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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pH Pen - ± 0.1 pH Accurate, Durable Double Junction Probe, Waterproof & Floats, Auto Temperature Compensation, Easy Calibration - Made in NZ

Product ID: 4206087

Details

Brand
Bluelab
Item Weight
4.32 ounces
Item dimensions L x W x H
8 x 2.16 x
Material
Glass
Number of Items
1

💧Waterproof & floats

⚖️±0.1 pH accuracy

🌡️Auto temperature compensation

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A$191

Duties & taxes included

In stock

Sold byAmazon AustraliaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌿 Master your pH game—precision and durability that keeps you ahead of the growth curve!

DOUBLE JUNCTION DURABILITY - Advanced probe design minimizes contamination and extends lifespan for reliable, long-term use.
PRECISION THAT POWERS GROWTH - Achieve nutrient-perfect pH control with ±0.1 accuracy for thriving crops and clean water.
BUILT TO BRAVE ANY ENVIRONMENT - Waterproof, drop-resistant, and floats—your pH pen is ready for every hydroponic or aquatic challenge.
DESIGNED FOR THE ON THE GO PRO - Auto-off, low battery alert, temperature units in °C/°F, plus a handy lanyard for hands-free convenience.
SMART CALIBRATION ZERO HASSLE - Two-point calibration with easy-to-use sachets and a 30-day calibration reminder on a backlit display.

The Bluelab pH Pen is a professional-grade, highly accurate (±0.1 pH) digital meter designed for hydroponics, aquariums, pools, and soil testing. Featuring a durable double-junction probe, waterproof casing that floats, and automatic temperature compensation, it ensures precise, reliable readings in tough environments. Easy two-point calibration with included sachets and a 30-day calibration reminder make maintenance effortless. Made in New Zealand, this compact, lightweight tool is built for professionals who demand accuracy and durability in their nutrient management.

Specifications

ASIN	B005POOJHG
Best Sellers Rank	#10,731 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #15 in Lab pH Meters #51 in Soil Meters
Brand Name	Bluelab
Customer Reviews	4.4 4.4 out of 5 stars (4,760)
Global Trade Identification Number	09421024920234
Item Dimensions	8 x 2.16 x 0.98 inches
Item Weight	4.32 ounces
Manufacturer	Bluelab Corporation Limited - Import (NZ)
Material Type	Glass
Model	pH Pen
Part Number	PENPH
UPC	706842510010 715706332132
Unit Count	1.0 Count

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