Bluelab pH Pen — Handheld pH Meter

Bluelab pH Pen — The Handheld Standard

The ultimate hand-held pH meter for growers — accurate, robust, and simple to use. The Bluelab pH Pen is the pen most UK growers settle on after trying cheaper alternatives; Bluelab's reputation for accuracy and probe longevity is well-earned. Tells you exactly what your nutrient solution pH is, in two seconds, with one hand.

Why growers choose the Bluelab pH Pen:

• Industry-standard accuracy — Bluelab is the reference brand for hydroponic pH measurement
• Replaceable probe — when the probe wears out (and they all do eventually), just replace the probe rather than the whole meter
• Simple two-button operation — power and calibrate, no menus, no faff
• Waterproof body — survives being dropped in the reservoir without dying
• Portable hand-held format — take it to every pot or reservoir in your setup
• Essential for any hydroponic or coco grow — pH out of range blocks nutrient uptake entirely

Who it's not for:

Important: if the probe is dry, soak in KCL storage solution for 24 hours before use — dry probes won't calibrate or read accurately (this is normal and doesn't mean the pen is faulty). Sold separately: pH 4 and pH 7 calibration solutions plus KCL storage solution — we stock all three. For permanent reservoir monitoring, the Bluelab Guardian wall-mount is better; for in-media reading (soil/coco root zone), the Multimedia pH Meter is better.

Available to collect from our Stone shop at Unit 24, Emerald Way, ST15 0SR — or ships the same working day from our UK warehouse. Not sure if this is the right fit? Give us a ring on 01785 556355 or email sales@roots2riches.com — we're growers ourselves, happy to help.