SI7021-A20-IM1R, Board Mount Humidity Sensors Digital RH ( 3% max) & temperature sensor, industrial grade with cover/filter

Si70xx Relative Humidity & Temperature Sensors Silicon Labs' Si70xx Relative Humidity & Temperature Sensors utilize proven techniques for measuring humidity using polymer dielectric film along with CMOS mixed-signal integrated circuits. These monolithic ICs combine fully calibrated humidity and temperature sensing elements, an I2C interface, and on-chip signal conditioning into a compact, rugged and reliable package.