HydroAxis PH Pen

HydroAxis PH Pen


Ph testers and Ph probes stand as sensitive scientific equipment demanding extra care and maintenance for accurate readings, measurements, and valid warranties from the user (you).

Recognizing Ph testers (without replaceable probes) and Ph probes as consumable items, being electrical sensors, replacement becomes essential over time, akin to media, nutrients, etc. Keep in mind that Probes and Pens (without replaceable probes) carry a 6-month warranty from the date of purchase, and this warranty won't be honored without a valid purchase receipt.

While with proper care, Probes and Pens can last for years, it's crucial to note that being a live charge in the electrode, their lifespan may extend from 6 months. This is especially true if correct care procedures have not been maintained. Hydroponic nutrients, in particular, expedite the degradation of Ph probes more than other disciplines.

For effective use, probes must always be rehydrated before storage, and a dedicated storage solution, available for purchase in-store, is recommended. Probes should be stored in the solution when not in use, with the exception of in-tank monitors.


To ensure the longevity and optimal performance of your Ph instruments, carefully read the entire contents of the booklets and handouts provided with them.