Environmental data loggers are waterproof

KESTREL Drop Wireless Environmental Data Loggers are small, rugged, waterproof and accurate, measuring temperature, humidity, heat index, dew point temperature, station pressure, density altitude & pressure trend. Units allow users to record and monitor the conditions of any environment, while easily accessing and charting real-time data on a smart device. Units can be placed in multiple locations (inside, outside and even in water) to log specific conditions and transmit data via Bluetooth. Also available in red or blue. http://www.itm.com