bkelley02
Premium Member
How often to you replace the probes for your PH monitor. I think it's time for mine to go as I can't get it calibrated anymore. I can get it to read 7ph on the solution, then when I use the the 10ph solution to get the high end to, it's always 9.7. I adjust it to read 10, and recheck the 7 pm solution, and it always reads 7.3. It's a Milwaukee Monitor/Probe and I haven't had this problem before. Any ideas or is it just time for a new one?
