Flange-Mount Immersion Heater Temperature Switches

	Voltage Voltage

120V AC

240V AC

277V AC

480V AC

10 to 32V DC

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

	Probe Type Probe Type

Threaded

Unthreaded

	Number of Circuits Controlled Number of Circuits Controlled

	Switch Starting Position Switch Starting Position

1 Off (Normally Open) or 1 On
(Normally Closed)

1 Off (Normally Open)

1 On (Normally Closed)

2 On (Normally Closed)

1 Off (Normally Open) and 1
On (Normally Closed)

2 Off (Normally Open)

	Electrical Phase Electrical Phase

Single

Three

	Scale Scale

Fahrenheit

Celsius

	Current Current

	Pipe Size Pipe Size

1/4

3/8

1/2

	Switch Type Switch Type

Remote Reading

Direct Reading

	Probe Length Probe Length

	Industry Designation Industry Designation

SPDT

Single Pole, Single Throw
(SPST)

Double Pole, Single Throw
(DPST)

	Maximum Pressure Maximum Pressure

	Electrical Connection Type Electrical Connection Type

Hardwire

Plug

	Probe Material Probe Material

Copper

Stainless Steel

Brass

	Specifications Met Specifications Met

	Adjustment Method Adjustment Method

Dial

Screw

	Maximum Housing Temperature Maximum Housing Temperature

	Number of Actuation Points Number of Actuation Points

	Probe Diameter Probe Diameter

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Wire Connection Type Wire Connection Type


Screw Terminals	Wire Leads

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25 Products

Wall-Mount Temperature Switches

Single Pole, Double Throw (SPDT) Switch with Enclosed Housing

Double Pole, Single
Throw (DPST) Switch
with Enclosed Housing

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 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).

Switches that control two circuits are double pole, single throw (DPST). They turn two circuits from on to off (normally closed).

Switches with a pilot light indicate when the switch is on.

Use packing seals and fittings (sold separately) to seal the probe into threaded tanks and pipes.

			Probe
Temp. Range, °F	Voltage (Electrical Phase)	Current	Dia.	Lg.	Material	Ht.	Wd.	Dp.	Fasteners Included	Environmental Rating		Each
Switches
Single Pole, Double Throw (SPDT)—1 Circuit Controlled
Enclosed Housing
-130° to 120°	120V AC, 240V AC, 480V AC (Single)	15A	3/8"	4 1/2"	Copper	3 1/4"	3 1/2"	2 13/16"	No	NEMA 1	00000000	0000000
0° to 150°	120V AC, 240V AC, 480V AC (Single)	15A	3/8"	6 7/8"	Copper	3 1/4"	3 1/2"	2 13/16"	No	NEMA 1	00000000	000000
50° to 300°	120V AC, 240V AC, 480V AC (Single)	15A	3/8"	4 1/2"	Copper	3 1/4"	3 1/2"	2 13/16"	No	NEMA 1	00000000	000000
150° to 650°	120V AC, 240V AC, 480V AC (Single)	15A	3/8"	3 5/8"	Copper	3 1/4"	3 1/2"	2 13/16"	No	NEMA 1	00000000	000000
Double Pole, Single Throw (DPST)—2 Circuit Controlled
Enclosed Housing
0° to 100°	120V AC (Single), 277V AC (Three)	30A	3/8"	4 3/16"	Copper	5 3/4"	3"	3 1/8"	No	NEMA 1	0000000	000000
Switches with Pilot Light
Double Pole, Single Throw (DPST)—2 Circuit Controlled
Enclosed Housing
0° to 100°	120V AC (Single), 277V AC (Three)	30A	3/8"	4 3/16"	Copper	5 3/4"	3"	3 1/8"	No	NEMA 1	0000000	000000

Packing Seals and Fittings

0000000

Each

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.

