HydroFarm EcoTestr Plastic Digital Waterproof pH Tester Meter Pen (3-Pack)

The Oakton pH Meter is economical and easy to use. With its crystal clear, ergonomically designed display, you can easily view measurements at a glance. Each rugged tester has waterproof and dustproof housing for use in dirty and damp field conditions. Simply dip and read-the orientation of the display means there's no need to turn your head or tilt the tester. Single-junction electrode is well-suited for general purpose applications. The recessed bulb with bulb guard of the Oakton pH Meter protects against breakage, and its 1 point calibration with auto-buffer recognition for quick calibrations make your work a cinch. A hold function locks in the measured value, and the auto-off function preserves the batteries.