HYT 271 is a new digital humidity element with an I²C interface, allowing communication with up to 126 sensors at one time.  These durable sensors come in a 1.8% rH accuracy with a fast response time of less than 4 seconds.  A temperature output is also included.  This new humidity sensor has a humidity resolution of 0.02% FS and an optional low operating power supply of 1.8 to 3.6V. 

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