Review on Apera Instruments Benchtop Calibration Electrode by Jaleel Pruitt

That's probably overkill for my use case but I'm so sick of getting poorly designed/manufactured pool water pH meters. I've tried everything from $10 handheld gauges to $85 devices and they've all been extremely inaccurate. you get what you pay for; This element is easy to use, calibrated and incredibly stable in its readings. Get it right the first time, save time on returns; this is the one you want.