How to calibrate digital pen?

Excluding first use, YOU MUST CLEAN the probe before calibrating. Hydrate the probe before first use and after cleaning. After hydration, rinse probe in fresh water and place in pH 7.0 solution. Wait for the reading to stabilize. Press the cal button until CAL is displayed

Can I use any known pH solution for calibration? How do I order new calibration packets/solutions?

Yes Any ph solution is good. I like this tester because ir is easy yo use. Turn it on, dip it into the water to be tested, Instant reading. Good easy tester.

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Description

🌟 Elevate Your Testing Game!

SUPER VALUE PACK - Includes 1 pH meter, 1 TDS & EC meter, and 1 soil tester for all your needs.
PRECISION TESTING - Achieve accurate readings with a remarkable ±0.01 pH precision.
COMPACT PORTABLE - Lightweight design makes it easy to carry for on-the-go testing.
USER FRIENDLY DESIGN - No batteries needed! Just press 'ON' for instant results.
VERSATILE APPLICATIONS - Perfect for water quality checks, gardening, and hydroponics.

The Extenuating Threads PH Meter, TDS PPM Meter, and Soil PH Kit is a comprehensive 3-pack solution designed for accurate water and soil testing. With features like auto temperature compensation and a user-friendly interface, this kit is perfect for professionals and gardening enthusiasts alike. Enjoy precise readings and versatile applications without the hassle of batteries.