The Essentials pH Meter is a dependable, easy-to-use digital pH tester built for regular use in hydroponic and soil-based growing environments. With a 10-reading memory, water and shock resistance, and straightforward one-button calibration, it gives you accurate, trackable pH data without the complexity of professional lab instruments. Key Features 10-Reading Memory — Log and track pH changes over time, making it easy to spot trends or react to abnormal readings Water Resistant — Floats if accidentally dropped in solution; safe if removed and dried promptly Shock Resistant — Withstands accidental drops without damage Low Battery Alert — Warns you when approximately 2 hours of runtime remain Energy-Saving Auto Shut-Off — Powers down automatically when not in use to preserve battery life Simple One-Button Calibration — Dip the probe in VitaLink Essentials Calibration Fluid and press CAL — no complicated multi-step process Calibration Compatible with VitaLink Essentials Calibration Fluid. Calibration takes seconds: submerge the probe and press the CAL button until CAL appears on screen. That’s it.