Bluelab pH Pen Meter and Probe Care Kit pH with Calibration Supplies, Storage Solution & Brush, Reliable Digital Tester for pH, Temperature in Soil and Solutions, Optimal Plant Health and Yield

Reliable & Easy-Use: The Bluelab pH Pen is waterproof, features a backlit LCD for easy reading in any light, and automatically adjusts for temperature changes.

Accurately measures pH in nutrient solution (acid or alkaline) for precise up and down adjustment with a lab-quality glass probe.

The pen's double junction electrode has a longer lifespan compared to standard probes due to less contamination.

It's more accurate and reliable than comparable pens, test strips, drops, and more.

Temperature Consistent & Durable: This hydroponics tester features ATC, providing consistent readings regardless of any temperature fluctuations.

It also reminds you when calibration is due.

Boasting a durable design, it's built for repeated use & is fully waterproof, even floating in solutions.

With an auto-off feature and a low battery indicator, this pH pen extends battery life and alerts you when it's time for a battery replacement.