Relative humidity sensors from Sensirion have become the market standard, since they were launched in 2002. Nowadays the company yearly sells millions of humidity sensors all around the world. The sensor solutions are designed for diverse applications such as data logging, climate control, and antifogging. They hence measure relative humidity and temperature in different kind of products. The digital humidity sensors work with a capacitive measuring principle. Thanks to its unique CMOSens® technology, the humidity sensors allow precise humidity and temperature measurement at low cost.