Bluelab Soil pH Pen - Direct Measurement in Soil, Coco Coir, and Potting Mixes

Fast, Direct Soil pH Readings Without Slurry Preparation

The Bluelab Soil pH Pen measures pH directly in soil, coco coir, potting mixes, and solutions - no extraction mixes or slurries required. Fully waterproof and equipped with a backlit LCD display, two-point calibration with a 30-day calibration indicator, and an integrated storage cap and dibber, the Bluelab Soil pH Pen is built for straightforward, reliable daily use across mixed-media growing operations. Backed by a one-year warranty.

Key Features & Benefits

• Direct substrate measurement - No slurry prep needed - just insert and read for immediate pH results in soil, coco coir, and potting mixes.
• Fully waterproof - Withstands wet greenhouse environments and can be rinsed thoroughly after use.
• Two-point calibration with 30-day indicator - Simple calibration process using pH 7.0 and pH 4.0 (or pH 10.0) solutions; 30-day indicator keeps calibration schedules on track.
• Automatic temperature compensation - Ensures accurate pH readings regardless of substrate or solution temperature.
• Integrated storage cap and dibber - Protects the probe during storage and doubles as a tool for creating insertion holes in dense substrates.
• Measurement range - 0.0 to 14.0 pH, 0 to 50 degrees C / 32 to 122 degrees F, with 0.1 pH and 1 degree resolution.
• 1-year industry-leading warranty - Made in New Zealand.

Who Should Use This

Greenhouse growers, nursery operators, and soil-based crop producers who need accurate, immediate root-zone pH data across soil, coco coir, and potting mix growing programs without the delay and labor of slurry pH tests.

Compatibility

Suitable for soil, coco coir, potting mixes, and liquid solutions. Operating temperature: 0 to 50 degrees C / 32 to 122 degrees F. Calibration requires pH 7.0 and pH 4.0 (or pH 10.0) solutions. Battery: 1 x AAA alkaline (included). CE, FCC, and RoHS compliant. Made in New Zealand.

Frequently Asked Questions

Can this pen measure pH in solution as well as soil?

Yes - in addition to direct soil, coco coir, and potting mix measurement, the Bluelab Soil pH Pen also measures pH in liquid solutions.

What is the measurement accuracy?

Measurement accuracy is +/- 0.1 pH and +/- 1 degree C (+/- 2 degrees F) with a resolution of 0.1 pH and 1 degree.

What is the storage cap used for?

The integrated cap protects the probe during storage and has a pointed dibber end for creating insertion holes in compact or dense growing media.

What calibration solutions are needed?

Two-point calibration uses pH 7.0 and pH 4.0 solutions (or pH 10.0 as an alternative). Bluelab pH calibration solutions are sold separately.