On/Off Temperature Controllers
The simplest temperature controllers—they turn devices fully on or off, with no middle state, at a given temperature. They’re best as alarms and for systems where temperature changes slowly, but they shouldn’t be used when precise temperature control is necessary. All automatically reset as the temperature fluctuates. To read the temperature, they use a highly sensitive thermocouple probe (not included). And their mechanical relay actuates circuits directly. Controllers are SPDT (single pole, double throw) and can turn one circuit from off to on (normally open) or on to off (normally closed). Mount them into cutouts in instrument panels.
All meet American, Canadian, and European safety standards.
Controllers with a dial let you change the temperature actuation point with a turn. They fit into panels with 1/16 DIN cutouts. To mount them to a surface or DIN rail, add DIN-rail/surface-mount adapters. To convert larger cutouts to fit these controllers, use DIN cutout adapters.
Controllers with a keypad let you quickly adjust the temperature actuation point, reset point, and other settings.
IP64 rated controllers protect against dust and splashing water.
For technical drawings and 3-D models, click on a part number.
Mechanical Relay | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Temperature Control Range | For Thermocouple Probe Type | Total No. of Outputs | Output Type | Industry Designation | Maximum Switching Current @ Voltage | Reset Type | Input Voltage Range  | Environmental Rating | Each | |
1/16 DIN—For 1 3/4" Ht. × 1 3/4" Wd. Panel Cutout | ||||||||||
| 32° to 1,110° F 0° to 600° C | K | 1 | Heating—One Mechanical Relay | SPDT | 3 A @ 250 V AC | Automatic | 100V AC to 240V AC | IP40 | 0000000 | 0000000 |
| 32° to 2,190° F 0° to 1,200° C | K | 1 | Heating—One Mechanical Relay | SPDT | 3 A @ 250 V AC | Automatic | 100V AC to 240V AC | IP40 | 0000000 | 000000 |
Mechanical Relay | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Temperature Control Range, °F | For Thermocouple Probe Type | Total No. of Outputs | Output Type | Industry Designation | Maximum Switching Current @ Voltage | Reset Type | Environmental Rating | Each | |
120V AC Input Voltage | |||||||||
For 1 1/8" Ht. × 2 13/16" Wd. Panel Cutout | |||||||||
| 32° to 990° | J, K, S | 1 | Heating—One Mechanical Relay | SPDT | 16 A @ 240 V AC | Automatic | IP64 | 0000000 | 0000000 |
240V AC Input Voltage | |||||||||
For 1 1/8" Ht. × 2 13/16" Wd. Panel Cutout | |||||||||
| 32° to 990° | J, K, S | 1 | Heating—One Mechanical Relay | SPDT | 16 A @ 240 V AC | Automatic | IP64 | 0000000 | 000000 |
Mounting | ||||
|---|---|---|---|---|
| Fasteners Included | Screw Size | No. of Holes | Each | |
| No | No. 6 | 2 | 000000000 | 000000 |
Proportional Temperature Controllers
Cycle heaters on and off intermittently to maintain a set temperature in your system. These proportional controllers keep your heater on when your system is below the set temperature, and they turn it off in short cycles when your system nears the set temperature. The short cycles make them more precise and allow less temperature fluctuation than on/off controllers. Use them on electric heaters only—they don't work with valves or solenoids.
Turn the dial on these controllers to choose your set temperature. They use a highly sensitive thermocouple probe (not included) to read temperature. Their mechanical relay actuates circuits directly. All are SPDT (single pole, double throw) and can turn one circuit from off to on (normally open) or on to off (normally closed). Install these controllers into instrument panels with DIN cutouts.
All controllers meet American, Canadian, and European safety standards.
To mount 1/16 DIN controllers to a surface or DIN rail, add DIN-rail/surface-mount adapters. To convert larger cutouts to fit 1/16 DIN controllers, add DIN cutout adapters.
Mechanical Relay | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Temperature Control Range, °F | For Thermocouple Probe Type | Total No. of Outputs | Output Type | Industry Designation | Maximum Switching Current @ Voltage | Reset Type | Input Voltage | Each | |
1/16 DIN—For 1 3/4" Ht. × 1 3/4" Wd. Panel Cutout | |||||||||
| 35° to 390° | K | 1 | Heating—One Mechanical Relay | SPDT | 3 A @ 250 V AC | Automatic | 100V AC to 240V AC | 0000000 | 0000000 |
| 35° to 750° | K | 1 | Heating—One Mechanical Relay | SPDT | 3 A @ 250 V AC | Automatic | 100V AC to 240V AC | 0000000 | 000000 |
| 35° to 2,190° | K | 1 | Heating—One Mechanical Relay | SPDT | 3 A @ 250 V AC | Automatic | 100V AC to 240V AC | 0000000 | 000000 |
| 50° to 850° | J | 1 | Heating—One Mechanical Relay | SPDT | 5 A @ 240 V AC | Automatic | 200V AC to 240V AC | 0000000 | 000000 |
1/4 DIN—For 3 5/8" Ht. × 3 5/8" Wd. Panel Cutout | |||||||||
| 50° to 850° | J | 1 | Heating—One Mechanical Relay | SPDT | 5 A @ 240 V AC | Automatic | 90V AC to 264V AC | 0000000 | 000000 |
Mounting | ||||
|---|---|---|---|---|
| Fasteners Included | Screw Size | Number of Holes | Each | |
| No | No. 6 | 2 | 000000000 | 000000 |
