PH Meter Tester, Preciva 0.01 Resolution Digital Automatic Water PH Meters Hydroponics Pen with LCD Screen Large Backlit for Kitchen, Aquarium,Pool, Laboratory with Calibration Powder

Given the marmite-like quality of the reviews on this product, I thought I would wade in with my experience so far. I have a few tanks and recently really got into trying to understand water chemistry and testing. I wanted a "second opinion" on my liquid pH kits so bought this pen. It seems to confirm, though with great granularity, ease and accuracy, the results of my liquid kits, which I find quite hard to read (I always imagine that I can see the pH colour going in the wrong direction!). I tend to buffer my own RO water and this pen is accurately reading the results of the buffering – for example, I use Lake Tanganyika buffer to raise the pH to 9. I tested with the liquid kit, which read 8.5-9.5ish, whereas the pen was reading 8.9-9.1, as I would have expected. To ensure more accurate alkaline readings, I purchased a 9.18 buffer for calibration – it was only off by a little when it arrived; it was bang on the neutral buffer though! I will continue to use this product and would recommend to others. However, I would say having multiple options to read pH would not be a bad idea, just in case. Originally, I was going to spend £100 on a Hanna pH pen – which has reviews that are also somewhat mixed – and all the buffer, cleaning chemicals and storage solutions that it requires, but thought I'd first take a chance on this pen – for now, this seems to have paid off.

I bought this pH meter to monitor my kombucha brewing. So far I've found it very handy and can't really fault it for home use. Readings tend to stabilize after about 4 seconds, which is pretty good.Calibration out of the box was off by about 0.15, but the included buffer packets lets you take care of that, which is nice. One thing to note is that the calibration is linear, meaning you basically just set an offset for the reading the meter gives. You cant adjust the scale if it gets off over time, so the meter will be less accurate as you get further from the pH of the calibrant. However, this shouldn't be an issue for non-scientific applications.tl;dr: A great choice for home-brewers, cheesemakers, and more. Calibrate it on first use.

This pH meter is a joke. I finished calibrating as instructed but its producing laughable results. It says standard deionised water is pH 8.7 (wrong) and the same deionized water 1l mixed with 10g of sodium bicarbonate is pH8.31. Obviously it should be higher with alkaline materials in it. I keep switching it between both solution and it believes plain deionized water is more alkaline. Don't waste your money.

Easybto use and great value for money, glad I bought this

Arrived on time. Come calibrated and with additional congestion l calibration packets. Bit plasticy but decent build. After the first use it finds the pH fast. Very precise. Can't fault it

This is a good little ph water tester I have it for the chemical levels of my swimming pool - it is easy to read and straightforward except it is quite difficult to calibrate it due to the screen that adjusts it is in an awkward position on the back of the pen (my previous models have had them on the side which makes it easier). Apart from this a good piece of essential equipment for our pool maintenance and safety to check correct chemical levels.

Seems to be a decent budget pH meter which I bought to check my mash pH for all grain brewing. However, the claim that it's pre calibrated is nonsense, mine was nowhere near, reading pH 8.5 in tap water! Using the included buffer solutions and following the calibration instructions soon had it reading correctly. Just glad I checked it before it's first use though!Other than this it works well, I can't comment on longevity, but at this price, if I can get 12 months use from it, I'll be quite happy.

Does the job I need it to