Onset HOBO TidbiT MX External Temp Logger

The Onset HOBO TidbiT MX2205 is a waterproof data logger with both an internal sensor and an external sensor that’s designed for monitoring fast-changing temperatures.


  • External temperature sensor, plus internal sensor for ambient temp monitoring
  • 3-year battery life (Bluetooth on); 5-year battery life (Bluetooth off)
  • Works with Onset’s free HOBOconnect app

The Onset HOBO TidbiT MX2205 is ideal for monitoring shallow waters, like streams and wetlands, or for monitoring soil in fields that are prone to flooding. Equipped with both an internal sensor to monitor ambient temperature and an external sensor on a 2m cable to accurately monitor fast-changing temperatures, the HOBO TidbiT Mx2205 is a low-cost, easy-to-use, waterproof logger.

This rugged logger withstands harsh environments and can be deployed just above water or soil for quicker, more convenient data downloads that don’t require pulling up the logger. Bluetooth capability delivers high-accuracy data straight to any designated mobile device or Windows laptop running Onset's free HOBOconnect app.

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Onset HOBO TidbiT MX External Temp Logger
HOBO TidbiT MX external temperature logger, 2m cable
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