Heaters—Thermostats for heaters mount to a surface-mount outlet box.

Cannot Be Sold To—Energy efficiency requirements restrict sales to the listed jurisdictions/areas.

						Overall
	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Electrical Connection Type	Ht.	Wd.	Dp.	For Use Outdoors	Mounting Fasteners Included	Display Type	Certification	Cannot Be Sold To		Each
For Air Conditioners and Heaters







				Dial Control

				24 to 277	22	40 to 90	SPDT	Hardwire	4 3/4"	3"	1 3/8"	No	Yes	Analog	UL Listed	Colorado	0000000	0000000

Enclosure Thermostats for Multiple Devices

Keep electronics in your enclosure from getting too hot or cold with these thermostats that control two devices at once. Clip them to a DIN rail to install.

For Heating and Cooling Thermostats with One Actuation Point

Adjustable Thermostat

with One Actuation Point

Heating and cooling thermostats control heaters and fans or air conditioners.

Thermostats with one actuation point, also known as changeover thermostats, switch between heating and cooling so one device is always running. When the temperature in your enclosure gets hotter than the temperature you set, the thermostat will turn on your fan or air conditioner. It goes back to heating once the temperature is reduced by the temperature difference. So for a thermostat with a temperature difference of 9° F, setting it at 60° F means it will heat the enclosure until it reaches 60° F, switch to cooling until it reaches 51° F, and then switch back to heating.

Adjustable Actuation Point—Adjustable thermostats allow you to set custom temperatures.

IP20 Enclosure Rating—All thermostats meet IP20, which means they’re designed so fingers can’t fit inside and get shocked.

UL 94 V-0—They also meet UL 94 V-0, so they self-extinguish within 10 seconds if they catch fire and won’t spread the fire by dripping.

Certification—Thermostats that are CE marked or VDE certified meet European safety standards. UL Recognized Component and C-UL Recognized Component thermostats also meet American and Canadian safety standards.

	Temp., ° F				Overall
	Setting	Difference	Tolerance	Voltage	Ht.	Wd.	Dp.	Enclosure Rating	Flammability Rating	Certification		Each
Adjustable Actuation Point



		32 to 140	5.4	-1.8 to 1.8	24V DC	2 5/8"	2"	1 13/16"	IP20	UL 94 V-0	CE Marked	0000000	000000


		40 to 140	7	-1.8 to 1.8	120V AC	2 9/16"	1 5/8"	1 1/2"	IP20	UL 94 V-0	CE Marked, CSA Certified, CSA-US Certified	0000000	00000
		40 to 140	9	-5.4 to 3.6	120V AC	2 5/8"	2"	1 1/2"	IP20	UL 94 V-0	C-UL Recognized Component, CE Marked, UL Recognized Component	0000000	00000
		40 to 140	9	-5.4 to 3.6	240V AC	2 5/8"	2"	1 1/2"	IP20	UL 94 V-0	C-UL Recognized Component, CE Marked, UL Recognized Component	0000000	00000

Remote-Sensing Line-Voltage Thermostats


Style A	Style B

Place sensor in enclosures or different rooms than the rest of the thermostat to control temperature from outside the space. Thermostats work with line-voltage HVAC systems.

							Overall
	Style	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Electrical Connection Type	Ht.	Wd.	Dp.	Sensor Cord Lg., ft.	For Use Outdoors	Mounting Fasteners Included	Mounting Hole Dia.	Display Type	Certification		Each
For Air Conditioners and Heaters







				Dial Control

				A	120 to 277	22	-30 to 100	SPDT	Hardwire	5"	2 1/4"	1 5/8"	8	No	No	1/8"	Analog	UL Listed	0000000	0000000


				B	120 to 277	22	40 to 110	SPDT	Hardwire	5 1/2"	2 1/8"	2 5/8"	2	No	No	1/8"	Analog	UL Listed	0000000	000000

DIN-Rail Mount Remote-Sensing Line-Voltage Thermostats


	Replacement Sensor and Cable

Place sensor in enclosures or different rooms than the rest of the thermostat to control temperature from outside the space. Thermostat works with line-voltage HVAC systems.

						Overall
	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Electrical Connection Type	Ht.	Wd.	Dp.	Sensor Cord Lg., ft.	For Use Outdoors	Mounting Fasteners Included	Mounting Hole Dia.	Display Type	Certification		Each
For Air Conditioners and Heaters







				Keypad Control

				120 to 240	15	-30 to 212	SPDT	Hardwire	5"	2 3/8"	2 3/8"	6	No	No	1/4"	Digital	UL Listed	0000000	0000000

Temperature and Humidity Sensors

		Each
Replacement Sensor and Cable	00000000	000000

Remote-Sensing Line-Voltage Thermostats with Thermowell

Commonly used with line-voltage hydronic heaters, this thermostat senses the temperature of liquids at a distance using the remote sensor. The thermowell protects the sensor.

Cannot Be Sold To—Energy efficiency requirements restrict sales to the listed jurisdictions/areas.

