The air o Swiss one is digital and comes w the humidity reader thingy but I haven't used it yet bc of the soaking thing. But in the manual it says they can be off by +/-5% so if you really want to know you have to buy a separate one.
__________________  The T.U.B. Pack! Toto, Uni, & Bindi
RIP Lord Scrappington Montgomery McLimpybottom aka El Lenguo the Handicapped Ninja 10-12-12 
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