The Sensirion 4th generation digital relative humidity and temperature sensor is a digital platform for measuring relative humidity and temperature at different accuracy classes. The I2C interface provides several preconfigured I2C addresses and maintains an ultra-low-power budget. The power-trimmed internal heater can be used at three heating levels, thus enabling sensor operation in demanding environments. The four-pin dual-flat-no-leads package is suitable for surface mount technology (SMT) processing.

Relative humidity accuracy up to ±1.5 %RH
Temperature accuracy up to ±0.1 °C
Average current 0.4 μA
Idle current 80 nA
I2C fast mode plus, CRC checksum
Operating range 0-100 %RH, -40…125 °C
Fully functional in a condensing environment
Variable power heater
NIST traceability