For sale: Bluelab pH pen

The Bluepen pH is an accurate, easy-to-use, hand-held electronic pH tester with built-in thermometer for soils, liquids, foods, chemical solutions, etc. This unit is less than a year old and was only used a handful of times. I no longer have a need for it. New ones sell for about $90 on Amazon; this one can be yours for only $40. Note, however, that this only includes the pH pen–it does not come with storage or calibration solutions, which are necessary for accurate readings and are available from Amazon and other retailers.


More info:
Bluepen Website
Amazon link


pH Pen $40