The R1 is a DIN rail mount IoT capable heat trace controller for use in snow melting, freeze protection and temperature maintenance applications. The device can drive up to two contractors to control electric heat trace or hydronic heating systems. In a retrofit configuration, the R1 can activate existing heat trace controllers by mimicking a temperature sensor or a snow sensor. In a retrofit configuration, the existing sensors can be left in place and connected to the R1 temperature sensor and snow sensor inputs.


Control Modes

  • Smart Snow Melting: Uses weather data to activate the heating system, includes optional preheating, the ability to ignore light storms, and dynamic heating after the storm, all to improve overall system performance and reduce energy use and operating cost (For use on snow melting and gutter systems)
  • Snow/ice sensor: Connects to a snow or ice sensor (this mode can be used as an offline back up to smart snow melting)
  • Temperature Sensor: Connects to a thermistor to maintain system temperature (For use on freeze protection and process temperature maintenance systems)
  • Uses an ambient temperature: (local sensor or cloud-based temperature) signal to activate the device (For freeze protection systems)


  • Temperature Sensor Thermistor (2 wire)
  • Snow Sensor (up to 2 sensors)
  • Status and alarms (up to 5 inputs)


  • Temperature Sensor (Pass through)
  • Snow Sensor (Pass through)
  • Relay Driver Circuit (up to two circuits, 1A at 24V)
  • Dry Contact (configurable)


  • WiFi 802.11 Dual Band 2.4GHz & 5GHz
  • Ethernet (RJ45 Plug Cat 5 or 6)
  • Cellular
  • RS485


  • WiFi 802.11 Dual Band 2.4GHz & 5GHz
  • Ethernet (RJ45 Plug Cat 5 or 6)
  • Cellular
  • RS485


  • Indoor rated (NEMA 4X with external enclosure)
  • Operating Temperature -30˚C to 70˚C


  • Download the Frio App for installation instructions


  • Our system is compatible with most ...