• Measures pH in nutrient solution (acid or alkaline) for precise up and down adjustment with lab quality glass probe; General uses include growing tent, swimming pool, drinking water, aquarium, fish tank, and brewing
• This hydroponics tester has ATC that provides consistent reading regardless of any fluctuations in temperature; Calibration reminder; Durable design for repeated uses; Fully waterproof and floats in solutions
• Double junction electrode has a longer lifespan compared to standard probes due to less contamination and is more accurate and reliable than comparable pens, test strips, drops, and more
• Combine with ppm meters for full indoor garden nutrients monitoring in water and soil; Other features: Auto off function, low battery indicator, units for temperature; KIT INCLUDES: AAA battery, lanyard, and calibration solution
• IF PROBE IS DRY, SOAK IN KCL SOLUTION FOR 24 HOURS, KCL SOLUTION IS SOLD SEPARATELY; Made in New Zealand, and manufactured by Bluelab, the industry leader in hydroponic testing equipment; 1-Year Limited with proof of purchase

Product Description

Model: PENPH

Bluelab pH Pen promotes healthy growing with precision

A compact and robust handheld solution

Key features include:

Everyday accuracy of the fundamentals

This user-friendly and hardy handheld pen will take measurements in increments of 0.1 pH and is fully temperature compensated, so you can expect accurate readings every time.

Get the fundamentals of growing right, every time

Healthy plants need a balanced diet

pH plays a pivotal role in making the nutrients in your solution soluble so that they can be accessed by your plants. To help your plants thrive, get the fundamentals right by measuring pH and temperature to ensure that these are always within the optimal range.

New Zealand-made quality, built for growers

Our products are designed and built with growers, for growers - so you can relax knowing that your pen can withstand the knocks, drops and deep-water plunges that come with everyday growing. The Bluelab pH Pen has been designed and built in New Zealand.

Tried and trusted by growers like you

Easy calibration

Get rid of the headache of calibration with our simple two-point calibration process. Remember to calibrate before first use. Each pen comes with a 30-day calibration indicator that can be easily viewed on a backlit LCD display.

Fast and accurate readings

A double-junction probe comes standard with the Bluelab pH Pen. Unlike standard glass bulbs, the double-junction probe reduces build up on the probe for consistent readings and to increase lifespan.

Superior design and manufacturing

All Bluelab products are proudly designed and manufactured in New Zealand. The design focuses on ergonomic qualities to assist with regular use in varying grow environments. Our rigorous production process includes each pen being inspected by hand before it finds its way to you!

The Bluelab promise

All Bluelabs handheld pens come with industry-leading support. This means that you can have complete peace of mind when you invest in the Bluelab pH Pen.

Bluelab: Trusted by growers like you for over 30 years

For over 30 years, Bluelab has been providing award-winning and innovative technology that helps growers unlock their plants full potential. At Bluelab, we believe that our commitment to designing hardy, purpose-built products and creating strong educational programs will help elevate the standard of growing. Together with our growers, we will create a world with fewer pesticides, food miles and less water usage. Let Bluelabs products take your growing to the next level.

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Product Information