Honeywell 5821

Wireless Temperature Sensor and Flood Detector

  • Factory New
Brand: Honeywell Part #: 36666 Categories: , Manufacturer Part #: 5821


Ideally suited for applications including bathrooms, laundry rooms and basements, the 5821 helps protect against temperature fluctuations and flood conditions. The versatile device can be configured to operate as a standalone temperature sensor and/or a remote temperature sensor or flood detector. Fully compatible with Resideo Total Connect Remote Services, it can send users email or text message alerts when detecting floods or extreme temperatures so they can take action to minimize and avert damages.


Weight .40 lbs




  • Five selectable temperature ranges to choose from (hot, warm, cold, refrigerate and freeze)
  • Remote Temperature Probe available (T280R) ideal for refrigerator and freezer monitoring
  • Flood detection with FP280 or 470PB External Probe for a wide range of applications; including bathrooms, kitchens, laundry rooms and basements
  • Up to 10 year battery life, which reduces user maintenance
  • Completely wireless, which greatly reduces installation time and maximizes placement options
  • Capable of monitoring cold (45°F) temperature and flood detection simultaneously


5821 Wireless Temperature Sensor and Flood Detector
Honeywell – Data Sheet

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