McMaster-Carr logo
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    11 Products

    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.
    Dial Adjustment
    Image of Product. Front orientation. Temperature Controllers. On/Off Temperature Controllers, Dial Adjustment.
    Controllers with a dial let you change the temperature actuation point with a turn. They fit into panels with 1/16 DIN cutouts.
    Mechanical Relay
    100V AC to 240V AC
    Input Voltage
    Temperature Control
    Range
    For Thermocouple
    Probe Type
    Total No.
    of Outputs
    Output Type
    Switch
    Designation
    Max. Switching Current
    @ Voltage
    Reset
    Type
    Enclosure
    Rating
    Each
    For 1/16 DIN Panel Cutout Size–For 1 3/4" Ht. × 1 3/4" Wd. Panel Cutout
    32° F to 1,110° F
    0° C to 600° C
    K
    1Heating—1 Mechanical RelaySPDT
    3 amp @ 250V ACAutomaticIP40
    5844N210000000
    32° F to 2,190° F
    0° C to 1,200° C
    K
    1Heating—1 Mechanical RelaySPDT
    3 amp @ 250V ACAutomaticIP40
    5844N22000000
     
    Accessories for Temperature Controllers
    Keypad Adjustment
    Image of Product. Front orientation. Temperature Controllers. On/Off Temperature Controllers, Keypad Adjustment.
    Controllers with a keypad let you quickly adjust the temperature actuation point, reset point, and other settings.
    IP64 Enclosure Rating—IP64 rated controllers protect against dust and splashing water.
    Mechanical Relay
    120V AC Input
    Voltage
    240V AC Input
    Voltage
    Temperature Control
    Range
    For Thermocouple
    Probe Type
    Total No.
    of Outputs
    Output Type
    Switch
    Designation
    Max. Switching Current
    @ Voltage
    Reset
    Type
    Enclosure
    Rating
    Each
    Each
    For 1 1/8" Ht. × 2 13/16" Wd. Panel Cutout
    32° F to 990° FJ, K, S
    1Heating—1 Mechanical RelaySPDT
    16 amp @ 240V ACAutomaticIP64
    5844N1100000005844N120000000
     

    Proportional Temperature Controllers

    Image of Product. Front orientation. Temperature Controllers. 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.
    Mechanical Relay Output
    Mechanical Relay
    Temp. Control
    Range, ° F
    For Thermocouple
    Probe Type
    Total No.
    of Outputs
    Output Type
    Switch
    Designation
    Max. Switching Current
    @ Voltage
    For Probe
    Type
    Reset
    Type
    Input Voltage
    Range, V AC
    Ht.
    Wd.
    Dp.
    Features
    Each
    For 1/16 DIN Panel Cutout Size–For 1 3/4" Ht. × 1 3/4" Wd. Panel Cutout
    35 to 390K
    1Heating—1 Mechanical RelaySPDT
    3 amp @ 250V ACThermocoupleAutomatic100 to 2402 1/4"1 7/8"3 3/4"LED Status Indicator5914N130000000
    35 to 750K
    1Heating—1 Mechanical RelaySPDT
    3 amp @ 250V ACThermocoupleAutomatic100 to 2402 1/4"1 7/8"3 3/4"LED Status Indicator5914N14000000
    35 to 2,190K
    1Heating—1 Mechanical RelaySPDT
    3 amp @ 250V ACThermocoupleAutomatic100 to 2402 1/4"1 7/8"3 3/4"LED Status Indicator5914N15000000
    50 to 850J
    1Heating—1 Mechanical RelaySPDT
    5 amp @ 240V ACThermocoupleAutomatic200 to 2401 7/8"1 7/8"3 3/4"LED Status Indicator5914N11000000
     
    Accessories for Temperature Controllers
    back to top