Compact Threaded Temperature Switches
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 SPST (single pole, single throw) and control one circuit.
Normally closed switches turn the circuit from on to off.
For technical drawings and 3-D models, click on a part number.
Probe | 1 On (Normally Closed) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Temp. Range, °F | Actuation Tolerance | Electrical Phase | Max. Switching Current @ Voltage | Dia. | Lg. | Material | Insulation Material | Each | |
NPT Male Threaded | ||||||||||
| 3/8 | -100° to 600° | ±2% | Single | 5 A @ 120 V AC 3 A @ 240 V AC 1 A @ 120 V DC | 1/2" | 2" | Stainless Steel | Fiberglass | 0000000 | 0000000 |
| 1/2 | -100° to 600° | ±2% | Single | 10 A @ 120 V AC 5 A @ 240 V AC 2 A @ 120 V DC | 5/8" | 3" | Stainless Steel | Fiberglass | 0000000 | 000000 |
NPT Male × NPT Male Threaded | ||||||||||
| 3/8 × 3/8 | -100° to 600° | ±2% | Single | 5 A @ 120 V AC 3 A @ 240 V AC 1 A @ 120 V DC | 1/2" | 2" | Stainless Steel | Fiberglass | 0000000 | 000000 |
| 1/2 × 1/2 | -100° to 600° | ±2% | Single | 10 A @ 120 V AC 5 A @ 240 V AC 2 A @ 120 V DC | 5/8" | 3" | Stainless Steel | Fiberglass | 0000000 | 000000 |
Fixed-Setpoint Threaded Temperature Switches
Set to actuate at a specific temperature, these switches are easy to setup and prevent changes to the setpoint. They have a threaded probe, so they install directly into tanks, pipelines, and other process components to turn equipment on and off at a set temperature.
Narrow differential switches reset after a small temperature change in the opposite direction of your switch's actuation. For example, in a rising-actuation switch, they reset after the temperature falls 3° below the setpoint. Use them in systems where temperature changes slowly and where you need precision. Wide differential switches reset after the temperature significantly decreases (approximately 15%) below the setpoint. Use them in systems that cannot handle frequent power cycling.
Rising actuation switches activate when the temperature rises to the setpoint and then reset when the temperature falls below the setpoint. Choose rising actuation SPST-NC switches to turn off a heater or other equipment when the temperature rises to the setpoint.
Falling actuation switches activate when the temperature falls to the setpoint and then reset when the temperature rises above the setpoint. Choose falling actuation SPST-NC switches to turn off a cooler or other equipment when the temperature falls to the setpoint.
All switches are NEMA 4 and 13 rated to seal out dirt, oil, and water from washdowns. IP67 rated switches stand up to temporary submersion. UL and C-UL listed switches meet U.S. and Canadian safety standards.
For technical drawings and 3-D models, click on a part number.
Probe | SPST-NC | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Actuation Point, °F | Actuation Tolerance | Approx. Difference Between Setpoint and Reset Point, °F | Max. Switching Current @ Voltage (Electrical Phase) | Dia. | Lg. | Max. Pressure, psi | Environmental Rating | Specifications Met | Each | |
Threaded Brass Probe—1/2 NPT Male | ||||||||||
Narrow Differential Range Sensitivity—Rising Actuation | ||||||||||
| 40° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 000000 |
| 60° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 80° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 100° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 120° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 140° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 160° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 180° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 200° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 220° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 240° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 260° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 280° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 300° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
Narrow Differential Range Sensitivity—Falling Actuation | ||||||||||
| 40° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 60° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 80° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 100° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 120° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 140° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 160° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 180° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 200° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 220° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 240° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 260° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 280° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
| 300° | ±5° F | 3° | 6 A @ 120 V AC (Single) 4 A @ 24 V DC (Single) | 3/8" | 1/2" | 5,000 | NEMA 4, NEMA 13 | UL Recognized Component, C-UL Recognized Component | 0000000 | 00000 |
Wide Differential Range Sensitivity—Rising Actuation | ||||||||||
| 50° | ±7° F | 8° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 75° | ±7° F | 12° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 100° | ±7° F | 15° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 125° | ±7° F | 19° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 150° | ±7° F | 23° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 175° | ±7° F | 27° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 200° | ±7° F | 30° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 225° | ±7° F | 34° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 250° | ±7° F | 38° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
| 275° | ±7° F | 42° | 15 A @ 125 V AC (Single) 10 A @ 250 V AC (Single) | 11/16" | 1/2" | 1,000 | IP67, NEMA 4, NEMA 13 | __ | 0000000 | 00000 |
Insertion Temperature Switches
Install the probe directly into drilled and reamed holes to turn heating equipment on or off at a specified temperature. Use the adjustment screw to set the actuation point. All switches are SPST (single pole, single throw) and control one circuit.
Normally closed switches turn the circuit from on to off.
For technical drawings and 3-D models, click on a part number.
Probe | Material | 1 On (Normally Closed) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Temp. Range, °F | Actuation Tolerance | Max. Switching Current | Electrical Phase | Insulation | Probe | Each | |
| 2 1/2" | 1/2" | -100° to 600° | ±2% | 5 A @ 120 V AC 3 A @ 240 V AC 1 A @ 120 V DC | Single | Fiberglass | Stainless Steel | 0000000 | 000000 |
| 3 5/8" | 5/8" | -100° to 600° | ±2% | 10 A @ 120 V AC 5 A @ 240 V AC 2 A @ 120 V DC | Single | Fiberglass | Stainless Steel | 0000000 | 00000 |