Radiant heat info
  • Warmzone offers up-to-date information about top quality radiant floor heating and snow melting solutions.
Radiant heat services corner image.
  • Warmzone provides professional system design and engineering services.
Process corner spacer
  • Warmzone directs you to what products will work best for your needs.

Aerial-Mount Snow Sensor for Snow Melting Systems


Aerial mounted snow sensor for radiant snow melting system. Radiant heated driveway systems are being installed in residential and commercial properties at increasing rates as home and business owners discover the affordability and benefits of automated snowmelt systems. Energy-efficient, maintenance free and remarkably effective, radiant heated driveway systems and snowmelt solutions offered by Warmzone are nearing performance perfection.


Warmzone's WS-2C snow sensor features recent enhancements that installers have come to love. The new features include:


Universal Power Supply - The universal power supply allows the sensor to auto select the input voltage.


Redesigned Case - The redesigned case prevents over tightening of the screws.


Sensitivity Control - You can now fine tune (program) the sensor for specific conditions. By adjusting the moisture control sensitivity you greatly reduce false trips.

About the Sensor

The interleaved grid on the top of the aerial sensor is the precipitation or "moisture" sensor. The brass cylinder protruding from the bottom of the enclosure is the temperature sensor. For reliable rain and snow detection the unit must be mounted in a location that exposes the moisture sensor to a clear view of the sky. DO NOT mount the unit directly under eaves or so close to the ground that it may become buried in snow. For proper temperature detection the WS-2C must be mounted outdoors, away from furnace vents, dryer vents, and other sources of heat. (When powered, the WS-2C moisture grid always remains warm. This is normal, and allows the sensor to continuously melt snow and evaporate precipitation from the grid.

Additional Snow Sensor Features


Easy to Install - The snow sensor is compact, sturdy and easy to install. The unit is mounted by attaching the 3/4-inch mounting hub at the bottom of the enclosure to a rigid metal 3/4-inch by 10-inch (approximately) conduit nipple to a weatherproof two-gang metal junction box with 3/4-inch hubs (at least 1 hub in and 1 hub out). The sensor also features four mounting tabs, so if you choose, you can mount the snow sensor to a post. (Make sure the post is elevated above the highest level of expected snow fall.)


Terminate your wiring to the pre-installed pigtails on the WS-2 in a metal weatherproof two-gang junction box. The WS-2C is housed in a PVC enclosure with dimensions of 4.75 x 7 x 2.75-inches. The WS-2C weighs just 2 pounds, so the snow sensor can be easily secured and supported.


While all of the operational switches and set points have been pre-set at Warmzone (with the notable exception of the voltage jumpers), the user may access all electronics by unscrewing the four Phillips head screws and removing the front cover.


Automatic Activation - Warmzone's aerial-mount snow sensor system is designed to detect temperature and precipitation. When moisture is present and the temperature reaches the preset temperature (usually set at 39°F.), it signals the master controller, activating the radiant heated driveway / snow melting system. It automatically shuts off afterwards, resulting in energy-efficiency and low operating costs.


Adjustable Temperature Set Point - You can adjust the set temperature in which the snow melting sensor activates the system. This is known as the trigger temperature (TT). Using the TEMP ADJUST control, you can set the temperature anywhere from 34° to 44°F. When ambient air temperature is below this trigger point and the sensor detects precipitation, the moisture detected is assumed to be snow or freezing rain. When the temperature is above the trigger point, precipitation is assumed to be rain.

Smart System Compatible - The snow sensor can be connected to a compatible smart system. By purchasing the optional CS-1 cable you will be able to turn your system on and off via telephone from remote locations.


Upgradeable Remote Activation - You can monitor and control your ClearZone snow melting system from inside your home. The remote control panel is mounted on a 1.75 x 19-inch standard rack mount panel and can be installed anywhere in your home. (The panels have a range of up to 1200 feet.) The snowmelt control panel provides basic DEICE ON status for the deicing system, along with MANUAL ON, AUTOMATIC, and STANDBY control capabilities.

Adjustable Delay Off Cycle - The "Delay Off" function refers to the sensor's drying cycle timer. The timer allows the snowmelt system to dry the heated surface through evaporation after the precipitation has stopped. This reduces the chance of melted snow/ice from refreezing into ice by completely drying the surface. The timer restarts each time the sensor detects precipitation, so the snow sensor will continue to operate as long as precipitation is detected and then for the Delay Off period after the precipitation has stopped. A minimum 2-minute closure to reduce cycling of an external controller or feed blower is provided in all the "sensor" modes. When in "Controller" mode, the Delay Off time can be adjusted from 30 to 90 minutes by using the DELAY ADJUST control.


Full 30A @ 240VAC Control - The peak power consumption of Warmzone's aerial snow sensor is 15 watts, and it can be powered from a 100-120 VAC or 200-240 VAC 50/60Hz source. The voltage selection is performed by installing the jumpers provided onto the printed circuit board. The sensor provides a single 240 VAC @ 30A normally open load contact set. This contact set is paralleled with a low power contact set to provide remote activation monitoring. Operational temperature range is -40vC to +85vC.

Selectable Low Temperature Cutoff - The snow sensor features a Low Temperature Cutoff (LTC) option, which prevents the sensor from triggering if precipitation is detected below a certain temperature. However, if the radiant heating system has been activated while precipitation continues and the ambient temperature drops below the set temperature, the LTC will be ignored. This way, any water that is left behind on the surface during the heating cycle is prevented from refreezing into ice as a result of deactivating the deicing system.

Replaceable Precipitation Sensor - To ensure the best performance from your Warmzone snow melting system, it is recommended that the snow sensor be powered down and the grid wiped clean with clear water at least once every four months. Scotch-Brite works well to remove heavy deposits.



Warmzone has a growing network of contractors across the country with experience installing radiant floor heating systems as well as snow melting systems and roof deicing solutions. We are ready and willing to work with you, so take the first step and contact Warmzone today. Email us, or call us toll free at 888.488.9276 for more information.