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Rest easy, knowing the WatchDog Cellular Frost Alert will call you...
... in case of frost!
... if your heater fails!
... from miles away!

LCD display (current temperature, signal strength, etc.)
Key pad for user set up: temperature threshold, system test operation
Relay terminal connections to control an external device
6 ft external temperature sensor
NEMA 4 (IP66) enclosure

WatchDog Cellular Frost Alert Pro - Item 3451

  • GSM cellular module included (user provides SIM card and service plan — Pay-As-You-Go recommended)
  • Makes voice call or sends text message (or both)
  • Requires 6-volt lantern battery (not included)

WatchDog Cellular Frost Alert - Item 3450

  • Requires user-provided basic cell phone (flip phone or flat phone; not a touch-screen Smart Phone)
  • Presses the phone buttons to make a voice call
  • Uses 4-AA batteries (not included) to power the electronic controls and display (but not your cell phone)
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Manufacturer Info
Spectrum Technologies