The 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 that leverages the power of Bluetooth to deliver high-accuracy data straight to your mobile device or Windows laptop running Onset's free HOBOconnect app. 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. IMPORTANT INFORMATION Requires a compatible mobile device or Windows computer and the HOBOconnect app. System requirements for the app can be found at the bottom of the HOBOconnect software page. Features Fast temperature-response time (20 seconds) External temperature sensor, plus internal sensor for ambient temp monitoring ±0.2°C (±0.36°F) accuracy Large memory stores 96,000 measurements 3-year battery life (Bluetooth on); 5-year battery life (Bluetooth off) LED indicates when temperature exceeds set threshold Two mounting tabs for use with screws or zip ties ensure secure deployment Convenient wireless setup and download via Bluetooth Works with Onset’s free HOBOconnect app Temperature Sensor Range: Probe: -40 to 100°C (-40 to 212°F), with tip and cable immersion in fresh water up to 50°C (122°F) for one year Logger: -20° to 70°C (-4° to 158°F) in air; -20° to 50°C (-4° to 122°F) in water, maximum sustained temperature in water 30°C (86°F) Accuracy: Probe: ±0.25°C from -40 to 0°C (±0.45 from -40 to 32°F) ±0.2°C from 0 to 70°C (±0.36 from 32 to 158°F) ±0.25°C from 70 to 100°C (±0.45 from 158 to 212°F) Logger: ±0.25°C from -20° to 0°C (±.45°F from -4° to 32°F) ±0.2°C from 0° to 70°C (±0.36°F from 32° to 158°F) Resolution: 0.01°C (0.018°F) Drift: