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Modulating Temperature Control

Phason Fan Speed Control
Modulating Temperature Control - 4821210
Modulating Temperature Control - 4821210
Item #: 4821210
Availability: In Stock - Usually ships in 1 to 2 days.
Price: $249.00


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    The Modulating Temperature Control allows you to automatically control the speed of fans with variable speed motors according to the ambient temperature.

    • When the temperature is at the set point, fans operate at the idle speed setting.
    • When the temperature exceeds the set point, it increases the fan speed.
    • When the temperature increases 6°F above the set point, the fan speed will be at the maximum.
    • When the temperature drops below the set point, the controller shuts off the fans (in shut-off mode), or operates the fans at the idle speed (idle mode).

    Modulating Temperature Control features:

    • Variable speed output
    • Adjustable 40° to 90°F temperature range
    • Temperature differential of 6°F
    • Adjustable minimum idle speed
    • Can handle 10 full load amps @120V
    • One-foot temperature probe, extendable to 500 feet
    • Rugged enclosure (corrosion resistant, water resistant, and fire retardant)
    • For use with any of our variable speed fans


    This control is made to specifically control a single variable speed fan motor. If you have a fan system with motorized intakes and/or multiple fans, they will need their own separate thermostat.


    What is a Differential? The difference between on and off setpoints on a control. For temperature, it is the difference in degrees between the thermostat's on and off setting. If you set a heating thermostat with a 3 degree differential to 71°, it will supply power at any temperature below 71° and cut off at 74° (3 degrees above the setpoint). A cooling thermostat would cut on above 71° and off at 68°.


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