Sensirion AG, Staefa, Switzerland, offers SHT21 humidity sensors. The digital humidity sensor features long-term stability, full calibration, a digital interface, and support for additional communication modes including analog modes. QFN components are resin encapsulated to minimize the sensor dimensions. The sensor is 3 by 3 by 1.1 mm and can be processed in a reflow oven.
Digital Humidity Sensors from Sensirion