Hanna Instruments Groline Hydroponic Waterproof Portable Meter

High quality.....reliable!!! I recommend it!🤙

Tried just about every brand meter and have been using this one for 4 years now. Make sure to stay up on cleaning it, calibrate it at least once a month, and keep it in storage solution.

This is the easiest meter I've used yet. I also have the groline version below this which is the stick kind ($209 model) and this is worth the extra money so far because you dont have to stick your head in the reservoir to try and see the reading. This one also has a bright backlit display unlike the other model and seems to hold calibration longer.

two major points for me were the single calibration for PH/PPM and the meter displaying the condition of the probe. What they fail to mention is the meter will NOT display the probe condition unless you use a 2 point calibration which means instead of buying 3 solutions at 57$ every few months for regular maintenance you have to buy 5 solutions every few months at 95$. update September 22: probe failed for no reason. just stopped reading PH and wont calibrate despite the meter sensing the probe.

This is another super quality ph meter from Hanna, who in my opinion has the best, better than Any I’ve tried in 30 years. I’ve had one of their meters for almost 25 years. The one feature they neglected and the only reason for not getting 5stars is NO BACKLIT DISPLAY!!! Some reviews say it does, but without doubt the 9814 does not and that’s sad for a quality piece like this