Oakton Eco Tester for pH

Oakton - Ergonomically designed LC display means measurements can be seen at a glance. Economical, easy to use, waterproof, and dustproof, it's designed for use in dirty and damp field conditions.

Simply dip and read.  This low-cost meter is perfect for most applications. The single-junction electrode is recessed to protect against breakage. This Oakton pH pen offers up to three-point calibration with auto-buffer recognition for quick calibrations, hold function to lock measure value, and auto-off to prolong battery life.