PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium

I was surprised at the price but curious as I am used to paying a bunch for blue labs. The fact that it worked great and was accurate makes me wanna buy a few more just to have them Incase I ever need to double check my ph or if a friend needs one.Update: Product started to not read pH correctly and as I looked at the bulb, it was broken. I did not bang it on anything or do anything to it to causes issue but it broke. I’ve had labs in the past and I realize this is a vape brand ph meter But I don’t understand how the bulb would’ve broke. For the first few readings at read perfect. I’m not sure what happened

Works as it should!!!!

I’ve had one of these for several years, and it worked fairly well. After about 3 years it became erratic and unreliable, so I bought another one. Calibration doesn’t seem to work; the instructions say to “contact us”, but there is no contact information. This one reads about .15 low across the range of values, so I’ve just made a note of that, and it’s close enough for my purposes.

The product comes with three packets of different test solutions 6.86 4.00 and 9.18The instructions tell you how to calibrate the unit using 6.86 and 4.00I calibrated the units in the 6.86 solution and after following the instructions it calibrated to 6.86.This is good.When I immersed it into the 4.00 solution - it read 4.00 but the instructions don't say anything about that and so I followed the calibration instructions anyway, and when the calibration in the 4.00 solution was complete, it read 6.86Follow the instructions for calibration using the two solutions there was a BARELY COMPREHENSIBLE graphic showing that the calibration is in THREE steps, not two. It makes no sense.I reset the device (remove the battery, wait 30 seconds and re-insert) and then I calibrated using all three.The results of the first two were the same as before, but the third did calibrate for 9.18I then took the device to a Koi pond I have - and tested. The first test was ..... 6.86!!!!I rinsed and dried it, turned it off, then on then tested again. 4.38The instructions conclude "if the meter still does not work, contact us asap" However, neither the instructions nor the package give a phone number, a web site or an email addressMy conclusion is that this product is just a copy from available designs and that the manufacturer knows how to built it but has no interest in supporting it.I will be returning it

easy to use and works nice to check PH in my hydroponic system

Though straightforward and simple to use, this pH meter just behaves erratically in my hands.I'm a lab scientist, and I've used multi-hundred dollar meters many times. I don't expect this to be that. But I do expect it to give -roughly- the same measurement each time I use it, and to behave predictably.Even after it's been calibrated with the included standard buffers, this thing's reading drifts like crazy. I'm using it to pH-adjust nutrient solution to water my houseplants, and it takes a long time to stabilize once you put it into the solution. Even when (if?) the pH value settles on a single reading, the values don't always align with other readouts (3-pad pH dipsticks and General Hydroponics 5.5 - 8 pH solution).This meter does broadly correlate with approximate pH. It's not a nothing-meter. Maybe it would be more stable in strongly buffered solutions, or useful for science demos comparing strongly acidic or alkaline substances. But for my needs, it's too noisy and unreliable to trust my plants' health to.

Antifreeze tester it works not sure if it’s correct, but it works

Item came early, which is always good. Well packaged in a box, not just a bag. Easy to use. This one is my second in 3 years. Only thing...the box for a storage container was checked off as if it was provided, but there was none. I didn't care because I kept the one from my first one.