Ph meter

After 10 years of using bluelab meters, handheld/guardian I’m switching. After about 3 different designs with their probe they don’t stay calibrated with each other. Both my guardian and handheld never read the same they are 1-2 points off after calibration & I’m just so frustrated with them. Any other companies would be helpful


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Hannah, oakton, found some nice bench top units on ebay pretty cheap. Im going with a bench top for my next meter. Probes are replaceable, cheaper than the blue lab probes too.

My bluelab meter is pretty consistent as long as the storage solution is used religiously. Even thought the calibration mark is still present, it tends to be off, so I calibrate ever other week.

Mine used to be into they changed probe design
Will say those oakton look promising and I can just use my ec meter.


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Milwaukee SM 101.

i have had only one sensor go bad in three years of using
Myron L Ultrapen PT2 Waterproof pH and Temperature Pen.
it holds calibration better then any of the other hand held ph meters i have had.i only think the sensor went bad due to the storage solution evaporating.