Do you have 3 of these units or 3 sensors connected to 1 station?Remote digital set-up. Works great for me with 3 sensors.
http://www.lacrossetechnology.com/9023/index.php
Thats a great set-up. I have 3 sensors in my cabinet and can put the base unit anywhere in the house. I have an extra sensor (TX21U) I can give you depending on what set you got.I got 3 Hygro's and one incoming. 1 Digital and 2 analog. The one i bought was the wireless hygrometer from LaCrosse