Any advice on PH meters less than $120 would be greatly appreciated
3 Likes
Apera 20 
My recommendation for a TDS pen
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The Apera pH20 or pH60 are both great
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used many models before getting the Apera PH60…been nearly 3 years with this one and holds calibration points…
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I waited like 90 days between calibrations once. Was still within .03 with all solutions.
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Apera has been good to me, had their ph20 meter for about a year and the probe went bad. Messaged them and they sent me another meter free of charge.
UIUZMAR i’ve had almost 2 years now and been calibrated maybe 3 times was always .2 within calibration fluid i was using at the time been a great piece for me