Powered by 2 AA alkaline batteries, TR-71wf/72wf Series Wireless Temperature and Humidity Data Loggers are equipped with auto communication function, which automatically uploads all recorded data from loggers over wireless LAN to cloud service, enabling users to view data on mobile device or PC. Units use external sensors to record on 2 channels in either °C or °F. Temperature logger measures from -40 to 230°F, while combination logger measures from 32–131°F and 10–95% RH.
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