The Snow Switch Model PD Pro is an automatic
snow and ice melting control system.
Utilizing standard Environmental Technology
snow and ice sensors (sold separately),
applications include snow and ice detection
and melting for pavement, sidewalks, loading
docks, roofs, gutters and downspouts in commercial
and residential environments.
The PD Pro interfaces with up to two standard
Environmental Technology sensors to meet
site requirements. The CIT-1, GIT-1, and
SIT-6E sensors reliably detect snow and ice
melting in gutter and pavement applications.
The CIT-1 aerial snow sensor detects falling or
blowing precipitation before snow or ice begin
to form, allowing the control to begin managing
the system. The CIT-1 sensor may be roof
or mast mounted and can be paired with the
GIT-1 sensor for gutter applications or the
SIT-6E sensor for pavement applications. All
three sensors detect precipitation as snow
at temperatures below 38°F (3.3°C). The PD
Pro is signaled only if moisture occurs below
this temperature, saving energy and ensuring
thorough snow and ice melting. Since 1968,
these sensors have been the industry’s most
versatile and cost-effective automatic snow
melting control sensors.
The PD Pro features automatic and manual override
operator controls. The adjustable
Hold-On timer continues heater operations
up to 8 hours after snow or ice conditions
end to ensure complete melting. The Heater
Cycle control button allows manual initiation
or cancelation of a heating cycle. The optional
RCU-3 remote control unit can be located for
convenient monitoring and control. These
flexible control options provide complete
snow melting and water evaporation at a low
The PD Pro weighs only 3 pounds and measures
5-1/2” (L) x 8-1/8” (W) x 4-3/8” (H).
Comprehensive instruction manuals simplify
installation and operation. These products are
also supported by Environmental Technology
The PD Pro is a capable snow and ice control
for medium-sized applications whose features
and power requirements do not require an
APS or EUR Series control panel.