Extech PH110 Waterproof ExStik pH Meter

I originally bought the "Oakton EcoTestr pH 2 Waterproof pH Tester, 0.0 to 14.0 pH Range" for $52.40 and it worked fine for a while. it is a sensitive device as most of these are. if you are the slightest bit careless, you will break it, and I did. a major problem when the electrode can not be replaced.I then moved to a much cheaper product the "Neewer New Mini Digital Pen Type PH Meter PH-009 I Multimeter Tester Hydro" for $10.89 and for the most part it worked, but with a fault. it constantly needed calibration with EVERY test, which is a huge pain when doing multiple tests.I finally couldn't take it anymore and bought this product... why did I not just get this to begin with??!! I saw the product, read the reviews and read its stats. ultimately deciding to go cheaper.. let me tell you something, DON'T!!Not only is this a quality product, working to perfection straight out of the box with ease, it also has the availability for electrode replacement, and though that part is expensive, its not as much as a brand new quality tester, and with care I shouldn't have to replace it for a long time!! I use it at a 7.0 calibration which is something not clearly specified in the instructions. it suggests a 4.0 cal. straight away. mine has worked perfectly with the 7.0!! the specs go greater into detail, just read them. but trust me when I say DO NOT GO CHEAPER THEN THIS PRODUCT!! you will eventually have to pay for this level of frustration free, quality ph testing. and the key words you need to focus on are, "frustration free!" haven't had a problem yet. I know all tech is not without its fair share of glitches, but I'll coast to that point versus stumbling in the dark pissed at life and my poor decision making. =)Also it may be difficult to know which product it is that you are getting. there is one with a refillable electrode (solution residing within) I believe.. this is not that product. there is a little sponge in the bottom of its cap you keep moist with desired calibration solution.

Answers the questions about PH I needed.

I bought one of these in 2012 and last night I checked the calibration on it, and it’s still right on. This is a diamond in the rough. Today I’m buying another one just in case they stop making them, and I bet I’ll still be using it when I’m an old man.

Broken right out of the box . Works well otherwise.Sucks that it's too much trouble to replace it - not worth the time of packaging & shipping out , then waiting on a new one.Tired of getting Amazon stuff that was broken BEFORE it was packaged and sent.

While I know this might not be the "best" or the "perfect" pH meter, it (or at least the one I rec'd) is accurate...I'm using it in cheesemaking and hitting my pH markers.I wish it returned the reading faster than it does, but to get that, it'll cost you almost double the price, so I'm content with slower.

Easy to Calibrate and so far very accurate

I got this for an aquaponics system. I really didn’t know how to even use this. It seemed very confusing so I didn’t try. I ended up giving it to a chemistry teacher so hopefully she gets some use out of it.Also, I had no idea you needed calibration solution though when I got this. That stuff isn’t cheap.

I got this for cheese making since I wanted to take myself to the next level. The device is pretty nice and sturdy, and the readings are fine. I like the ability to hold the values and recall them later, so I can take my notes.However, it was rather difficult and frustrating to work with this tool. I found myself calibrating it over and over again because I was getting strange readings, changing the calibration buffers etc. It doesn't always settle, sometimes it settles on something and then slowly adjusting over the course of 3-4 minutes quite significantly (for example, it would "settle" on 6.3 and then reduce to 5.7 slowly while still being "settled" - not blinking). It often made me miss my times due to messing with the tool too much, and I couldn't rely on the readings..I ended up keeping it for random pH needs (like gardening etc), but for cheese making I got a proper cheese meter (Hanna Instruments HALO2 Wireless pH Tester for Cheese) which is just another level, for around $150. I don't have to bother with the tool anymore, and can focus on my cheese!