GISNPA PH Meter, Digital 4-in-1 PH ORP H2 Temp Meter, PPB/PPM Meter with ATC, 0.01 Resolution High Accuracy PH Tester for Drinking Water

The main thing when measuring your H2 levels make sure your sample contains hydrogen gas! I used it to test a newly purchased V8 water hydrogenator, but it couldn't generate any hydrogen in a distilled water, you need slight amounts of minerals for the electrolysis to happen, but once tested with the filtered tap water (PH 7.5) it showed me 1300 ppb, that actually is exactly what the spec of this hydrogenator said it would generate. it takes about 10 to 15 seconds to start showing hydrogen level, so be patient. Also give it a chance to settle down on a value. Overall this is a pretty good value and quality little tool to help you test your water!

PROS: None.CONS: Most of the senses are completely off! For example, here it's attempting to read the water temperature, I know for a fact the water is 40°F (5°C), but this device constantly reports it as 70°F (21°C). Even after multiple calibrations, the temperature is off by 15° at best. This is absolutely unacceptable! On a digital device, if it's off by a single degree then it is not a trustworthy device.That was just the temperature, it cannot read pH levels, H2 levels or ORP levels correctly either. Even the pH levels are off by two points. When pH levels are off by one point, it's dangerous! This company needs to be investigated and this product needs to be removed from the listing immediately.BOTTOM LINE: Do not buy!

Works great. I have two. I measure the pH of my pee (trying to become internally alkaline to combat ) and another to measure the pH of my water and its ionization created by my hydrogen bottle. Used them everyday for a year now. Easy to read the screen, other screens too small and I returned those.

This is a nice meter, seems to be well made, and certainly a huge improvement over my decades-old meter. It appears to be calibrated correctly, when I measure the water temperature between this meter and my old meter the temperature is virtually the same, the pH meter and the other meters give readings that look consistent with what tap water should be. I was unable to get any reading with the PPM and PPB settings at all.I don’t know if it’s not set up to do that out-of-the-box or if you have to calibrate it to display those values, that’s a pretty basic value that I would think it should display with no problems. I guess I’m going to have to go through the calibration routine and then see if it displays those values.With the exception of that, it is a nice meter and seems to be well designed it’s easy to replace the batteries which are three button types you simply unscrew the top and replace them and the electrodes are replaceable as well, so you should get a lot of life out of this meter.

I got this primarily for checking hydrogen levels in a few different hydrogen water bottles I tried, suspecting that some had prices and hydrolysis times that were too good to be true. I did *not* know that you have to leave it in for 2-3 min before it will even start to register hydrogen levels (I found that somewhere else), so the first times I tried to use it, I wasn't sure if *all* the bottles were faulty, or the meter was the problem. Once I left it in longer, tho, it *did* start registering H2. However, but very *slowly* climbed up. And here's the thing.... Hydrogen rich water loses its hydrogen very quickly. I mean, you basically have to slug it, as soon as you take the cap off your bottle. By 5 min after the cap is off the bottle, it has already dropped by, like, half, and is continuing to lose H2. Well, the meter is so slow that it still hasn't caught up to the actual H2 level before the levels have gone substantially down. So... Altho I was able to validate that one of the bottles did indeed produce H2 (at least 2000 ppb), I could not validate that it produced anywhere near the levels claimed the the bottle producer (5000-10000 ppb).

The media could not be loaded. UPDATE: Completely broke after 13 months after minimal use, probably only a couple dozen times; batteries were still half full. Super disappointed!This device appears to accurately measure hydrogen, pH, and ORP. It's affordable and confirmed that my hydroxy (Browns Gas) generator works. Thank you!

I bought this to measure the amount of molecular hydrogen in water. It's accurate, easy to use, and great value for money.

The only real use for this device is to determine the presence of hydrogen in water. The accuracy of the device is poor at best with slow, wild and inaccurate results. Comparing test results with blue drops yielded results that were far different from the results obtained with this device. Even the temperature is incorrect by over 10 degrees.