Hi guys,
Believe it or not, I bought a 2nd/3rd/maybe more Hanna pH test pen from the flea market along Kelantan Lane at a price of.....
*DRUMROLL*
$3 bucks!!!!!!!!!! ($4.50 with batteries)
Yah well anyway I suspect it's seriously screwed, but it does give a reading.. only the reading isn't exactly constant esp after I dip in in saltwater then freshwater and back...
I know one of the dials at the back tunes it, so I just get pH 7.0 calibrating solution, dip it in and turn it..
But what does the other button do?
Also if I someone can tell me the instructions on how to use it I would be very grateful..
Thanks...