						Overall					Thermowell
	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Electrical Connection Type	Ht.	Wd.	Dp.	Sensor Cord Lg., ft.	For Use Outdoors	Thread Type	Pipe Size	Mounting Fasteners Included	Mounting Hole Dia.	Display Type	Certification	Cannot Be Sold To		Each
For Air Conditioners and Heaters







				Dial Control

				120 to 240	10	100 to 240	SPDT	Hardwire	4 1/2"	2 1/4"	1 7/8"	8	No	NPT	1/2	No	1/4"	Analog	UL Listed	Colorado	000000	0000000

Multispeed Line-Voltage Thermostats

Control one- and two-speed line-voltage HVAC systems. Set the thermostat to activate the device’s second speed when the temperature surpasses the setting for the first speed by 3.6° F to 9° F.

Cannot Be Sold To—Energy efficiency requirements restrict sales to the listed jurisdictions/areas.

						Overall
	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Electrical Connection Type	Ht.	Wd.	Dp.	Temp. Differential, ° F	For Use Outdoors	Mounting Fasteners Included	Display Type	Enclosure Rating	Certification	Cannot Be Sold To		Each
For Air Conditioners and Heaters







				Dial Control

				24 to 250	15	32 to 140	SPDT	Hardwire	6"	2 3/4"	3 3/8"	3.6 to 9	Yes	Yes	Analog	IP65, NEMA 4	CE Marked	Colorado	0000000	0000000

Line-Voltage Thermostats with Thermowell

Commonly used with line-voltage hydronic heaters, this thermostat senses the temperature of liquids. The thermowell protects the sensor.

Cannot Be Sold To—Energy efficiency requirements restrict sales to the listed jurisdictions/areas.

						Overall				Thermowell
	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Electrical Connection Type	Ht.	Wd.	Dp.	For Use Outdoors	Thread Type	Pipe Size	Mounting Fasteners Included	Display Type	Certification	Cannot Be Sold To		Each
For Air Conditioners and Heaters







				Dial Control

				120 to 240	10	100 to 240	SPDT	Hardwire	4 1/2"	2 1/4"	1 7/8"	No	NPT	1/2	No	Analog	UL Listed	Colorado	000000	0000000

Wall-Mount Temperature Switches

Turn heating equipment on or off at a specified temperature. Switches have a probe on a cable for remote temperature readings. Set the actuation point with the adjustment dial.

Switches

SPDT (Single Pole,

Double Throw) Switch

with Enclosed Housing

1 Circuit Controlled—Switches that control one circuit are single pole, double throw (SPDT). They can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

			Probe
	Temp. Range, ° F	Max. Switching Current @ Voltage (Electrical Phase)	Dia.	Lg.	Material	Ht.	Wd.	Dp.	Fasteners Included	Enclosure Rating		Each
SPDT—1 Circuit Controlled







				Enclosed Housing

				-130 to 120	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	4 1/2"	Copper	3 1/4"	3 1/2"	2 13/16"	No	NEMA 1	00000000	0000000


				0 to 150	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	6 7/8"	Copper	3 1/4"	3 1/2"	2 13/16"	No	NEMA 1	00000000	000000
				50 to 300	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	4 1/2"	Copper	3 1/4"	3 1/2"	2 13/16"	No	NEMA 1	00000000	000000
				150 to 650	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	3 5/8"	Copper	3 1/4"	3 1/2"	2 13/16"	No	NEMA 1	00000000	000000

Switch Mounts

		Each
Packing Seals and Fittings	0000000	000000

Remote-Sensing Room-Monitoring Adjustable Thermostats

If ambient air temperature rises above or falls below an actuation point, this thermostat flashes the current temperature reading on the display and shows a “high” or “low” message. To actuate remote-mount buzzers (not included), it has two SPDT (single pole, double throw) relays that can each be set to turn one circuit from “off” to “on” (normally open) or from “on” to “off” (normally closed). Switch has a built-in ambient temperature sensor.

12V DC—12-volt DC power supply (not included) is required.

								Overall
Temperature Range	Accuracy	Actuation Points	Voltage, V DC	Switch Designation	Max. Housing Temp., ° F	Housing Material	Electrical Connection Type	Ht.	Wd.	Dp.	Display Type	Digit Ht.	Resolution		Each



	32° F to 122° F/0° C to 50° C	±1° C/±2° F	4	12	SPDT	120	Plastic	Hardwire	4 3/4"	6"	1 1/4"	LCD	1"	1	0000000	0000000

Temperature and Humidity Sensors

Remote temperature sensors let you monitor temperature up to 1,000 feet from the switch. Remote sensors can be used simultaneously with the switch’s built-in ambient temperature sensor for monitoring two areas.

			Probe
Temperature Range	Accuracy	Cable Lg., ft.	Lg.	Dia.	Material		Each
-58° F to 158° F/-50° C to 70° C	±1° F/±1° C	2	3 21/32"	1/4"	Stainless Steel	0000000	000000
32° F to 299° F/0° C to 150° C	±1° F/±1° C	2	3 21/32"	1/4"	Stainless Steel	0000000	00000

Remote-Sensing Hazardous Location Line-Voltage Thermostats

Place sensor in enclosures or different rooms than the rest of the thermostat to control temperature from outside the space. Use to regulate line-voltage HVAC systems where flammable gases, vapors, and dust are present.

Hazardous Location Rating—Thermostats are rated Class I, Divisions 1 and 2, Group D; and Class II, Divisions 1 and 2, Groups E, F, and G.

