Aqua Master Tools P110 Pro2 combo pen pH, EC and temperature

Measure pH, EC and temperature of your nutrient solution with one pen. Waterproof, floats, and the electrode can be replaced when it wears out.

The Aqua Master Tools P110 Pro2 is the pen for growers who don't want to juggle two meters. Dip it in your nutrient solution and read pH and EC, with the temperature alongside. The display is black with white figures and you choose one or two decimals.

What's new in the Pro2

• AAA batteries instead of button cells: cheaper and available everywhere.
• Black display with white figures, easier to read over a dark reservoir.
• One or two decimals, your choice.
• Calibration reminder after 30 days, so you don't forget to recalibrate.

Calibration: pH always, EC as you like

The pH side calibrates automatically at two points, pH 7.0 and pH 4.0. Do this regularly, because a pH electrode drifts slowly. The EC side is calibrated manually, with any EC calibration solution. After a successful calibration an indicator appears that disappears after 30 days: your cue to calibrate again.

An electrode you replace on its own

A pH electrode wears out, however well you look after it. On the P110 Pro2 you unscrew the electrode and fit a new one, so you don't have to replace the whole pen. Keep the pH side moist with KCl storage solution in the cap. Dried salt crystals around the electrode are normal and not a sign of a fault.

Technical specifications:

• Range: pH 0.1 to 14.00 · EC 0.0 to 19.99 mS/cm · temperature 0 to 50 °C
• Resolution: pH 0.01 or 0.1 · EC 0.01 or 0.1 mS/cm · temperature 0.1 °C
• Accuracy: pH ± 0.1 · EC ± 2% F.S. · temperature ± 0.5 °C
• Calibration: pH automatic, 2 points (4.0 and 7.0) · EC manual, any EC solution
• Temperature compensation: automatic, 0 to 50 °C
• Waterproof: IP67, floats
• Power: 2 x 1.5 V AAA (included)
• Auto power-off: after 8 minutes
• Weight: 132 grams

Frequently asked questions

Should I calibrate the pen before first use?
Yes, we recommend it. Follow the steps in the manual, and calibrate regularly after that: the pen reminds you after 30 days.

Which EC calibration solution do I need?
Any EC calibration solution works, because the EC side is set manually. EC 1413 µS/cm (1.41 mS/cm) is the most common.

What if the electrode stops measuring properly?
Then you replace only the electrode. We stock the P110 Pro electrode (AMT1014) separately.