SHT21 Humidity and Temp Sensor

Specifications
Energy consumption: 80 uW (at 12 bit, 3V, 1 measurement/s)
Relative Humidity operating range: 0-100% RH
Relative Humidity resolution of 0.03%
Relative Humidity Response Time of 8 sec (tau 63%)
Temperature operating range: -40 to +125°C
Temperature resolution of 0.01 C
4 pins: +5V, GND, Clock (SCL), Data (SDA)
Bidirectional communication over a single pin on I2C protocol
Board is 5V tolerant, allowing sensor to run from a 5V supply on Arduino I/O pins

Applications
Homes, basements and HVAC systems for measuring humidity
People with physical conditions sensitive to humidity
Home ventilating, heating and air conditioning systems
Meteorology stations to predict or check weather temperatures
Gardens or greenhouses to check humidity and temperatures