						Overall
	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Electrical Connection Type	Ht.	Wd.	Dp.	Sensor Cord Lg., ft.	For Use Outdoors	Mounting Fasteners Included	Mounting Hole Dia.	Display Type	Hazardous Location Rating	Enclosure Rating	Certification		Each
For Air Conditioners and Heaters







				Dial Control

				120 to 277	22	20 to 80	SPDT	Hardwire	5 7/8"	3"	3 1/4"	6	No	No	3/8"	Analog	NEC Class I Divisions 1, 2 Group D; NEC Class II Divisions 1, 2 Groups E, F, G	NEMA 7, NEMA 9	CSA Certified, UL Listed	0000000	0000000

Wet-Location Line-Voltage Thermostats


Hardwire	Plug

Regulate temperatures in wet locations for HVAC systems that use direct electrical power, such as air conditioners and heaters. These thermostats have a sealed housing to protect against dripping, splashing, and falling liquids.

Plug In—Thermostats with a plug are easy to connect. Plug in the thermostat and then plug your heater into the thermostat.

Cannot Be Sold To—Energy efficiency requirements restrict sales to the listed jurisdictions/areas.

							Electrical		Overall
	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Cord Lg., ft.	Electrical Connection Type	Connection	No. of Blades	Ht.	Wd.	Dp.	For Use Outdoors	Mounting Fasteners Included	Mounting Hole Dia.	Display Type	Certification	UL File No.	Cannot Be Sold To		Each
For Air Conditioners and Heaters







				Dial Control

				120 to 277	22	30 to 110	SPDT	—	Hardwire	—	—	7 3/4"	3"	2 5/8"	Yes	No	7/32"	Analog	C-UL Listed, UL Listed	E313212	Colorado	0000000	0000000


				For Heaters







								Dial Control

								125	10	30 to 110	SPDT	7	Plug In	Straight Blade	3	7 3/4"	3"	2 5/8"	Yes	No	7/32"	Analog	C-UL Listed, UL Listed	E313212	Colorado	0000000	000000

Surface-Mount Temperature Switches

Often used to control heat cable output, these switches maintain your surface’s temperature by turning equipment on or off when they reach a set temperature. They actuate when the temperature rises to the setpoint and reset when the temperature falls below the reset point. Since they're SPDT (single pole, double throw) switches, they control one circuit and can either be wired to turn one device from on to off (normally closed) or from off to on (normally open). Wire them normally closed to power a heater—when the temperature rises to the setpoint, the heater will turn off until the temperature falls below the reset point. Or wire them normally open to turn on alarms or other devices when the temperature rises above the setpoint. Their setpoint isn’t adjustable, so they’re easy to set up and there’s no risk of unintentional changes.

CSA-US Certified—CSA-US certified switches meet American safety standards.

CSA Certified—CSA certified switches meet Canadian safety standards.

							Mounting Holes			SPDT
	Actuation Point, ° F	Actuation Tolerance, ° F	Approx. Difference Between Set Point and Reset Point, ° F	Max. Switching Current @ Voltage (Electrical Phase)	Ht.	Wd.	No. of	Dia.	Certification		Each
Fixed Rising Actuation Point



		47	-6 to 6	10	15 amp @ 240V AC (Single)	1 1/8"	2"	2	3/16"	CSA-US Certified, CSA Certified	0000000	0000000


		60	-6 to 6	15	15 amp @ 240V AC (Single)	1 1/8"	2"	2	3/16"	CSA-US Certified, CSA Certified	0000000	000000
		75	-6 to 6	15	15 amp @ 240V AC (Single)	1 1/8"	2"	2	3/16"	CSA-US Certified, CSA Certified	0000000	000000
		105	-6 to 6	15	15 amp @ 240V AC (Single)	1 1/8"	2"	2	3/16"	CSA-US Certified, CSA Certified	0000000	000000
		200	-6 to 6	15	15 amp @ 240V AC (Single)	1 1/8"	2"	2	3/16"	CSA-US Certified, CSA Certified	0000000	000000

Hazardous Location Line-Voltage Thermostats

Use to regulate line-voltage HVAC systems where flammable gases, vapors, and dust are present.

Hazardous Location Rating—Thermostats are rated Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G.

Cannot Be Sold To—Energy efficiency requirements restrict sales to the listed jurisdictions/areas.

						Overall
	Voltage, V AC	Current, amp	Temp. Setting, ° F	Switch Designation	Electrical Connection Type	Ht.	Wd.	Dp.	For Use Outdoors	Mounting Fasteners Included	Mounting Hole Dia.	Display Type	Hazardous Location Rating	Enclosure Rating	Certification	Cannot Be Sold To		Each
For Air Conditioners and Heaters







				Dial Control

				24 to 277	22	50 to 90	SPDT	Hardwire	5 3/4"	6 3/8"	5 5/8"	No	No	1/4"	Analog	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	NEMA 7	CSA Certified, UL Listed	Colorado	0000000	0000000

Threaded Temperature Switches

Install the threaded probe directly into tanks, pipelines, and other process components to turn heating equipment on or off at a specified temperature. These switches have an adjustment dial to set the actuation point. All are SPDT (single pole, double throw). They can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

