BL Bluelab pH Pen

I got this because the cheap ones are lucky to last 3 months. I went through 5 of them in two years. It gives excellent accuracy (I compared it to strips) and lasts. It's a bit more fiddley but that because they have a product that works and to work it has to be fiddley. It's easy once you get it calibrated but you have to clean and calibrate once a month so get some of the Ph buffer solution packets in bulk. You have to have both the 7.0 (usually 6.85) and the 4.0s to calibrate. Again, this is an actual scientific instrument so treat it right and it will treat you right.

Just like any other ph pen I have used. It needs constant calibration to remain accurate for growing cannabis. Bought brand new calibrated it successfully and with in a week it was out .1 ....used it for another week...same thing. Now I need to buy more storage solution and calibration solution as it only ones with singlenise packages. Expensive tool to use and maintain. We will see how long it lasts!

Looks used, had no English instructions, no proctective (plastic) layer on lcd screen, was stained blue from postage rough handling... I just hope it’s actually accurate!5/5 product if you receive it new :) enjoy! Great instrument! Easy to use and simple! Temp is a nice feature I guess but I will stick to Hanna

When PH matters, get yourself a blue labs ph pen. Very easy to use and calibration is done at the push of a button. The package included ph 4.0 and 7.0 calibration fluid along with the storing fluid. After a couple weeks, you can definitely tell the difference. You get what you pay for.......

Fast delivery. Works great . I wish I purchased blue lab first instead of wasting time and money on cheaper units. Just get blue lab and stop wondering if it's the correct reading. It is.

BY far the best PH meter I’ve used in years. No need to recalibrate over and over unless you store it wrong. Great product I use it for my hydroponic system and my fish tanks.

This pH pen it's the best on the market I will not use anything else what glue lab equipment for my hydroponic needs you would just be wasting your time with anything else

Quality as usual is great. Spend the extra few bucks and buy a good pen like a Bluelab and save the hassle a cheaper pen will cause.

Great product wish I woulda just bought it to begin with than spending same amount of money on different cheap models that are crap.

Does exactly what it says on the label just like every other piece of equipment I have from blue lab don’t hesitate Buy it