Aqua Master Pen Meter Replacement Electrodes - P50, E50 & P110

Bring Your Aqua Master Pen Back to Life with a Replacement Electrode

A tired electrode doesn't mean a new meter. These genuine Aqua Master replacement electrodes fit the P50, E50 and P110 pen meters, both the Pro and the newer Pro2, and are IP67 waterproof once fitted.

Why You Need It

Electrodes age. pH glass slows down as its reference liquid gets used up, and every sensor eventually stops holding a calibration. If your pen won't calibrate even with fresh batteries and fresh solution, or readings creep instead of settling, the electrode is usually the culprit.

Which Electrode Fits Your Pen?

P50 electrode (AMT1001)	P50 Pro and P50 Pro2 pH meters
E50 electrode (AMT1006)	E50 Pro and E50 Pro2 EC meters
P110 electrode (AMT1014)	P110 Pro and P110 Pro2 combo pens, combined pH and EC

How To Fit an Aqua Master Pen Electrode

1. Remove the old one: unscrew the sealing ring at the base of the meter and gently pull the old electrode out.
2. Fit the new one: line up the recess so the connectors meet properly, check the rubber seal is seated and tighten the ring firmly.
3. Soak pH electrodes: stand P50 and P110 electrodes in tap water for at least 12 hours before use.
4. Calibrate: calibrate the meter before taking readings.

Top tip: Make the new one last longer than the old one. Store P50 electrodes with a few drops of KCl storage solution in the cap, and never in RO or distilled water.

FAQs

There's white crust on my new pH electrode. Is it faulty?
No. Dried salts are normal and the 12-hour soak dissolves them.

Is there a warranty?
Yes, Aqua Master covers electrodes for six months against defects in materials and manufacture.

Need help choosing? Call our growing experts on 01782 749955 or visit One Stop Grow Shop Stoke at Fenton Trade Park.

Still on the old pen? Browse our full range of pH and EC meters.