							Probe								SPDT
	Temp. Range, ° F	Temp. Accuracy	No. of Actuation Points	Actuation Tolerance	No. of Circuits Controlled	Max. Switching Current @ Voltage (Electrical Phase)	Dia.	Lg.	Max. Pressure, psi	Ht.	Wd.	Dp.	Enclosure Rating	Certification		Each
Threaded Brass Probe—3/8 NPT Male







				Adjustable Actuation Point

				0 to 225	±2° F	1	-1% to 1%	1	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	9/16"	2 1/8"	1,897	3 5/16"	3 13/32"	2 13/16"	NEMA 1	UL Listed, C-UL Listed, CE Marked	00000000	0000000


				200 to 425	±4° F	1	-1% to 1%	1	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	9/16"	2 1/8"	1,784	3 5/16"	3 13/32"	2 13/16"	NEMA 1	UL Listed, C-UL Listed, CE Marked	00000000	000000

Washdown Wall-Mount Temperature Switches


With Threaded Copper Probe	With Unthreaded Stainless Steel Probe

To protect these switches from splashing water, corrosive liquid, and dust, the housing meets NEMA 4X for washdown conditions. Switches turn heating equipment on or off at a specified temperature. All have a probe on a cable for remote temperature readings. Set actuation points with the adjustment dial.

SPDT—SPDT (Single pole, double throw) switches can be set to turn circuits from off to on (normally open) or from on to off (normally closed). Switches with one actuation point have one SPDT (single pole, double throw) relay. The relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed). The probe has _1/2 NPT male threads for installation directly into tanks, pipelines, and other process components. It comes with a bushing that adapts the thread size to _3/4 NPT male. Switches with two actuation points have two SPDT (single pole, double throw) relays. Each relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

					Probe
	Temp. Range	Temperature Accuracy	No. of Actuation Points	Max. Switching Current @ Voltage (Electrical Phase)	Dia.	Lg.	Wire Connection	Ht.	Wd.	Dp.	Enclosure Rating	Certification		Each
SPDT—1 Circuit Controlled







				Threaded Copper Probe—1/2 NPT Male

				30° F to 250° F	±3° F	1	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	2 5/8"	Screw Terminal	8 11/16"	4"	2 3/8"	NEMA 4X	UL Listed, C-UL Listed, CE Marked	0000000	0000000


				100° F to 400° F	±4° F	1	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	2 1/8"	Screw Terminal	8 11/16"	4"	2 3/8"	NEMA 4X	UL Listed, C-UL Listed, CE Marked	0000000	000000


				SPDT—2 Circuits Controlled







								Unthreaded Stainless Steel Probe

								30° F to 250° F	±5° F	2	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	2 5/8"	Screw Terminal	6 11/16"	5 5/32"	5 1/2"	NEMA 4X	UL Listed, C-UL Listed, CE Marked, FM Approved	0000000	000000


								100° F to 400° F	±8° F	2	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	2 1/8"	Screw Terminal	6 11/16"	5 5/32"	5 1/2"	NEMA 4X	UL Listed, C-UL Listed, CE Marked, FM Approved	0000000	000000

Switch Mounts

		Each
Packing Seals and Fittings	0000000	000000

Harsh Environment Surface-Mount Temperature Switches

An airtight seal on these switches blocks out dust, dirt and moisture. They maintain your surface’s temperature by turning equipment on or off when they reach a set temperature. These switches actuate when the temperature rises to the setpoint and reset when the temperature falls below the reset point. Since they're SPDT (single pole, double throw) switches, they control one circuit and can either be wired to turn one device from on to off (normally closed) or from off to on (normally open). Wire them normally closed to power a heater—when the temperature rises to the setpoint, the heater will turn off until the temperature falls below the reset point. Or wire them normally open to turn on alarms or other devices when the temperature rises above the setpoint. Their setpoint isn’t adjustable, so they’re easy to set up and there’s no risk of unintentional changes.

CSA-US Certified—CSA-US certified switches meet American safety standards.

CSA Certified—CSA certified switches meet Canadian safety standards.

									Mounting Holes			SPDT
Actuation Point, ° F	No. of Actuation Points	Actuation Tolerance, ° F	No. of Circuits Controlled	Approx. Difference Between Set Point and Reset Point, ° F	Max. Switching Current @ Voltage (Electrical Phase)	Max. Pressure	Ht.	Wd.	No. of	Dia.	Certification		Each







			Fixed Rising Actuation Point

			47	1	-6 to 6	1	10	15 amp @ 240V AC (Single)	Not Rated	2 15/16"	2"	2	11/64"	CSA-US Certified, CSA Certified	00000000	0000000


			60	1	-6 to 6	1	15	15 amp @ 240V AC (Single)	Not Rated	2 15/16"	2"	2	11/64"	CSA-US Certified, CSA Certified	00000000	000000
			75	1	-6 to 6	1	15	15 amp @ 240V AC (Single)	Not Rated	2 15/16"	2"	2	11/64"	CSA-US Certified, CSA Certified	00000000	000000
			105	1	-6 to 6	1	15	15 amp @ 240V AC (Single)	Not Rated	2 15/16"	2"	2	11/64"	CSA-US Certified, CSA Certified	00000000	000000
			200	1	-6 to 6	1	15	15 amp @ 240V AC (Single)	Not Rated	2 15/16"	2"	2	11/64"	CSA-US Certified, CSA Certified	00000000	000000

Washdown Threaded Temperature Switches

Turn heating equipment on or off in washdown environments. To withstand splashing water, corrosive liquid, and dust, these switches have a housing that meets NEMA 4X. The threaded probe installs directly into tanks, pipelines, and other process components. Use the adjustment dial to set actuation points.