Single pole, double throw (SPDT) 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 single pole, double throw (SPDT) 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 single pole, double throw (SPDT) 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	Temp. Accuracy	No. of Actuation Points	Voltage (Electrical Phase)	Current	Dia.	Lg.	Wire Connection Type	Ht.	Wd.	Dp.	Environmental Rating	Specifications Met		Each
Single Pole, Double Throw (SPDT)—1 Circuit Controlled
Threaded Copper Probe—1/2 NPT Male
30° to 250° F	±3° F	1	120V AC, 240V AC, 480V AC (Single)	15A	3/8"	2 5/8"	Screw Terminals	8 11/16"	4"	2 3/8"	NEMA 4X	UL Listed; C-UL Listed; CE Marked	0000000	0000000
100° to 400° F	±4° F	1	120V AC, 240V AC, 480V AC (Single)	15A	3/8"	2 1/8"	Screw Terminals	8 11/16"	4"	2 3/8"	NEMA 4X	UL Listed; C-UL Listed; CE Marked	0000000	000000
Single Pole, Double Throw (SPDT)—2 Circuit Controlled
Unthreaded Stainless Steel Probe
30° to 250° F	±5° F	2	120V AC, 240V AC, 480V AC (Single)	15A	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	000000
100° to 400° F	±8° F	2	120V AC, 240V AC, 480V AC (Single)	15A	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

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.

Switch with one actuation point has one single pole, double throw (SPDT) 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.

Switch with two actuation points has two single pole, double throw (SPDT) 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, °F	Temp. Accuracy, °F	No. of Actuation Points	Voltage (Electrical Phase)	Current	Dia.	Lg.	Ht.	Wd.	Dp.	Environmental Rating	Includes		Each
Single Pole, Double Throw (SPDT)—1 Circuit Controlled
Threaded Stainless Steel Probe—1/2 NPT Male
30° to 250°	±5°	1	120V AC, 240V AC, 480V AC (Single)	15A	3/8"	2 5/8"	9 5/16"	5 1/8"	5 3/16"	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 IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IP66 NEMA 4X NEMA 7 NEMA 9	1/2 × 3/4 NPT Adapter Bushing	0000000	000000000
Single Pole, Double Throw (SPDT)—2 Circuit Controlled
Unthreaded Stainless Steel Probe
30° to 250°	±5°	2	120V AC, 240V AC, 480V AC (Single)	15A	3/8"	2 5/8"	9 5/16"	5 1/8"	5 3/16"	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 IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IP66 NEMA 4X NEMA 7 NEMA 9	__	0000000	000000

Packing Seals and Fittings

0000000

Each

000000

Compact Threaded Temperature Switches

NPT Male Threaded

NPT Male × NPT Male Threaded

Since these switches don’t have a housing above the probe, they are often used in tight spaces and low-clearance areas. The threaded probe installs directly into tanks, pipelines, and other process components to turn heating equipment on or off at a specified temperature. Use the adjustment screw to set the actuation point. All switches are single pole, single throw (SPST) and control one circuit.

Normally open switches turn the circuit from off to on.

Normally closed switches turn the circuit from on to off.

					Probe
Pipe Size	Temp. Range, °F	Temp. Accuracy, °F	Voltage (Electrical Phase)	Current	Dia.	Lg.	Material	Insulation Material		Each
1 Off (Normally Open)
NPT Male Threaded
3/8	-100° to 600°	±12°	120V AC, 240V AC (Single)	3 A @ 240 V AC, 5 A @ 120 V AC	1/2"	2"	Stainless Steel	Fiberglass	0000000	0000000
NPT Male × NPT Male Threaded
3/8 × 3/8	-100° to 600°	±12°	120V AC, 240V AC (Single)	3 A @ 240 V AC, 5 A @ 120 V AC	1/2"	2"	Stainless Steel	Fiberglass	0000000	000000
1 On (Normally Closed)
NPT Male Threaded
3/8	-100° to 600°	±12°	120V AC, 240V AC (Single)	3 A @ 240 V AC, 5 A @ 120 V AC	1/2"	2"	Stainless Steel	Fiberglass	0000000	000000
NPT Male × NPT Male Threaded
3/8 × 3/8	-100° to 600°	±12°	120V AC, 240V AC (Single)	3 A @ 240 V AC, 5 A @ 120 V AC	1/2"	2"	Stainless Steel	Fiberglass	0000000	000000

