UIUZMAR pH Meter for Water, pH Pen Tester Home Brewing, Test the pH Value of Drinking Water, Accurate Cider Brewing pH Meter With Backlight for Reef Tank, Aquarium, Hot Tub, Pool, Spa, Hydroponic

This does exactly what it says.It is simple to use although you do need three ~250ml containers to dissolve the PH buffer powders (if you want to try and keep it accurate). The instructions are easy to follow and you can use it straight out of the box if needed. It has a detachable hook on the back (looks like a pocket clip) which I have attached some wire to and hang it on the edge of the water bucketI have had no issues with mine, it is not perfectly accurate but 'is good enough for government work'.There are six sachets of the PH buffer powder, so you have enough to make up a second round if required. PH buffer is easy to come by in any case.I use it to PH water for growing plants and it is doing the trick admirably. Almost went for one which was much more expensive but it also did some other tests which I didnt need and I am glad I stuck with this one.If I have any issues I will update but so far, so good.

Arrived promptly, secure packaging great bit of kit and seems better than cheaper versions used in the past

Works better than other mid price pens I have tried

Easy to use and it gives temperature readings too. Much better than the yellow ones sold on Amazon.

Stopped working after a month, would like to know how I can return it!

Just not accurate despite having calibrated multiple times. Readings can be a full pH 1.0 below to 0.5 above compared to litmus paper and another meter. Reading drifts the longer you leave it in the solution. Sadly not recommended.

Tried the others (mainly yellow coloured ones) and they all fail within a few months. This one is accurate and also still going strong...