Benchtop Autotuning Temperature Controllers
Built into an enclosure, these temperature controllers are protected when sitting on your workbench. Ideal in systems with rapid, unpredictable, or complex temperature changes, they turn heating equipment on and off using a proportional-integral-derivative (PID) control algorithm to make fine adjustments, giving you the most precise and stable temperature control. All work similarly to proportional controllers but gather more variables to calculate the most effective way to return to the target temperature and avoid overshooting it. They also have fuzzy logic to learn your system's behavior and compensate as needed. Use the autotuning function to have the controller cycle and identify the ideal PID variables for your system. These controllers read temperature with a highly sensitive thermocouple probe in critical process applications. Since they reset automatically, they switch off and on again as the temperature fluctuates. Use the keypad to adjust the actuation point, reset point, and other settings.
The controllers have mechanical relay outputs that actuate circuits directly. All are single pole, single throw (SPST-NO) relays and turn one circuit from off to on (normally open).
Controllers with high-limit control let you attach a second thermocouple probe to take the temperature of your heating equipment. If your equipment reaches the high limit, these controllers shut down your heating equipment and won't let it turn back on until you manually reset it, improving the safety of your system.
Controllers with two control zones let you independently turn heating equipment on and off in two separate areas, each with their own thermocouple input and heating control output.
For technical drawings and 3-D models, click on a part number.


Mechanical Relay | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Thermocouple Probe Type | Total No. of Outputs | Output Type | Industry Designation | Max. Switching Current @ Voltage | Reset Type | Input Voltage | NEMA Style | Cord Lg., ft. | Ht. | Wd. | Dp. | Environmental Rating | Each | |
J | 1 | Heating—One Mechanical Relay | SPST-NO | 16 A @ 120 V AC | Automatic | 120V AC | 5-20 | 5 | 5" | 5" | 11" | IP50 | 0000000 | 0000000 |
K | 1 | Heating—One Mechanical Relay | SPST-NO | 16 A @ 120 V AC | Automatic | 120V AC | 5-20 | 5 | 5" | 5" | 11" | IP50 | 00000000 | 000000 |

Mechanical Relay | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Thermocouple Probe Type | Total No. of Outputs | Output Type | Industry Designation | Max. Switching Current @ Voltage | Reset Type | Input Voltage | NEMA Style | Cord Lg., ft. | Ht. | Wd. | Dp. | Environmental Rating | Each | |
J—Heating K—High Limit | 1 | Heating—One Mechanical Relay | SPST-NO | 16 A @ 120 V AC | Automatic, Manual | 120V AC | 5-20 | 5 | 5" | 8 1/2" | 11" | IP50 | 00000000 | 000000000 |
K—Heating K—High Limit | 1 | Heating—One Mechanical Relay | SPST-NO | 16 A @ 120 V AC | Automatic, Manual | 120V AC | 5-20 | 5 | 5" | 8 1/2" | 11" | IP50 | 00000000 | 00000000 |

Mechanical Relay | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Thermocouple Probe Type | Total No. of Outputs | Output Type | Industry Designation | Max. Switching Current @ Voltage | Reset Type | Input Voltage | NEMA Style | Cord Lg., ft. | Ht. | Wd. | Dp. | Environmental Rating | Each | |
J | 2 | Heating—Two Mechanical Relays | SPST-NO | 8 A @ 120 V AC | Automatic | 120V AC | 5-20 | 5 | 5" | 8 1/2" | 11" | IP50 | 00000000 | 000000000 |
K | 2 | Heating—Two Mechanical Relays | SPST-NO | 8 A @ 120 V AC | Automatic | 120V AC | 5-20 | 5 | 5" | 8 1/2" | 11" | IP50 | 00000000 | 00000000 |
On/Off Temperature Controllers for Plug-in Heaters


Switch heaters on or off when your process reaches a certain temperature. Both these controllers and your heater will be powered by the same wall outlet. Place the probe into your process, plug the controller into an outlet, and plug your heater into the socket on the back of the controller’s plug. These simple temperature controllers deliver either full power or no power. They’re best used in systems where temperatures change slowly and you don’t need precise control.
IP20 and NEMA 1 rated controllers are best for indoor use. They keep dirt out and will stop objects about the size of a finger from coming into contact with a live circuit.
IP66 and NEMA 4X rated controllers seal out dirt, corrosive liquids, and water from high-pressure washdowns.
For technical drawings and 3-D models, click on a part number.
Mechanical Relay | Probe | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Temperature Control Range | No. of Outputs | Output Type | Industry Designation | Max. Switching Current @ Voltage | Reset Type | Dia. | Lg. | Cable Lg., ft. | Input Voltage | Ht. | Wd. | Dp. | Each | |
IP20 and NEMA 1—DIN-Rail and Wall Mounting | ||||||||||||||
-40° to 212° F -40° to 100° C | 1 | Heating—One Mechanical Relay | SPDT-NO | 12 A @ 120 V AC | Automatic | 1/4" | 2" | 6 | 120V AC | 5" | 2 7/16" | 2 1/2" | 0000000 | 0000000 |
IP66 and NEMA 4X—Wall Mounting | ||||||||||||||
-40° to 212° F -40° to 100° C | 1 | Heating—One Mechanical Relay | SPDT-NO | 12 A @ 120 V AC | Automatic | 1/4" | 2" | 6 | 120V AC | 6 5/8" | 2 13/16" | 2 13/16" | 0000000 | 000000 |