Digital pH Meter Pen-Style Water Quality Tester

Keep every drop of water precisely balanced with this compact, pen‑style digital pH meter. Built for versatility across home aquariums, pools, spas, and light professional use, it delivers fast, dependable readings in a sleek, pocket‑friendly design.

Why this pH meter stands out

• High‑precision readings with a measurement range from 0.0 to 14.0 pH, a resolution of 0.1 pH, and accuracy to ±0.1 pH for consistently reliable data.
• Automatic Temperature Compensation (ATC) automatically adjusts for temperature changes from 0 to 50 °C (32–122 °F), so you don’t have to guess how temperature affects pH.
• Compact, pocket‑friendly design with a slim profile (155 × 31 mm) and a comfortable grip for quick in‑tank checks or on‑the‑go testing.
• Two simple controls a dedicated ON/OFF button and a CAL button keep calibration and operation straightforward, even for first‑time users.
• Ready to use right away ships with three AG‑13 button batteries included, so you can test as soon as you unbox it.
• Calibration guidance a note recommends calibration with calibration powder before first use to ensure data accuracy and reduce potential errors.

What you can test

Perfect for maintaining optimal water conditions in:

• Aquariums and fish tanks to keep fish healthy and algae in check
• Pools and hot tubs to balance sanitizers and prevent skin or equipment issues
• Spas and hydrotherapy setups where precise pH helps comfort and equipment longevity
• Light laboratory, classroom demonstrations, and basic food/food‑processing applications

How to use in 4 simple steps

1. Remove the cap and insert fresh batteries if needed. Press the ON/OFF button to power up.
2. Calibrate with calibration powder before first use to ensure accuracy.
3. Rinse the probe with distilled water, dip into the sample liquid, and wait for the reading to settle.
4. Record the pH value and rinse the probe after measurement to keep it ready for the next test.

What’s included

• 1 x digital pH meter (pen style)
• 3 x AG‑13 button batteries (included)
• Note: Calibration powder is recommended for initial calibration to ensure precise readings.

Why choose this tester

It combines the immediacy of a pen‑style meter with robust accuracy, thanks to a stable 0.1 pH resolution and ATC for temperature‑correct readings. The lightweight form factor makes routine checks effortless, whether you’re adjusting an aquarium’s balance after a water change or verifying pool water before a swim season. With clear digital display and intuitive controls, you’ll spend less time fumbling with equipment and more time ensuring water quality that supports healthier aquatic life and more enjoyable water experiences.