Tekmar Snow Detector & Melting Control 665 – Pulse Width Modulation


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.

SKU: 665 Category: Tags: ,

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.


  • Automatic snow detection and melt control (with 090 Sensor)
  • CSA C US certified (approved to applicable UL standards)
  • Cold Weather Cut Out
  • Equipment Exercising
  • Manual Override
  • Remote display and adjustment capabilities
  • Slab Outdoor Reset
  • Temporary Idle
  • Test sequence to ensure proper component operation
  • Warm Weather Shut Down


665 Installation & Operation

665 Submittal

665 User Manual

665 Applications

Product Website


Control Microprocessor control. This is not a safety (limit) control
Packaged weight 3.1 lb. (1400 g)
Dimensions 6-5/8″ H x 7-9/16″ W x 2-13/16″ D (170 x 193 x 72 mm)
Enclosure Blue PVC plastic, NEMA type 1
Approvals CSA C US, meets class B: ICES & FCC Part 15
Ambient conditions Indoor use only, 32 to 122°F (0 to 50°C), RH ≤90% Non-condensing
Power supply 115 V (ac) ±10%, 50/60 Hz, 600 VA
Relay capacity 230 V (ac) 5 A, 1/3 hp
Demand 20 to 260 V (ac) 2 VA
Sensors NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
-Included Outdoor Sensor 070
-Optional tekmar type #: 039040072073090091094
Warranty Limited 3 Year Warranty
Weight 1.4 kg


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