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


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.
For technical drawings and 3-D models, click on a part number.
![]() 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 |