Extech PH100 Waterproof ExStik II pH Meter Kit, Flat Electrode | pH 0.00-14.00, waterproof, ATC, flat-surface electrode, temperature display, auto power off, sample cup

just the job we use a few of these and always does what it is supposed to do ie tells us the PH of the water leaving the factory

The pH meter does its job but it lasts only a couple of months. Being that the probe can’t be replaced, I think it’s expensive. I wish the readings were more stable as well cause it takes time to show a reading and even so it keeps changing.

Doesn't last and impossible to find replacement filler solution. The cost of a new electrode (if you can find one) is more than the cost of a a new pH meter. It's over-priced and has poor support after sale.

Just what i needed

Not very accurate when tested in calibration fluid and is a bit inconsistent. But for the price it is good enough if your not looking for pinpoint accuracy.

very good not sure if it have been calibrated

Instable au niveau des résultats. Beaucoup de variations sur une même solution. Je pense que le produit n'est pas fiable ou l'électrode endommagée.

Tout parfait

So far so good

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.

Shipping was fast and product works awesome.