The Snow Detector & Melting Control 665 is designed to operate
mechanical equipment to melt snow off an outdoor slab. It can be used in
hydronic or electric snow melting applications. This product uses a
tekmar snow/ice detection sensor in order to automatically melt snow
using Pulse Width Modulation (PWM) and slab Outdoor Reset to maintain
slab temperature. It is capable of controlling a single boiler, a system
pump, and providing a signal when melting is enabled.