A4
If you are really trying to save money you can get away with this one for a decent price. Make sure you buy the calibration liquids with it, very important! You will need to calibrate it once a month or so because they do get off.
http://www.amazon.com/Hanna-Instrum...id=1379976644&sr=8-1&keywords=hanna+ph+tester
If you can splurge, I would buy this one. It is the one I own and you will never have to buy another meter again if you take care of it.
http://www.amazon.com/Hanna-Instrum...id=1379976818&sr=8-6&keywords=hanna+ph+tester
If you wait to get your income taxes back I would buy this one, the finest meter on the market in an affordable price range my opinion.
http://www.amazon.com/Bluelab-Combo...qid=1379976836&sr=8-6&keywords=blue+ph+tester
http://www.amazon.com/Hanna-Instrum...id=1379976644&sr=8-1&keywords=hanna+ph+tester
If you can splurge, I would buy this one. It is the one I own and you will never have to buy another meter again if you take care of it.
http://www.amazon.com/Hanna-Instrum...id=1379976818&sr=8-6&keywords=hanna+ph+tester
If you wait to get your income taxes back I would buy this one, the finest meter on the market in an affordable price range my opinion.
http://www.amazon.com/Bluelab-Combo...qid=1379976836&sr=8-6&keywords=blue+ph+tester