Why should I choose the Bluelab pH pen over others?

The probe quality. Highly accurate, compensates for temp & is fast to a stable reading. It's a double junction probe, so it's durable. And it's full of thoughtful touches (the ring on top, the storage cap, the calibration indicator to name a few).

Other pens come with a hard carry case & calibration solutions in plastic bottles. Yours does not. Why is that?

Great question. We have made the deliberate choice to make our packaging as sustainable as possible. To that end, our packaging is all fully recyclable, with no hard plastics or styrofoam inserts.

How does Bluelab make calibration super easy?

Calibrating is an easy & fast process! Each pen includes calibration solutions & clear instructions. A check mark appears when the pen is calibrated. When the pen loses calibration, the check mark disappears, informing you it's time to recalibrate.

I sometimes see a white crust built up on the end of the pen. What is this?

This is very common in pH meters & is nothing to worry about. The storage solution used to hydrate your pen (and extend its longevity) is potassium salt, which sometimes dries as a white crust on your probe. Simply rinse this away under water.

Can I use the pH Pen to measure the pH of tap water, distilled water, or reverse-osmosis water?

No. For distilled & RO water there aren't enough dissolved ions (salts) for a stable pH reading. For tap water, w/o sufficient dissolved minerals, the answer is also no. Adding a few drops of KCL storage solution may work to enable a stable reading.

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Description

🌿 Precision pH control that keeps your grow ahead of the curve!

PRECISION P H MASTERY - Lab-quality double junction glass probe ensures unmatched accuracy for your hydroponics, brewing, or water testing needs.
COMPLETE GROWERS KIT - Includes AAA battery, lanyard, and calibration solution—everything you need to start testing immediately.
ALL WEATHER DURABILITY - Fully waterproof design built to withstand the rigors of professional grow environments and fieldwork.
EFFORTLESS CALIBRATION - Easy two-point calibration with reminders keeps your readings reliable without the hassle.
SMART POWER MANAGEMENT - Auto-off function and low battery alerts mean your meter is always ready when you are.

The Bluelab BLU8000 PENGTB Grower's Toolbox with pH is a professional-grade, waterproof digital pH meter featuring a durable double junction glass probe for superior accuracy and longevity. Designed for hydroponics, brewing, and water testing, it offers easy two-point calibration, auto temperature compensation, and smart power-saving features. This New Zealand-made tool comes complete with battery, lanyard, and calibration solution, backed by a 1-year warranty, making it the trusted choice for serious growers and professionals.

Specifications

ASIN	B005POOJHG
Brand Name	Bluelab
Country Of Origin	New Zealand
Customer Reviews	4.4 4.4 out of 5 stars (4,573)
Global Trade Identification Number	09421024920234
Included Components	PH Pen
Item Dimensions	20.3 x 5.5 x 2.5 centimeters
Item Type Name	pH Meter
Item Weight	122 g
Manufacturer	Bluelab
Material Type	Glass
Model	pH Pen
Part Number	PENPH
UPC	706842510010 715706332132
Unit Count	1 Count
Warranty Description	One year free repair or replacement guarantee

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