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.
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-NO switches to power a cooler or trigger an alarm. Choose rising actuation SPST-NC switches to turn off a heater or other equipment when the temperature rises 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.
Probe | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 | Each | |
SPST-NO | |||||||||
Threaded Brass Probe—1/2 NPT Male | |||||||||
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 | 000000 |
| 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 |
SPST-NC | |||||||||
Threaded Brass Probe—1/2 NPT Male | |||||||||
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 |
Electronic Temperature Switches with Digital Display
Micro
M12 Plug
A digital display makes it easy to monitor the temperature and control when these switches turn heating equipment on and off. They have an adjustable reset, so you can change the temperature range between when they activate and deactivate, commonly referred to as deadband and differential. Use the keypad to adjust the setpoint and reset point anywhere on the setpoint range. They produce an electronic signal that is often used to communicate with a programmable logic controller (PLC), so they're common in control and automation applications. Install them directly into tanks, pipelines, and other process components using their threaded probe.
These switches have a micro M12 plug, so you can quickly connect and disconnect them.
Rated IP65 and IP67, these switches protect against dust and water from washdowns and temporary submersion. They’re also UL listed, C-UL listed, and CE marked, so they meet U.S., Canadian, and European safety standards.
Probe | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. Range | Approx. Difference Between Setpoint and Reset Point | Temp. Accuracy | Actuation Tolerance | Signal Output Type | Max. Switching Current @ Voltage  | Dia. | Lg. | Max. Pressure, psi | Plug Type | Environmental Rating | Specifications Met | Each | |
2 Circuits Controlled—2 Off (Normally Open) or 2 On (Normally Closed) | |||||||||||||
Threaded Stainless Steel Probe—1/4 NPT Male | |||||||||||||
| 0º to 170° F / -20º to 80° C | Adjustable | ±0.6° F / ±0.9° C | ±0.5% | PNP | 250 mA @ 35 V DC | 1/4" | 1" | 2,100 | 4-Pole Micro M12 | IP65, IP67 | UL Listed; C-UL Listed; CE Marked | 0000000 | 0000000 |
| 0º to 240° F / -20º to 120° C | Adjustable | ±0.8° F / ±1° C | ±0.5% | PNP | 250 mA @ 35 V DC | 1/4" | 6" | 725 | 4-Pole Micro M12 | IP65, IP67 | UL Listed; C-UL Listed; CE Marked | 0000000 | 000000 |
Adjustable-Reset Electronic Temperature Switches
An adjustable reset lets you control the amount of temperature change, also known as deadband and differential, before these switches reset. Twist the rings to select the setpoint temperature and reset temperature anywhere within the setpoint range. When they reach the set temperature, they send an electronic signal to your programmable logic controller (PLC) to turn equipment on or off. Because they control two circuits, they turn one device from off to on (normally open) and another from on to off (normally closed). An LED illuminates to indicate they’re switching. These switches are often used in control and automation in hydraulics, pneumatics, air-conditioning, and refrigeration applications. Made of stainless steel, they resist corrosion and chemicals.
Install these switches directly into tanks, pipelines, and other process components using their threaded probe. They have a micro M12 plug connection and are compatible with micro M12 sockets, so you can quickly connect and disconnect them. After selecting your setpoint, tighten the locking ring to prevent unintentional changes.
IP rated, these switches seal out dust and water from temporary submersion. They also meet U.S., Canadian, and European safety standards.
To view switch wiring diagrams, select a part number and click Product Detail.
Micro
M12 Plug
Probe | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. Range | Approx. Difference Between Setpoint and Reset Point | Temp. Accuracy | Actuation Tolerance | Signal Output Type | Max. Switching Current @ Voltage | Dia. | Lg. | Max. Pressure, psi | Plug Type | Environmental Rating | Features | Each | |
2 Circuits Controlled—1 Off (Normally Open) and 1 On (Normally Closed) | |||||||||||||
Threaded Stainless Steel Probe—1/4 BSPP Male | |||||||||||||
| 0° to 280° F / -20° to 140° C | Adjustable | ±5° F / ±3° C | ±1% | PNP | 500 mA @ 32 V DC | 1/4" | 1 7/8" | 5,800 | 4-Pole Micro M12 | IP67 | Adjustment Lock, LED Indicator | 00000000 | 0000000 |
Threaded Stainless Steel Probe—1/4 NPT Male | |||||||||||||
| 0° to 280° F / -20° to 140° C | Adjustable | ±5° F / ±3° C | ±1% | PNP | 500 mA @ 32 V DC | 1/4" | 1 7/8" | 5,800 | 4-Pole Micro M12 | IP67 | Adjustment Lock, LED Indicator | 00000000 | 000000 |
Housing Thread | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Poles | Face Diameter | Voltage | Current | Wire Lead Gauge | Cable OD | Housing Material | Size | Pitch | Type | Temperature Range, °F | Each | |
| 4 | 0.3" | 250V AC/250V DC | 4A | 22 | 0.25" | PVC Plastic | M12 | 1 mm | Metric | 0° to 220° | 0000000 | 000000 |
Dual-Setpoint Electronic Temperature Switches
Send signals to trigger two different processes, each with their own set temperatures. For example, use one setpoint to turn a heater on and off at one temperature and another to activate an alarm if the temperature rises too far above the cutoff point. Twist the outer ring to adjust your setpoints—no need for tools. After choosing your setpoint, tighten the locking ring to prevent unintentional changes. Once the setpoint is reached, an LED illuminates, indicating the switching status. The threaded probe installs directly into tanks, pipelines, and other process components.