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 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	Voltage (Electrical Phase)	Current	Dia.	Lg.	Max. Pressure, psi	Ht.	Wd.	Dp.	Environmental Rating	Specifications Met		Each
Threaded Brass Probe—3/8 NPT Male
0° to 225°	120V AC, 240V AC, 480V AC (Single)	15A	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°	120V AC, 240V AC, 480V AC (Single)	15A	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

Easy-Adjust Threaded Temperature Switches

Easy-Adjust Rings

Switch heating equipment on and off at a specified temperature by installing these electronic switches directly into tanks, pipelines, and other process components. Simply twist the outer rings to adjust your set point—no need for tools. A locking ring keeps the sensor in place. Once the set point is reached, an LED illuminates, indicating the switching status. These switches produce an electronic PNP signal output and are often used to communicate with programmable logic controllers (PLC) in hydraulics, pneumatics, air-conditioning, and refrigeration applications. Because they are electronic, they provide more flexibility and control than other switches, making them ideal for control and automation applications.

Made of stainless steel, these switches resist corrosion and chemicals. They are rated IP67 for protection from dust and temporary submersion. They also meet U.S., Canadian, and European safety standards. These switches have an micro M12 plug connection and are compatible with micro M12 sockets, allowing you to quickly connect and disconnect the switch.

To view switch wiring diagrams, select a part number and click Product Detail.

BSPP connections are also known as G connections.

Normally open switches turn the circuit from off to on. Normally closed switches turn the circuit from on to off.

Switches with one actuation point have an adjustable differential, so they activate at a range above and below the desired set point, limiting the frequency of switching.

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

Switches

1 7/8" Probe

9 3/4" Probe

4-Pin
Micro
M12 Plug

Adjustment Lock

						Probe
Temp. Range	Temp. Accuracy	No. of Actuation Points	Actuation Tolerance	Voltage Range	Current	Dia.	Lg.	Max. Pressure, psi	Plug Type	Dia.	Ht.	Features		Each
1 Off (Normally Open) and 1 On (Normally Closed)
Single Pole, Single Throw (SPST)—2 Circuit Controlled
Threaded Stainless Steel Probe—1/4 BSPP Male
0° to 280° F / -20° to 140° C	±5° F / ±3° C	1	±1%	10V DC to 32V DC	0.5A	1/4"	1 7/8"	5,800	4-Pin Micro M12	1"	4 1/4"	Adjustment Lock, LED Indicator	00000000	0000000
Threaded Stainless Steel Probe—1/2 BSPP Male
0° to 280° F / -20° to 140° C	±5° F / ±3° C	2	±1%	10V DC to 32V DC	0.5A	1/4"	9 3/4"	4,300	4-Pin Micro M12	1"	12"	Adjustment Lock, LED Indicator	00000000	000000
Threaded Stainless Steel Probe—1/4 NPT Male
0° to 280° F / -20° to 140° C	±5° F / ±3° C	1	±1%	10V DC to 32V DC	0.5A	1/4"	1 7/8"	5,800	4-Pin Micro M12	1"	4 1/4"	Adjustment Lock, LED Indicator	00000000	000000
2 Off (Normally Open)
Single Pole, Single Throw (SPST)—2 Circuit Controlled
Threaded Stainless Steel Probe—1/4 BSPP Male
0° to 280° F / -20° to 140° C	±5° F / ±3° C	2	±1%	10V DC to 32V DC	0.5A	1/4"	1 7/8"	5,800	4-Pin Micro M12	1"	4 1/4"	Adjustment Lock, LED Indicator	00000000	000000
Threaded Stainless Steel Probe—1/4 NPT Male
0° to 280° F / -20° to 140° C	±5° F / ±3° C	2	±1%	10V DC to 32V DC	0.5A	1/4"	1 7/8"	5,800	4-Pin Micro M12	1"	4 1/4"	Adjustment Lock, LED Indicator	00000000	000000

Micro M12 Socket Connectors with Cable

Connector

								Housing Thread
Number of Poles	Number of Keyways	Face Diameter	Voltage	Current	Wire Lead Gauge	Cable OD	Housing Material	Size	Pitch	Type	Temperature Range, °F		Each
4	1	0.3"	250V AC/250V DC	4A	22	0.25"	PVC Plastic	M12	1 mm	Metric	0° to 220°	0000000	000000