All-New 2024 pH Meter for Water - High Accuracy Digital pH Tester (Accuracy 0.01) UL Listed and 3 pH Calibration Powder, Ideal for Home Water, Hydroponics,

Has to sit for five mins in water before turning on to.get an accurate reading and if u walk away it will shut off, but overall good product and readings are accurate

Works as advertised..

I have been doing simple Hydroponics for years now, nothing fancy, baby greens and lettuce etc. And I have used this type of models for years now. In the past, they usually last me about 2-3 years before they stopped working or go completely wonky. Unfortunately for this one, I got it right before a long vacation, so I did not start using it until a month later and after all the usual calibrating and etc, it stopped working by the third time (I usually use it once a week to check on the water pH). It basically goes all crazy with the measurements, like showing pH of 4.6 in tap water, then jumping to another number after I take it out and put it in the SAME water again. I even tried leaving it in for half an hour in the solution I am measuring it (Per their instructions), and I also did the whole 3 level pH recalibration thing again, but nope, it has flown over the cuckoo's nest and it is not coming back. And now, it is too late to return. I only gave it two Stars because the price was good and it came quickly.

Definitely cross reference your results or learn how to calibrate

Good meter, as long as you keep it submerged in the same basic fluid, while not in use, it seems to stay fairly accurate.