PH Meter

HM Digital, less than $25. I have used mine since 2015, with flawless operation.

On amazon or aliexpress , they are all accurate if well calibrated , the best brand will not require frequent calibration that's it. Buy any cheap one or many of them andget a bottle of ph4 calibration liquid and one of ph7 to calibrate your ph pen when you needs to

Amazon maybe 🙏 I keep three cheap pens (-$20) calibrated once a grow, my water runs right at 7.0 so always a quick test. I use three cheap ones instead of one good one cause they ALL fail. This way I have three pens to make damn sure none of them has gone off into the weeds. The dyes are ok but really only ballpark, keep em as a backup

I hear ya. Some are real expensive but real gimmicky. Here's a quick link to a bunch of well priced units. Amazon is the answer👍. I personally use the Milwaukee pH pen and it's done really well by me. Remember to buy 7.0.calibration liquid too so you can test your pens accuracy whenever you please. Cheers! https://www.amazon.com/s?k=ph+test+pen&ref=is_s