I've had this ph reader since 2009. I know toss it an get a new one. Well like most, funfs wont allow a new for a while. Here is the problem. I can calibrate it on the 7 solution to 7.0 bit when i go an do the 4 solution it will only calibrate down to 4.5-4.6......i jave it soaking in 7 solution to try to bring it back to life since it was sitting dry for 8-9 months, but i think its wishful thinking.
What do you think IC?
What do you think IC?
