Milwaukee Instruments pH 600 pH Tester With 1 Point Manual Calibration

I have never owned a pH meter before, having been put off by the price and their reputation for being fragile and temperamental. At only $18, the Milwaukee PH600 seemed like a good way to test the water (so to speak). So far I haven't had a need to invest in anything more expensive. I have been using this meter to create hydroxide precipitates and found it to be very stable and reliable. I recalibrate it every day, but it is only ever off by 0.1 or 0.2. The calibration is single-point, but I find that if it shows 10.0 in a 10.0 reference solution, then it will read 6.9 or 7.0 in the 7.0 reference solution. Just don't put the meter in very hot (e.g. boiling) water, the probe will crack like mine did. It still gives correct readings but I'm ordering another of the same model just in case I do something stupid again. It's true, as per some of the other reviews, that calibrating this device by sticking the supplied screwdriver in a small hole in the back while watching the front is a bit inconvenient, but to be honest one gets the hang of it pretty quickly, and I can't really think of a better design. If the hole was in the front or on the side, then it would be more exposed to water drops, at least in my process which involves taking measurements while stirring. And the simple, manual, analogue interface of turning a potentiometer is hard to improve upon. The meter arrived dry, but I put some pH 7.0 reference solution in the cap as soon as I opened the package, and as I said it works fine now. Update: I dropped my second one in salt water and it died. Even after removing the batteries, washing it in distilled water, and drying it, it still wouldn't go back to work for me. So I bought an $80 waterproof Hanna meter (HI98127). The Hanna one is temperature-calibrated, which I found out is important for what I am doing. It also has 2-point calibration. This requires standard buffers (7.0, and either 10 or 4) and is not as flexible as the screwdriver method, but actually works pretty well. And the probe can be separately replaced. I guess Milwaukee still gets five stars for the price, but think about whether robustness to splashes and temperature variations is important to your application.

I really liked the ease of use with the Milwaukee pH tester. I used the pH Tester to test my canning recipe for home grown tomato salsa. I wanted to be cautious with the acidity level being at or lower than 4.6. The product is very easy to use. You will however need to calibrate the instrument. I went to a local salt water fish store where the clerk sold me the calibration fluid which was totally affordable in my opinion and verified the reading of the instrument was correct. I recommend this product 100%. The salsa turned out delicious and safe!

I would give it a lower grade/star, but 1 is as low as it goes! It started messing up a month after getting and using it. Sometimes it turns on and other times you have to turn it off and on several times before it stays on. It constantly fluctuates giving high then low numbers while testing the same water. It's pure trash and of course they won't accept me returning it! Do Not Buy this...a complete waste of time, money and the damage its caused to my plants due to major inaccuracy!

The unit itself works well. I have used this model for several years in my hydroponic garden. The confusion comes in over the advertising descriptions. The description at the top of the page says the calibration solution is included. Farther down the page under “what’s in the box,” it plainly leaves out the solution, so even if you read carefully, you will not know whether you will get the solution or not. The page needs to accurately reflect what the consumer is getting. If you order the pen from THIS page, be sure to order calibration solution separately.

Works as described. I bought this pen to test the PH of plant nutrient solutions. I removed it from the packaging and noticed white mineral build up at the base of the pen. I can only guess, but I'd say this build up is from the pen being tested before packaging. The pen was placed in plain tap water and left to sit for a few minutes. (I was told to let it sit for several hours in the tap water, which was unnecessary.) Tests within .1 PH which I verified with liquid PH test solution. From what I've been able to gather the pen tip must always remain moist and never be left to dry. This is almost impossible to achieve with the pen CAP on. I've decided to leave the instrument in plain tap water during storage. The pen feels cheaply made but works well thus far, worth the price and is a great alternative to a 75-100 dollar PH gauge.

I found it very difficult to get reproducible measurements with this unit. It doesn't seem to hold its calibration very well. In my attempts to measure the pH of our tap water and various points of our recently installed RODI unit, there was tremendous fluctuation. I basically had to calibrate the unit 3 times during the process. It's very frustrating to use. Even calibrating it was somewhat difficult. You have to make absolutely minute adjustments of the calibration screw to dial in the right value. It seems like vibration affects its reading, so just tapping it to dislodge the bubbles can throw the measurement off. Also, although I know that this unit is not waterproof, it doesn't seem to be even water resistant. While rinsing it once, a little water splashed on the display. Before I could wipe it off, there was water *under* the display. The unit still seems to work, if you can call it that, after drying off. But it's disconcerting how easy it was to get water into the unit. I bought this because I thought it would be a good value. I was wrong. Now I'm looking to spend more in order to get something that works for me. I've had good luck with the HM Digital's COM-100 TDS meter, so I'm going to give their PH-200 meter a try next...

The best of the economical pen pH meters IMO. Good, reliable performance

No vale para nada y encima no admiten devoluciones segun el vendedor calibrado con tres numeraciones diferentes esta el ph al 4 y marca 6 esta el ph al 7 y marca 5 para colmo no admiten devoluciones un saludo

Gerät wurde mir zwei mal benutzt und defekt zugesandt! Verkäufer reagiert überhaupt nicht mehr....

articulo facil de usar y prectico el trato del vendedor excelente

This is a steal for the money. Reliable, easy to calibrate, east to use, arrived on time. I highly recommend this product