2 Actuation Points—Switches with two actuation points have two SPDT (single pole, double throw) relays. Each relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

							Probe								SPDT
	Temp. Range, ° F	Temp. Accuracy	No. of Actuation Points	Actuation Tolerance	No. of Circuits Controlled	Max. Switching Current @ Voltage (Electrical Phase)	Dia.	Lg.	Max. Pressure, psi	Ht.	Wd.	Dp.	Enclosure Rating	Certification		Each
Threaded Brass Probe—1/2 NPT Male







				Adjustable Actuation Point

				0 to 225	±2° F	1	-1% to 1%	1	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	9/16"	1 7/8"	1,897	9 3/8"	4"	2 3/8"	NEMA 4X	UL Listed, C-UL Listed, CE Marked	0000000	0000000


				0 to 225	±5° F	2	-1% to 1%	2	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	9/16"	1 7/8"	1,897	7 3/8"	5 3/32"	5 1/2"	NEMA 4X	UL Listed, C-UL Listed, CE Marked, FM Approved	0000000	000000
				200 to 425	±4° F	1	-1% to 1%	1	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	9/16"	1 7/8"	1,784	9 3/8"	4"	2 3/8"	NEMA 4X	UL Listed, C-UL Listed, CE Marked	0000000	000000

Hazardous Location Wall-Mount Temperature Switches


With Threaded Probe	With Unthreaded Probe

Turn heating equipment on or off in environments with flammable gases, combustible dust, and ignitable fibers, such as chemical plants, refineries, and grain elevators. The switch housing is UL listed for use in Class I, Divisions 1 and 2, Groups B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 hazardous locations. It also meets NEMA 4X for use in washdown environments with splashing water, corrosive liquid, and dust. Switches have a probe on a cable for remote temperature readings. Set actuation points with the adjustment dial.

1 Actuation Point—Switches with one actuation point have one SPDT (single pole, double throw) relay. The relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed). The probe has _1/2 NPT male threads for installation directly into tanks, pipelines, and other process components. It comes with a bushing that adapts the thread size to _3/4 NPT male.

					Probe
	Temp. Range	Temp. Accuracy	No. of Actuation Points	Max. Switching Current @ Voltage (Electrical Phase)	Dia.	Lg.	Ht.	Wd.	Dp.	Enclosure Rating	Hazardous Location Rating	Includes		Each
SPDT—1 Circuit Controlled







				Threaded Stainless Steel Probe—1/2 NPT Male

				30° F to 250° F	±5° F	1	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	2 5/8"	9 5/16"	5 1/8"	5 3/16"	IP66, NEMA 4X, NEMA 7, NEMA 9	ATEX II 2 D Ex Tb IIIC T85° C Db ATEX II 2 G Ex Db IIC T6 Gb IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IECEx Ex D IIC T6 Gb IECEx Ex Tb IIIC T85° C Db NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIB, IIA	1/2 × 3/4 NPT Adapter Bushing	0000000	000000000


				SPDT—2 Circuits Controlled







								Unthreaded Stainless Steel Probe

								30° F to 250° F	±5° F	2	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	3/8"	2 5/8"	9 5/16"	5 1/8"	5 3/16"	IP66, NEMA 4X, NEMA 7, NEMA 9	ATEX II 2 D Ex Tb IIIC T85° C Db ATEX II 2 G Ex Db IIC T6 Gb IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IECEx Ex D IIC T6 Gb IECEx Ex Tb IIIC T85° C Db NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIB, IIA	—	0000000	00000000

Switch Mounts

		Each
Packing Seals and Fittings	0000000	000000

On/Off Temperature Controllers

The simplest temperature controllers—they turn devices fully on or off, with no middle state, at a given temperature. They’re best as alarms and for systems where temperature changes slowly, but they shouldn’t be used when precise temperature control is necessary. All automatically reset as the temperature fluctuates. To read the temperature, they use a highly sensitive thermocouple probe (not included). And their mechanical relay actuates circuits directly. Controllers are SPDT (single pole, double throw) and can turn one circuit from off to on (normally open) or on to off (normally closed). Mount them into cutouts in instrument panels.

All meet American, Canadian, and European safety standards.

Dial Adjustment

Controllers with a dial let you change the temperature actuation point with a turn. They fit into panels with _1/16 DIN cutouts.

					Mechanical Relay				100V AC to 240V AC Input Voltage
	Temperature Control Range	For Thermocouple Probe Type	Total No. of Outputs	Output Type	Switch Designation	Max. Switching Current @ Voltage	Reset Type	Enclosure Rating		Each
For 1/16 DIN Panel Cutout Size–For 1 3/4" Ht. × 1 3/4" Wd. Panel Cutout



		32° F to 1,110° F 0° C to 600° C	K	1	Heating—1 Mechanical Relay	SPDT	3 amp @ 250V AC	Automatic	IP40	0000000	0000000


		32° F to 2,190° F 0° C to 1,200° C	K	1	Heating—1 Mechanical Relay	SPDT	3 amp @ 250V AC	Automatic	IP40	0000000	000000

Accessories for Temperature Controllers

DIN-Rail/Surface-Mount Adapters for 1/16 DIN Controllers

Mounting Fasteners

Not Included

To mount _1/16 DIN controllers to a surface or DIN rail, add DIN-rail/surface-mount adapters.

