Digital Fridge or Freezer Alarm Thermometer (RT801)
https://www.thermoworks.com/rt801/
WebThe RT801 is a great low-cost fridge/freezer thermometer. Perfect for monitoring refrigerators, freezers, coolers, chillers and all other types of cold storage systems. It's also great for aquariums, terrariums, incubators, and hundreds of other uses wherever you want to make sure an acceptable temperature range is maintained.
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