Sling psychrometer should do it. You need to find some music with a clear beat and dance with it to really get the best accuracy.

Wayne

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Monday, December 19, 2016 9:06 AM
To: [log in to unmask]
Subject: [TN] portable humidity meter

Gurus,
can anyone suggest a portable humidity meter capable of range 20-90 %RH, with reasonable accuracy?  Many thanks in advance.
Regards,
              joyce