Mounting
Fasteners Included	Screw Size	No. of Holes		Each
No	No. 6	2	000000000	000000

DIN Cutout Adapters for 1/16 DIN Controllers

Mounting Fasteners

Included

To mount _1/16 DIN controllers to a surface or DIN rail, add DIN-rail/surface-mount adapters. To convert larger cutouts to fit these controllers, use DIN cutout adapters.

	Mounting
For DIN Panel Cutout Size	Fasteners Included	Screw Size	No. of Holes		Each
1/16, 1/4	Yes	No. 8	4	000000000	000000
1/16, 1/8	Yes	No. 8	4	000000000	00000

Keypad Adjustment

Controllers with a keypad let you quickly adjust the temperature actuation point, reset point, and other settings.

IP64 Enclosure Rating—IP64 rated controllers protect against dust and splashing water.

					Mechanical Relay				120V AC Input Voltage		240V AC Input Voltage
	Temperature Control Range	For Thermocouple Probe Type	Total No. of Outputs	Output Type	Switch Designation	Max. Switching Current @ Voltage	Reset Type	Enclosure Rating		Each		Each
For 1 1/8" Ht. × 2 13/16" Wd. Panel Cutout



		32° F to 990° F	J, K, S	1	Heating—1 Mechanical Relay	SPDT	16 amp @ 240V AC	Automatic	IP64	0000000	0000000	0000000	0000000

Hazardous Location Threaded Temperature Switches

Often used in hazardous locations, such as chemical plants, refineries, and grain elevators, these switches have a housing that’s UL listed for environments with flammable gases, combustible dust, and ignitable fibers. It is UL listed for use in Class I, Divisions 1 and 2, Groups B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 hazardous locations. The housing also meets NEMA 4X for use in washdown environments with splashing water, corrosive liquid, and dust. Install the threaded probe directly into tanks, pipelines, and other process components to turn heating equipment on or off at a specified temperature. Set actuation points with the adjustment dial.

							Probe									SPDT
	Temp. Range, ° F	Temp. Accuracy	No. of Actuation Points	Actuation Tolerance	No. of Circuits Controlled	Max. Switching Current @ Voltage (Electrical Phase)	Dia.	Lg.	Max. Pressure, psi	Ht.	Wd.	Dp.	Enclosure Rating	Hazardous Location Rating	Certification		Each
Threaded Brass Probe—1/2 NPT Male







				Adjustable Actuation Point

				0 to 225	±2° F	1	-1% to 1%	1	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	9/16"	1 7/8"	1,897	10"	5 1/8"	5 3/16"	IP66, NEMA 4X, NEMA 7, NEMA 9	ATEX II 2 D Ex Tb IIIC T85° C Db ATEX II 2 G Ex Db IIC T6 Gb IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IECEx Ex D IIC T6 Gb IECEx Ex Tb IIIC T85° C Db NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIB, IIA	UL Listed, C-UL Listed, CE Marked	0000000	0000000


				0 to 225	±2° F	2	-1% to 1%	2	15 amp @ 125V AC (Single) 15 amp @ 250V AC (Single) 15 amp @ 480V AC (Single)	9/16"	1 7/8"	1,784	10"	5 1/8"	5 3/16"	IP66, NEMA 4X, NEMA 7, NEMA 9	ATEX II 2 D Ex Tb IIIC T85° C Db ATEX II 2 G Ex Db IIC T6 Gb IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IECEx Ex D IIC T6 Gb IECEx Ex Tb IIIC T85° C Db NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIB, IIA	UL Listed, C-UL Listed, CE Marked	0000000	00000000

High-Limit Temperature Controllers

To protect equipment and personnel, these controllers shut down your machine when it gets too hot. Reset them manually to turn your machine on again. They're often used as a fail-safe system and for triggering alarms.

Set the actuation point and adjust other settings with the keypad. To read the temperature, these controllers use a highly sensitive thermocouple probe (sold separately). They have one or two mechanical relays that actuate circuits directly. Mount them into instrumentation panels with DIN cutouts.

Controllers with Mechanical Relay Heating Output


For 1/16 DIN Panel Cutout Size	For 1/4 DIN Panel Cutout Size

SPDT—Controllers that are SPDT (single pole, double throw) can turn one circuit from off to on (normally open) or on to off (normally closed).

SPST-NO—Controllers that are SPST-NO (single pole, single throw) can turn one circuit from off to on (normally open).

Remote Reset—Remote-reset controllers are best for hard-to-reach locations. To operate, you’ll need to wire the remote reset input terminals, and the sensor must be below the set temperature.

