2.0" LCD Digital Folding PH/Temp/Humidity Tester (4 x AG13)

Pros: Main points: price and availability
A product that does not look in promotional photos.
In the photos looks like a toy, but it is not! really is a device for professional use.
The lcd screen is very generous and data presented are easy to visualize and understand. The container box provides protection but should be treated with caution as the plastic is somewhat delicate.

Cons: In contrast, in my case is that the manual is in English, but not too much trouble.

Other: DealExtreme Another product offered at a price more than access to an article in the local market in Argentina is not achieved, so if someone in my country this type of product requires BUY without hesitation.
You will not find better prices in other pages of e-tailers

Pros: -Works really well, very precise -Also has temperature and humidity sensor -Auto turn-off saves batteries -Calibrate it using a buffer solution (Not included) or distilled water at pH 7.0-7.1pH -Glass electrode

Cons: -You HAVE to calibrate it every time you use it. Otherwise, you will get bad readings (not really a con, says it in the manual) -Open it slowly so the electrical connections don't get damaged -The last pH digit is useless, because the precision it's just +-0.1 PH, so just dont pay attention to it

Other: You HAVE to buy a buffer solution for calibration ad calibrate every time you use it.