Milwaukee Instruments pH600AQ pH Tester With 1 Point Manual Calibration

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

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

articulo facil de usar y prectico el trato del vendedor excelente

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

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.