FM Approved Temperature Switches

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15 Products

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.

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).

For technical drawings and 3-D models, click on a part number.

							Probe
Temp. Range, °F	Temp. Accuracy, °F	No. of Actuation Points	Actuation Tolerance	No. of Circuits Controlled	Electrical Phase	Max. Switching Current @ Voltage	Dia.	Lg.	Max. Pressure, psi	Ht.	Wd.	Dp.	Environmental Rating	Specifications Met		Each
Threaded Brass Probe—1/2 NPT Male
0° to 225°	±5°	2	±1%	2	Single	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC	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	0000000

Washdown Wall-Mount Temperature Switches

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 (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 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).

For technical drawings and 3-D models, click on a part number.

					Probe
Temp. Range	Temp. Accuracy	No. of Actuation Points	Electrical Phase	Max. Switching Current	Dia.	Lg.	Wire Connection Type	Ht.	Wd.	Dp.	Environmental Rating	Specifications Met		Each
SPDT—2 Circuit Controlled
Unthreaded Stainless Steel Probe
30° to 250° F	±5° F	2	Single	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC	3/8"	2 5/8"	Screw Terminals	6 11/16"	5 5/32"	5 1/2"	NEMA 4X	UL Listed; C-UL Listed; CE Marked; FM Approved	0000000	0000000
100° to 400° F	±8° F	2	Single	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC	3/8"	2 1/8"	Screw Terminals	6 11/16"	5 5/32"	5 1/2"	NEMA 4X	UL Listed; C-UL Listed; CE Marked; FM Approved	0000000	000000

Packing Seals and Fittings

0000000

Each

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Hazardous Location Surface-Mount Temperature Switches

Safe for use in chemical plants, refineries, and other hazardous locations, these switches maintain your surface’s temperature by turning equipment on or off when they reach a set temperature. They’re FM approved for use where flammable gases may be present. 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 and CSA certified, they also meet American and Canadian safety standards.

						Mounting Holes				SPDT
Actuation Point, °F	Actuation Tolerance	Approx. Difference Between Setpoint and Reset Point, °F	Max. Switching Current @ Voltage (Electrical Phase)	Ht.	Wd.	No. of	Dia.	Environmental Rating	Specifications Met		Each
Nonadjustable Rising Actuation Point
47°	±6° F	10°	15 A @ 240 V AC (Single)	2 7/8"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	CSA-US Certified, CSA Certified, FM Approved	0000000	0000000
60°	±6° F	15°	15 A @ 240 V AC (Single)	2 15/16"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	CSA-US Certified, CSA Certified, FM Approved	0000000	000000
75°	±6° F	15°	15 A @ 240 V AC (Single)	2 15/16"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	CSA-US Certified, CSA Certified, FM Approved	0000000	000000
105°	±6° F	15°	15 A @ 240 V AC (Single)	2 15/16"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	CSA-US Certified, CSA Certified, FM Approved	0000000	000000
200°	±6° F	15°	15 A @ 240 V AC (Single)	2 15/16"	2"	2	11/64"	NEC Class I Division 2 Groups A, B, C, D	CSA-US Certified, CSA Certified, FM Approved	0000000	000000

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

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

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.

To mount 1/16 DIN controllers to a surface or DIN rail, add DIN-rail/surface-mount adapters. To convert larger cutouts to fit 1/16 DIN controllers, add DIN cutout adapters.

Controllers

1/16 DIN

1/4 DIN

		Mechanical Relay
Total No. of Outputs	Output Type	Industry Designation	Max. Switching Current @ Voltage	For Probe Type	Reset Type	Input Voltage Range	Environmental Rating	Features		Each
1/16 DIN—For 1 3/4" Ht. x 1 3/4" Wd. Panel Cutout
1	Heating—One Mechanical Relay	SPDT	2 A @ 240 V AC	Thermocouple	Manual	90V AC to 264V AC	IP20, IP30	Remote Reset	0000000	0000000
2	Heating—Two Mechanical Relays	SPST-NO SPDT	2 A @ 240 V AC	Thermocouple	Manual	90V AC to 264V AC	IP20, IP30	__	0000000	000000
1/4 DIN—For 3 5/8" Ht. x 3 5/8" Wd. Panel Cutout
2	Heating—Two Mechanical Relays	SPDT	2 A @ 240 V AC	Thermocouple	Manual	90V AC to 250V AC	IP20, IP30	Remote Reset	0000000	000000

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

DIN-Rail/Surface-Mount Adapter

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

DIN Cutout Adapters for 1/16 DIN Controllers

DIN Cutout Adapter

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