Quote Originally Posted by DreadedHermie
Dunno if this is any help, but my little Milwaukee meter seems to remember the last thing I had it stuck in, to an extent. It seems like the probes may have an absorbent element of some kind. And Disrupt's right, .2 isn't much--I never trust a meter blindly in case it suddenly goes out of whack. I kinda plan for accuracy no better than +-.2, I guess. :hippy:

Hermie
whats happening when u get the exact same constant readings is your getting scale build up.all the stuff in your water will slowy start to scale over the glass lense and after it has dried it sticks,sooooooo the next time u go to check ph it gets wet and gives u inacurate readings.this is why it is a verry good idea to run hot water over your meter after every use. personally i use 2 methodes every time i test ph.my hanna and these ph paper strips i take from my work.i honestly think im just going to toss my digital meter cuz paper just doesnt lie "unless its a police report"