About This

• Reliable & Easy-to-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. *Note: readings in tap, reverse osmosis (RO) or distilled water may be slow and/or unstable due to insufficient dissolved Ions (salts).
• 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. The pen comes ready-to-use with a AAA battery included.
• Comprehensive Care Kit: The Bluelab Probe Care Kit pH includes everything you need to maintain your pH pen, including probe care instructions, 18 ml single-use Bluelab Solution Sachets for calibration (two each of pH 7.0, pH 4.0, KCl solutions), and three plastic cups for mixing solutions.
• Maintains Probe Integrity: The kit includes a pH Probe Cleaner and a specially designed toothbrush for cleaning the delicate pH probe, ensuring accurate readings and preventing residue build-up.
• Optimize Plant Health: The Bluelab pH Pen and Care Kit offer a complete solution for pH testing and management, helping you create the best conditions for your indoor plants or hydroponics, leading to improved plant health and greater yields. Ideal for various uses, including growing tents, swimming pools, drinking water, aquariums, fish tanks, and brewing