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  • Single Stage ETC Temperature Control w/ 8' Sensor, 120/240V Input Product Image
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    Single Stage ETC Temperature Control w/ 8' Sensor, 120/240V Input ETC-111000-000 Single Stage ETC Temperature Control w/ 8' Sensor, 120/240V Input
    SKU: ETC-111000-000
    Brand: Ranco
    (116)
    $51.10 each
    702
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  • Single Stage, NEMA 1 Digital Temp Control (120/240VAC SPDT) Product Image
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    Single Stage, NEMA 1 Digital Temp Control (120/240VAC SPDT) A421ABC-02C Single Stage, NEMA 1 Digital Temp Control (120/240VAC SPDT)
    SKU: A421ABC-02C
    Brand: Johnson Controls
    (22)
    $61.95 each
    141
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  • Single Stage Temperature Control w/ Sensor (24V Input) Product Image
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    Single Stage Temperature Control w/ Sensor (24V Input) ETC-112000-000 Single Stage Temperature Control w/ Sensor (24V Input)
    SKU: ETC-112000-000
    Brand: Ranco
    (17)
    $62.74 each
    200
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  • Single Stage Temp Control w/ 8' Capillary (SPDT) Product Image
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    Single Stage Temp Control w/ 8' Capillary (SPDT) A19ABC-24C Single Stage Temp Control w/ 8' Capillary (SPDT)
    SKU: A19ABC-24C
    Brand: Johnson Controls
    (10)
    $58.88 each
    90
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  • Single Stage Digital Temperature Control (24V, SPDT) Product Image
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    Single Stage Digital Temperature Control (24V, SPDT) A421GBF-02C Single Stage Digital Temperature Control (24V, SPDT)
    SKU: A421GBF-02C
    Brand: Johnson Controls
    (4)
    $63.68 each
    78
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  • Refrigeration Temp Ctrl.<br>w/ 5' Capillary<br>(-30&#176;F to 90&#176;F) Product Image
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    Refrigeration Temp Ctrl. w/ 5' Capillary (-30°F to 90°F) 1609-101 Refrigeration Temp Ctrl. w/ 5' Capillary (-30°F to 90°F)
    SKU: 1609-101
    Brand: White Rodgers
    (9)
    $49.35 each
    127
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  • Remote Bulb Temp Ctrl Cooling Only<br>(-30&#176;F to 100&#176;F)<br> Product Image
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    Remote Bulb Temp Ctrl Cooling Only (-30°F to 100°F) A19ABA-40C Remote Bulb Temp Ctrl Cooling Only (-30°F to 100°F)
    SKU: A19ABA-40C
    Brand: Johnson Controls
    (7)
    $53.24 each
    200
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  • Temperature Sensor<br>for Ranco Control Product Image
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    Temperature Sensor for Ranco Control 1309007-044 Temperature Sensor for Ranco Control
    SKU: 1309007-044
    Brand: Ranco
    (8)
    $15.40 each
    54
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  • Electronic<br>Temperature Controller<br>(24/120/208/240 Volts AC) Product Image
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    Electronic Temperature Controller (24/120/208/240 Volts AC) 16E09-101 Electronic Temperature Controller (24/120/208/240 Volts AC)
    SKU: 16E09-101
    Brand: White Rodgers
    (5)
    $61.00 each
    15
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  • 2-Stage Temperature Control w/ Sensor (120/240V Input) Product Image
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    2-Stage Temperature Control w/ Sensor (120/240V Input) ETC-211000-000 2-Stage Temperature Control w/ Sensor (120/240V Input)
    SKU: ETC-211000-000
    Brand: Ranco
    (12)
    $94.19 each
    34
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  • 1097 Ohm Standard Temperature Sensor Product Image
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    1097 Ohm Standard Temperature Sensor 50021579-001 1097 Ohm Standard Temperature Sensor
    SKU: 50021579-001
    Brand: Honeywell
    $41.73 each
    60
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  • Temperature Control<br>1 Input, 1 SPDT Relay<br>1 Sensor Included Product Image
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    Temperature Control 1 Input, 1 SPDT Relay 1 Sensor Included T775A2009 Temperature Control 1 Input, 1 SPDT Relay 1 Sensor Included
    SKU: T775A2009
    Brand: Honeywell
    (7)
    $131.95 each
    44
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  • Temperature Control<br>2 Inputs, 2 SPDT Relays<br>1 Sensor Product Image
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    Temperature Control 2 Inputs, 2 SPDT Relays 1 Sensor T775B2032 Temperature Control 2 Inputs, 2 SPDT Relays 1 Sensor
    SKU: T775B2032
    Brand: Honeywell
    (5)
    $206.70 each
    28
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  • Temperature Control (-30&#176; to 100&#176;F) Product Image
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    Temperature Control (-30° to 100°F) A19BBC-2C Temperature Control (-30° to 100°F)
    SKU: A19BBC-2C
    Brand: Johnson Controls
    (4)
    $96.75 each
    87
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  • Replacement PTC Sensor<br>with 6-1/2' (2 m) Leads Product Image
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    Replacement PTC Sensor with 6-1/2' (2 m) Leads A99BB-200C Replacement PTC Sensor with 6-1/2' (2 m) Leads
    SKU: A99BB-200C
    Brand: Johnson Controls
    (6)
    $29.92 each
    62
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  • Cut-In Control (41&#176;F) Product Image
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    Cut-In Control (41°F) A12-701 Cut-In Control (41°F)
    SKU: A12-701
    Brand: Ranco
    (4)
    $47.08 each
    24
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  • Temperature Control (100&#176;-240&#176;F) Product Image
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    Temperature Control (100°-240°F) A19DAC-1C Temperature Control (100°-240°F)
    SKU: A19DAC-1C
    Brand: Johnson Controls
    (3)
    $71.22 each
    55
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  • Remote Bulb Refrigeration Temperature Controller (-30&#176;F to 90&#176;F, 8' Cap) Product Image
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    Remote Bulb Refrigeration Temperature Controller (-30°F to 90°F, 8' Cap) T6031A1029 Remote Bulb Refrigeration Temperature Controller (-30°F to 90°F, 8' Cap)
    SKU: T6031A1029
    Brand: Honeywell
    (1)
    $61.95 each
    33
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  • Temperature Control<br>2 Inputs, 4 SPDT Relays<br>1 Sensor Product Image
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    Temperature Control 2 Inputs, 4 SPDT Relays 1 Sensor T775B2040 Temperature Control 2 Inputs, 4 SPDT Relays 1 Sensor
    SKU: T775B2040
    Brand: Honeywell
    (7)
    $280.17 each
    37
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    358
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  • Remote Bulb Refrigeration Temperature Controller (-30&#176;F to 90&#176;F, 8' Cap) Product Image
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    Remote Bulb Refrigeration Temperature Controller (-30°F to 90°F, 8' Cap) T6031A1136 Remote Bulb Refrigeration Temperature Controller (-30°F to 90°F, 8' Cap)
    SKU: T6031A1136
    Brand: Honeywell
    (6)
    $64.63 each
    35
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  • 1-Stage ETC Temp. Control w/ Sensor (120/240V Input) Plastic Enclosure Product Image
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    1-Stage ETC Temp. Control w/ Sensor (120/240V Input) Plastic Enclosure ETC-141000-000 1-Stage ETC Temp. Control w/ Sensor (120/240V Input) Plastic Enclosure
    SKU: ETC-141000-000
    Brand: Ranco
    (4)
    $85.95 each
    95
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  • Temperature Control<br>2 Inputs, 2 Analog Outputs <br>1 Sensor Included Product Image
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    Temperature Control 2 Inputs, 2 Analog Outputs 1 Sensor Included T775M2006 Temperature Control 2 Inputs, 2 Analog Outputs 1 Sensor Included
    SKU: T775M2006
    Brand: Honeywell
    (2)
    $157.64 each
    65
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  • Two Stage Temperature Control w/ Sensor (24V Input) Product Image
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    Two Stage Temperature Control w/ Sensor (24V Input) ETC-212000-000 Two Stage Temperature Control w/ Sensor (24V Input)
    SKU: ETC-212000-000
    Brand: Ranco
    (8)
    $92.64 each
    74
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  • Temperature Control<br>2 Inputs, 2 SPDT, 2 Analog Outputs, 1 Sensor Product Image
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    Temperature Control 2 Inputs, 2 SPDT, 2 Analog Outputs, 1 Sensor T775M2048 Temperature Control 2 Inputs, 2 SPDT, 2 Analog Outputs, 1 Sensor
    SKU: T775M2048
    Brand: Honeywell
    (3)
    $261.98 each
    28
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FAQs, Manuals & Videos