				Mechanical Relay
	For Thermocouple Probe Type	Total No. of Outputs	Output Type	Switch Designation	Max. Switching Current @ Voltage	For Probe Type	Reset Type	Input Voltage Range, V AC	Ht.	Wd.	Dp.	Enclosure Rating	Features		Each
For 1/16 DIN Panel Cutout Size–For 1 3/4" Ht. × 1 3/4" Wd. Panel Cutout



		B, C, E, J, K, L, N, PL-II, R, S, T	1	Heating—1 Mechanical Relay	SPDT	2 amp @ 240V AC	Thermocouple	Manual	90 to 264	1 7/8"	1 7/8"	3 3/4"	IP20, IP30	Indicator Icons, Remote Reset	0000000	0000000


		B, C, E, J, K, L, N, PL-II, R, S, T	2	Heating—1 Mechanical Relay Heating—1 Mechanical Relay	SPDT SPST-NO	2 amp @ 240V AC	Thermocouple	Manual	90 to 264	1 7/8"	1 7/8"	3 3/4"	IP20, IP30	—	0000000	000000


		For 1/4 DIN Panel Cutout Size–For 3 5/8" Ht. × 3 5/8" Wd. Panel Cutout



				B, C, E, J, K, L, N, PL-II, R, S, T	2	Heating—1 Mechanical Relay Heating—1 Mechanical Relay	SPDT	2 amp @ 240V AC	Thermocouple	Manual	90 to 250	3 3/4"	3 3/4"	2 9/16"	IP20, IP30	Remote Reset	0000000	000000

Accessories for Temperature Controllers

DIN-Rail/Surface-Mount Adapters for 1/16 DIN Controllers

Mounting Fasteners

Not Included

DIN-Rail/Surface-Mount Adapters for 1/16 DIN Controllers—To mount _1/16 DIN controllers to a surface or DIN rail, add DIN-rail/surface-mount adapters.

Mounting
Fasteners Included	Screw Size	No. of Holes		Each
No	No. 6	2	000000000	000000

DIN Cutout Adapters for 1/16 DIN Controllers

Mounting Fasteners

Included

DIN Cutout Adapters for 1/16 DIN Controllers—To convert larger cutouts to fit _1/16 DIN controllers, add DIN cutout adapters.

	Mounting
For DIN Panel Cutout Size	Fasteners Included	Screw Size	No. of Holes		Each
1/16, 1/4	Yes	No. 8	4	000000000	000000
1/16, 1/8	Yes	No. 8	4	000000000	00000

Washdown On/Off Temperature Controllers

Rated IP65 and NEMA 4X to seal out water and dust, these temperature controllers turn your equipment on and off in areas with frequent washdowns. They're the simplest type of temperature controller, so they switch your heater or other device fully on or off without a middle state when they reach a given temperature. These controllers work great as alarms and in systems that can't handle rapid switching or have slow temperature changes. However, you shouldn't use them in processes that require precise control over temperatures.

To read temperature, these controllers use a highly sensitive thermocouple or RTD probe (not included). Their mechanical relay actuates circuits directly. All are SPDT (single pole, double throw) and can turn one circuit from off to on (normally open) or on to off (normally closed). Since these controllers reset automatically, they turn off and on again as the temperature fluctuates. Use the keypad to set the actuation point, reset point, and other settings. Mount them into instrument panel cutouts.

These controllers have UL recognized components and are CSA certified and CE marked, so they meet American, Canadian, and European safety standards.

For Thermocouple Probe

Image of Product. Front orientation. Temperature Controllers. Washdown On/Off Temperature Controllers.

					Mechanical Relay
	Temperature Control Range	For Thermocouple Probe Type	Total No. of Outputs	Output Type	Switch Designation	Max. Switching Current @ Voltage	Reset Type	Input Voltage, V AC	Enclosure Rating		Each
For 2 11/16" Ht. × 2 11/16" Wd. Panel Cutout



		32° F to 390° F 0° C to 200° C	J	1	Heating—1 Mechanical Relay	SPDT	8 amp @ 240V AC 8 amp @ 30V DC	Automatic	120	IP65, NEMA 4X	000000	0000000


		32° F to 2,190° F 0° C to 1,200° C	K	1	Heating—1 Mechanical Relay	SPDT	8 amp @ 240V AC 8 amp @ 30V DC	Automatic	120	IP65, NEMA 4X	000000	000000

For RTD Probe

					Mechanical Relay
	Temperature Control Range	For RTD Probe Resistance, ohm	Total No. of Outputs	Output Type	Switch Designation	Max. Switching Current @ Voltage	Reset Type	Input Voltage, V AC	Enclosure Rating		Each
For 2 11/16" Ht. × 2 11/16" Wd. Panel Cutout



		32° F to 1,470° F 0° C to 800° C	100	1	Heating—1 Mechanical Relay	SPDT	8 amp @ 240V AC 8 amp @ 30V DC	Automatic	120	IP65, NEMA 4X	000000	0000000

Washdown Autotuning Temperature Controllers

The faceplate on these controllers is sealed to meet NEMA 4X and IP66 for protection in washdown environments with splashing water, corrosive liquid, and dust. The rear case meets IP20, which prevents objects about the size of a finger from coming into contact with a live circuit.

Because they have proportional-integral-derivative (PID) software, these controllers are ideal for turning heating equipment on and off in systems with rapid, unpredictable, and complex temperature changes. They help you achieve precise and stable temperature control with fuzzy logic that learns system behavior and automatically compensates for changes. Use the autotuning function to cycle and identify the ideal PID variables for your system to achieve the most precise control. These controllers read temperature with a highly sensitive thermocouple probe (sold separately) in critical process applications. All fit into instrument panels with DIN cutouts. Use the keypad to adjust the actuation point, reset point, and other settings.

