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 open switches turn the circuit from off to on.
Normally closed switches turn the circuit from on to off.
For technical drawings and 3-D models, click on a part number.
Probe | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Temp. Range, °F | Actuation Tolerance | Electrical Phase | Max. Switching Current @ Voltage | Dia. | Lg. | Material | Insulation Material | Each | |
1 Off (Normally Open)  | ||||||||||
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 |
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 On (Normally Closed) | ||||||||||
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 | 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 |
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. Range, °F | Electrical Phase | Max. Switching Current @ Voltage | Dia. | Lg. | Max. Pressure, psi | Ht. | Wd. | Dp. | Environmental Rating | Specifications Met | Each | |
Threaded Brass Probe—3/8 NPT Male | ||||||||||||
| 0° to 225° | Single | 15 A @ 125 V AC 15 A @ 250 V AC 20 A @ 480 V AC 2 A @ 30 V DC 500 mA @ 125 V DC | 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° | Single | 15 A @ 125 V AC 15 A @ 250 V AC 20 A @ 480 V AC 2 A @ 30 V DC 500 mA @ 125 V DC | 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 |