These switches send an electronic PNP signal to your programmable logic controller (PLC), so they’re often used in control and automation applications. They have a micro M12 plug connection and are compatible with micro M12 sockets, allowing you to quickly connect and disconnect the switch.
They are rated IP67 for protection from dust and temporary submersion.
To view switch wiring diagrams, select a part number and click Product Detail.
 Adjustment Rings |  9 3/4" Probe | ||
 1 7/8" Probe | 4-Pole Micro M12 Plug | ||
Probe | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. Range | Approx. Difference Between Setpoint and Reset Point | Temp. Accuracy | Actuation Tolerance | Signal Output Type | Max. Switching Current @ Voltage | Dia. | Lg. | Max. Pressure, psi | Plug Type | Environmental Rating | Features | Each | |
2 Circuits Controlled—1 Off (Normally Open) and 1 On (Normally Closed) | |||||||||||||
Threaded Stainless Steel Probe—1/2 BSPP Male | |||||||||||||
| 0º to 280° F / -20º to 140° C | 9° F / 5° C | ±5° F / ±3° C | ±1% | PNP | 500 mA @ 32 V DC | 1/4" | 9 3/4" | 4,300 | 4-Pole Micro M12 | IP67 | Adjustment Lock, LED Indicator | 00000000 | 0000000 |
2 Circuits Controlled—2 Off (Normally Open) | |||||||||||||
Threaded Stainless Steel Probe—1/4 BSPP Male | |||||||||||||
| 0º to 280° F / -20º to 140° C | 9° F / 5° C | ±5° F / ±3° C | ±1% | PNP | 500 mA @ 32 V DC | 1/4" | 1 7/8" | 5,800 | 4-Pole Micro M12 | IP67 | Adjustment Lock, LED Indicator | 00000000 | 000000 |
Threaded Stainless Steel Probe—1/4 NPT Male | |||||||||||||
| 0º to 280° F / -20º to 140° C | 9° F / 5° C | ±5° F / ±3° C | ±1% | PNP | 500 mA @ 32 V DC | 1/4" | 1 7/8" | 5,800 | 4-Pole Micro M12 | IP67 | Adjustment Lock, LED Indicator | 00000000 | 000000 |
Housing Thread | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Poles | Face Diameter | Voltage | Current | Wire Lead Gauge | Cable OD | Housing Material | Size | Pitch | Type | Temperature Range, °F | Each | |
| 4 | 0.3" | 250V AC/250V DC | 4A | 22 | 0.25" | PVC Plastic | M12 | 1 mm | Metric | 0° to 220° | 0000000 | 000000 |
Electronic Insertion Flow Switches
Instead of disassembling your system for inline installation, thread these flow switches onto a mounting adapter (sold separately) and insert them into a pipe tee or pipe outlet. They send digital signals to your programmable logic controller (PLC) to activate automated controls or alarms when they reach a set flow rate. To calculate the flow rate, they generate a small amount of heat, then measure the cooling effect your liquid or gas has on it. This makes them ideal in applications with fluctuating temperatures. Use the buttons on the display to adjust the set point and other settings. These switches are accurate in any mounting orientation.
IP65 rated switches protect against dust and washdowns. IP67 rated switches withstand temporary submersion.
