Simply dip and read the orientation of the display means no need to turn your head or tilt the tester. The WD-35423-10 EcoTestr pH 2 is a low-cost meter that is perfect for most applications. The single-junction electrode is recessed to protect against breakage. The WD3542310 offers up to three-point calibration with auto-buffer recognition for quick calibrations, automatic temperature compensation for accurate reading under changing conditions, hold function to lock measure value, and auto-off to prolong battery life.