Environmental laboratory
New generation of digital humidity sensors
Jun 08 2009
Sensirion (Switzerland) is launching its new generation of humidity and temperature sensors at Sensor+Test 2009. The SHT21 conforms to the current trend of saving space and reducing energy consumption.
The new humidity sensor incorporates the existing strengths of the successful SHT11 while significantly enhancing and improving them. For instance, the SHT21 sensor not only features long-term stability, full calibration and a digital interface, but also supports additional communication modes, including analog modes. In addition, sensor reliability and performance have been boosted by using advanced semiconductor technology. The QFN components are resin encapsulated to minimize the sensor dimensions. With a 3 x 3-mm footprint and a height of 1.1 mm, the sensor fulfills practical every wish with regard to the compactness of integrated sensors. Encapsulation of the semiconductor chip also provides reliable protection against ambient conditions and thus increases the stability of the sensor.Like the sensors in the SHT1x series, the SHT21 can be processed in a reflow oven. It is correspondingly suitable for use in mass production.
To meet the demands of complex applications, the manufacturing concept has been significantly improved with regard to test routines. Numerous innovations have also been introduced to further improve quality insurance.
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