WD Spike

Hi All , I found out the Wh1081 transmitter has No protection diode thus if u manage to insert the batteries wrong you blow the external transmitter unit , im currently looking for a new one for my brother in law

I have had a glitch the last few days on the External Humidity I get a drop for ± 3 Minutes then it goes back to normal it would run at say 80% then suddenly drop to say 11 or 10 % then back to normal , this of course afects the Dew point graph etc. any way of building in a filte that would limit extreme changes in Humidity over a few minutes we all know u could not get a change in 4 minues from 80 to 10 then back again