AC Infinity pH Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools

Fantastic piece of kit. Well worth the money

Out of the box the item was well calibrated, reading 6.98 in the 7.0 test solution. I moved it to my fish aquarium and noticed the temperature was taking FOREVER (~5 minutes) to move from 70F to 80F and the pH readings would continue to move until it hit the right temperature. This was a major annoyance as that's way too long to stand there holding this pen. Given it's waterproof, I left in in a shallow part of the tank for 30 seconds while it adjusted to the temperature and when I checked it, it went to -2pH and is now stuck there. Will return due to the error. Would have likely returned due to how long it takes to register temperature regardless as my bluelab is near instant and that's what I'm used to. Everything was torqued down out of the box, but I opened afterwards and verified that water got in past the primary seal around the sensor.

Ich habe nichts zu beanstanden kommt in einem schönen koffer wo alles sehr aufgeräumt drinn ist die sonde kann man tauschen falls mal kaputt wirklich ein super gerät

Finally upgraded my PH meter game to Pro level, the calibration is pretty straightforward, great quality pen, easy solutions to use the pen directly recognizes the USA standard solutions, so if you use NIST solutions you must purchase those separately, the value you get for your money long term by just investing in a powerful stick alone makes it worth, easy settings to configure and navigate.

Einfache Bedienung. Lange Batterielaufzeit.