Recommended for research in aquatic biology and hydrology

An affordable

Measures and transmits temperature and relative humidity data wirelessly to mobile devices or Windows computers via Bluetooth technology

A water level gauge with built-in barometric pressure compensation is the bluetooth equivalent of the U20L: MX2001

timing and duration

HOBO TidbiT MX2204 Temperatur (1500m) Data Logger Recommended for research in aquaticA robust waterproof temperature data logger with bluetooth reading. Well calibrated to be able to deliver accurate temperature measurements directly to the mobile phone or PC via the HOBOconnect app. High durability enables long term use in water depths down to 1500 meters. It also has the ability to detect and record the presence of water, which is very useful for monitoring places where water occurs periodically Documentation