Bluelab® pH Pen

Fast, Accurate pH & Temperature Readings for Growers

The Bluelab pH Pen is a rugged, compact handheld meter engineered to deliver precise and reliable pH and temperature measurements in nutrient solutions, soil or coco media. Its double‑junction probe enhances durability and measurement stability - even in demanding hydroponic environments.

Key features include a bright backlit LCD display for easy reading in any grow light condition, selectable temperature unit (°C or °F), and automatic temperature compensation for accurate results under changing conditions. An easy 2‑point calibration keeps your meter tuned, with reminder alerts every 30 days.

Fully waterproof and built to float in solution, the pH Pen withstands the humid, wet conditions common in grow rooms and greenhouses. Its compact design makes it an ideal everyday tool for nutrient solution monitoring, runoff checks, or water quality control.

Designed for hobby to professional growers - if you're using hydro, coco, or soil‑based systems, the Bluelab pH Pen offers dependable accuracy so you can trust that nutrient uptake stays on point and plants remain healthy throughout every stage of growth.