The HTU21D Humidity and Temperature sensor uses patented MEAS technology. This combination sensor is housed in a miniature 3 mm x 3 mm x 0.09 mm DFN package. It has a typical accuracy of ±2% and features an I²C Digital Interface. The sensor range is 0 to 100% RH over a temperature range of -40 to +125°C. It has selectable resolution for relative humidity and temperature and features low sleep and operating current requirements.