Set Point Range | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Pipe Size | For Liquids, gpm | For Gases, scfm | Max. Pressure | Temp. Range, °F | Max. Switching Current @ Voltage | Body Ht. | Probe Lg. | Environmental Rating | Specifications Met | Each | |
304 Stainless Steel Body | |||||||||||
One Digital NPN Signal Output | |||||||||||
| 1/4 1/2 3/4 1 | 0.02 to 1.5 0.05 to 4.9 0.13 to 12.7 0.23 to 23 | 0.14 to 2 0.54 to 8.05 1.21 to 18.11 2.15 to 32.21 | 4300 psi @ 70° F | -10° to 175° | 250 mA @ 19 V DC 250 mA @ 36 V DC | 2 11/16" | 1 13/16" | IP65, IP67 | C-UL Listed, CE Marked, UL Listed | 0000000 | 0000000 |
One Digital PNP Signal Output | |||||||||||
| 1/4 1/2 3/4 1 | 0.02 to 1.5 0.05 to 4.9 0.13 to 12.7 0.23 to 23 | 0.14 to 2 0.54 to 8.05 1.21 to 18.11 2.15 to 32.21 | 4300 psi @ 70° F | -10° to 175° | 250 mA @ 18 V DC 250 mA @ 36 V DC | 2 11/16" | 1 13/16" | IP65, IP67 | C-UL Listed, CE Marked, UL Listed | 0000000 | 000000 |
Two Digital NPN Signal Outputs | |||||||||||
| 1/4 1/2 3/4 1 | 0.02 to 1.5 0.05 to 4.9 0.13 to 12.7 0.23 to 23 | 0.14 to 2 0.54 to 8.05 1.21 to 18.11 2.15 to 32.21 | 4300 psi @ 70° F | -10° to 175° | 250 mA @ 19 V DC 250 mA @ 36 V DC | 2 11/16" | 1 13/16" | IP65, IP67 | C-UL Listed, CE Marked, UL Listed | 0000000 | 000000 |
Two Digital PNP Signal Outputs | |||||||||||
| 1/4 1/2 3/4 1 | 0.02 to 1.5 0.05 to 4.9 0.13 to 12.7 0.23 to 23 | 0.14 to 2 0.54 to 8.05 1.21 to 18.11 2.15 to 32.21 | 4300 psi @ 70° F | -10° to 175° | 250 mA @ 18 V DC 250 mA @ 36 V DC | 2 11/16" | 1 13/16" | IP65, IP67 | C-UL Listed, CE Marked, UL Listed | 0000000 | 000000 |
Sanitary Electronic Insertion Flow Switches
Easy to clean and install, these flow switches are 3-A certified to meet sanitary design standards and insert into your line with a quick-clamp mounting adapter (sold separately). They have a smooth probe, and unlike flow switches that measure with a paddle or turbine, these don’t have moving parts for contaminants to get stuck in. Rated IP67 and IP69K, they withstand temporary submersion and high-temperature, high-pressure washdowns. The mounting adapter attaches to a quick-clamp tube tee or outlet (often called tri-clamp fittings) in your large-diameter tubing system using a gasket and clamp (not included), so you don't need to disassemble your line for inline installation. This mounting adapter is also easy to remove and clean.
They send digital signals to your programmable logic controller (PLC) to activate automated controls or alarms when they reach a set flow rate. To calculate the flow rate, they generate a small amount of heat, then measure the cooling effect your liquid or gas has on it. This makes them ideal in applications with fluctuating temperatures. Use the buttons on the display to adjust the set point and other settings. They’re accurate in any mounting orientation.
Set Point Range | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | For Liquids, gpm | For Gases, scfm | Max. Pressure | Temp. Range, °F | Max. Switching Current @ Voltage | Body Ht. | Environmental Rating | Specifications Met | Each | |
13/16" Probe Lg. | ||||||||||
316 Stainless Steel Body | ||||||||||
One Digital PNP Signal Output | ||||||||||
| 1 1/2" 2" | 0.55 to 54.21 0.97 to 96.37 | 4.84 to 72.47 8.59 to 128.84 | 430 psi @ 70° F | -10° to 200° | 250 mA @ 19 V DC, 250 mA @ 36 V DC | 3 5/16" | IP67, IP69K | 3-A Certified 74-07, C-UL Listed, CE Marked, FDA Compliant 21 CFR 177.2415, UL Listed | 0000000 | 0000000 |
1 13/16" Probe Lg. | ||||||||||
316 Stainless Steel Body | ||||||||||
One Digital PNP Signal Output | ||||||||||
| 1 1/2" 2" | 0.55 to 54.21 0.97 to 96.37 | 4.84 to 72.47 8.59 to 128.84 | 430 psi @ 70° F | -10° to 200° | 250 mA @ 19 V DC, 250 mA @ 36 V DC | 3 5/16" | IP67, IP69K | 3-A Certified 74-07, C-UL Listed, CE Marked, FDA Compliant 21 CFR 177.2415, UL Listed | 0000000 | 000000 |
