The Bluelab Soil pH Pen is a professional‑grade digital meter engineered to measure pH levels directly in soil, coco, rockwool, and nutrient solutions with exceptional accuracy. Maintaining the correct pH is critical for plant health, as it determines how effectively roots absorb nutrients. This pen gives growers instant, reliable readings, helping prevent nutrient lockout, deficiencies, and slow growth.

Built with a lab‑quality glass probe, the Bluelab Soil pH Pen delivers precise measurements while being durable enough for everyday use in indoor and outdoor growing environments. Its waterproof design makes it ideal for hydroponics, soil‑based gardening, and coco cultivation. With simple two‑point calibration, automatic temperature compensation, and a clear digital display, this pen is trusted by growers worldwide for its accuracy and ease of use.

Whether you're growing vegetables, ornamentals, or high‑value crops, the Bluelab Soil pH Pen ensures your plants stay in the optimal pH range for maximum growth and yield.

Key Features & Benefits

Accurate pH Measurement in Soil & Media

Designed specifically for soil, coco, and rockwool — not just water — giving true root‑zone readings.

Waterproof & Durable

Fully waterproof body ensures long‑lasting performance in demanding grow environments.

Lab‑Quality Glass Probe

Provides highly accurate, stable readings for professional‑level results.

Automatic Temperature Compensation (ATC)

Ensures precise readings even when temperatures fluctuate.

Easy Two‑Point Calibration

Simple calibration process keeps the pen accurate with minimal effort.

Long Battery Life

Energy‑efficient design for extended use between battery changes.

Measures pH & Temperature

Dual‑function display helps growers monitor environmental conditions more effectively.

Ideal for Hydroponics, Coco & Soil

Versatile tool suitable for all growing systems and media types.