Controllers with Mechanical Relay Heating Output


For 1/8 DIN Panel Cutout Size	For 1/4 DIN Panel Cutout Size

Mechanical relay outputs actuate circuits directly.

SPDT—Single pole, double throw (SPDT) relays can be set to turn the circuit from off to on (normally open) or from on to off (normally closed).

SPST-NO—Single pole, single throw (SPST) relays turn one circuit from off to on (normally open).

Automatic Reset—Controllers with automatic reset switch off and on again automatically as the temperature fluctuates.

Manual Reset—Controllers with automatic/manual reset give you the choice to have machines turn back on either automatically when the temperature fluctuates, or you can manually reset their switch. When set to manual they shut down your machine when it gets too hot to protect equipment and personnel. They won’t turn the machine back on until you reset their switch. They have a second output to actuate an alarm or another simple device.

			Mechanical Relay
	Total No. of Outputs	Output Type	Switch Designation	Max. Switching Current @ Voltage	For Probe Type	Reset Type	Input Voltage Range, V AC	Enclosure Rating		Each
For 1/8 DIN Panel Cutout Size–For 3 3/4" Ht. × 1 3/4" Wd. Panel Cutout



		3	Heating—1 Mechanical Relay Alarming—2 Mechanical Relays	Heating—SPDT Alarm—SPST-NO	Heating— 5 amp @ 250V AC Alarming— 1 amp @ 250V AC	Thermocouple, RTD	Automatic, Manual	100 to 240	IP20, IP66, NEMA 4X	0000000	0000000


		For 1/4 DIN Panel Cutout Size–For 3 3/4" Ht. × 3 3/4" Wd. Panel Cutout



				3	Heating—1 Mechanical Relay Alarming—2 Mechanical Relays	Heating—SPDT Alarm—SPST-NO	Heating—3 amp @ 250V AC Alarming—1 amp @ 250V AC	Thermocouple, RTD	Automatic, Manual	100 to 240	IP20, IP66, NEMA 4X	0000000	000000

Proportional Temperature Controllers

Cycle heaters on and off intermittently to maintain a set temperature in your system. These proportional controllers keep your heater on when your system is below the set temperature, and they turn it off in short cycles when your system nears the set temperature. The short cycles make them more precise and allow less temperature fluctuation than on/off controllers. Use them on electric heaters only—they don't work with valves or solenoids.

Turn the dial on these controllers to choose your set temperature. They use a highly sensitive thermocouple probe (not included) to read temperature. Their mechanical relay actuates circuits directly. All are SPDT (single pole, double throw) and can turn one circuit from off to on (normally open) or on to off (normally closed). Install these controllers into instrument panels with DIN cutouts.

All controllers meet American, Canadian, and European safety standards.

Controllers with Mechanical Relay Heating Output

					Mechanical Relay
	Temp. Control Range, ° F	For Thermocouple Probe Type	Total No. of Outputs	Output Type	Switch Designation	Max. Switching Current @ Voltage	For Probe Type	Reset Type	Input Voltage Range, V AC	Ht.	Wd.	Dp.	Features		Each
For 1/16 DIN Panel Cutout Size–For 1 3/4" Ht. × 1 3/4" Wd. Panel Cutout



		35 to 390	K	1	Heating—1 Mechanical Relay	SPDT	3 amp @ 250V AC	Thermocouple	Automatic	100 to 240	2 1/4"	1 7/8"	3 3/4"	LED Status Indicator	0000000	0000000


		35 to 750	K	1	Heating—1 Mechanical Relay	SPDT	3 amp @ 250V AC	Thermocouple	Automatic	100 to 240	2 1/4"	1 7/8"	3 3/4"	LED Status Indicator	0000000	000000
		35 to 2,190	K	1	Heating—1 Mechanical Relay	SPDT	3 amp @ 250V AC	Thermocouple	Automatic	100 to 240	2 1/4"	1 7/8"	3 3/4"	LED Status Indicator	0000000	000000
		50 to 850	J	1	Heating—1 Mechanical Relay	SPDT	5 amp @ 240V AC	Thermocouple	Automatic	200 to 240	1 7/8"	1 7/8"	3 3/4"	LED Status Indicator	0000000	000000

Accessories for Temperature Controllers

DIN-Rail/Surface-Mount Adapters for 1/16 DIN Controllers

Mounting Fasteners

Not Included

DIN-Rail/Surface-Mount Adapters for 1/16 DIN Controllers—DIN-rail/surface-mount adapters mount _1/16 DIN controllers to a DIN rail or surface.

Mounting
Fasteners Included	Screw Size	No. of Holes		Each
No	No. 6	2	000000000	000000

DIN Cutout Adapters for 1/16 DIN Controllers

Mounting Fasteners

Included

DIN Cutout Adapters for 1/16 DIN Controllers—DIN cutout adapters convert larger cutouts to fit _1/16 DIN controllers.

	Mounting
For DIN Panel Cutout Size	Fasteners Included	Screw Size	No. of Holes		Each
1/16, 1/4	Yes	No. 8	4	000000000	000000
1/16, 1/8	Yes	No. 8	4	000000000	00000