Resources

Articles

  • Temperature controllers are used to regulate temperatures without extensive operator involvement. Temperature controllers can be used in a wide range of applications. Certain features should be considered before selecting a temperature controller, with the most important being the controller's temperature range. Other factors that should be considered are the application type, input sensor type, number of outputs, and the type of outputs.

    Pneumatic temperature controllers regulate air and liquid temperatures. They are designed for heating and cooling unit ventilators and fan coil units. Pneumatic temperature controllers operate in three phases. First, the pneumatic temperature controller senses the temperature being monitored. It then attempts to balance its internal lever system. Finally it adjusts its pilot pressure to counterbalance the main lever force. A pneumatic temperature controller can have direct action or reverse action. In a direct acting pneumatic controller, the output signal rises as the temperature rises. The opposite is true for a reverse acting pneumatic temperature controller. Both provide proportional control of pneumatic valves and damper actuators in heating and air conditioning systems. Direct acting and reverse acting controllers are available in one pipe or two pipe configurations. A one pipe configuration is used in low air capacity applications, while a two pipe configuration is used in high air capacity applications. Two pipe controllers are the more popular option on our website.

    Modulating temperature controllers are used to adjust water control or air temperature in ducts, tanks, and similar applications. These controllers should be selected based on the features the application requires. Models with a copper fast response element provide a response time four times faster than standard models. Modulating temperature controllers can have an analog or relay output type.

    Return-air temperature controllers are used to maintain a constant ambient temperature in farm, industrial, or commercial applications. These controls regulate temperature in ventilation, heating, or cooling systems by adjusting the temperature of the air supplied by individual cooling units. A return-air temperature controller regulates the temperature on the supply side of an air handler. This allows a facility to control and supply predictable temperatures, thereby reducing operating costs.

    Ambistat temperature controllers are used for HVAC, agricultural, and industrial applications. An ambistat temperature control regulates a wide temperature range and can be used in many applications. Common applications for these controls are beverage dispensing machines, ice cube machines, bulk milk tanks, dishwashers, crop drying, tobacco curing, and similar applications.

    Electronic temperature controls are the next generation of commercial and agricultural temperature controls. These versatile controls are economical, programmable, and simple to install. A sequencer model and a universal input model are the two unique models available. The sequencer model eliminates the need for a separate time delay device. It uses a time clock scheduler/digital input to control setback and disables output to save energy. It also controls floating actuators with floating outputs. The universal input model can control pressure, humidity, or any variable analog input. A special boiler model is available for boiler control. The staged sequencing model is the best option for applications that require relays to be staged in sequence.

    We carry a wide selection of Honeywell, Ranco, and White Rodgers temperature controllers for residential or commercial applications.

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