Switch Starting Position Switch Starting Position |
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Probe Type Probe Type |
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Current Current |
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Switch Type Switch Type |
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Industry Designation Industry Designation |
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Probe Material Probe Material |
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Wire Connection Type Wire Connection Type |
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Screw Terminals | Wire Leads |
Specifications Met Specifications Met |
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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 | |||||||||||
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Temp. Range, °F | Voltage (Electrical Phase) | Current | Dia. | Lg. | Material | Ht. | Wd. | Dp. | Fasteners Included | 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 | 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 | 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 | 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 | 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 | 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 | 0000000 | 000000 |
Packing Seals and Fittings | 0000000 | Each | 000000 |
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 | |||||||||||||
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Temp. Range | Temp. Accuracy | No. of Actuation Points | Voltage (Electrical Phase) | Current | Dia. | Lg. | Wire Connection Type | Ht. | Wd. | Dp. | 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" | UL Listed; CSA Certified; CE Marked; NEMA 4X | 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" | UL Listed; CSA Certified; CE Marked; NEMA 4X | 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" | UL Listed; CSA Certified; CE Marked; NEMA 4X | 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" | UL Listed; CSA Certified; CE Marked; NEMA 4X | 0000000 | 000000 |
Packing Seals and Fittings | 0000000 | Each | 000000 |
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 | |||||||||||||
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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 | 0000000 |
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 |
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 | ||||||||||
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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 | 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 | 00000 |
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 | 00000 |
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 | 00000 |
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 | ||||||||||
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Temp. Range, °F | Voltage (Electrical Phase) | Current | Dia. | Lg. | Max. Pressure, psi | Ht. | Wd. | Dp. | 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" | 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" | 00000000 | 000000 |