Aqua Master Tools E50 Pro2 EC meter with temperature

Measure the strength of your nutrient solution, plus the temperature. Waterproof, floats, and the electrode can be replaced on its own.

The Aqua Master Tools E50 Pro2 measures the conductivity (EC) of your water from 0.00 to 19.99 mS/cm. It tells you how much feed is in your reservoir, so you don't top up by guesswork. You read one or two decimals on a black display with white figures.

What's new in the Pro2

• AAA batteries instead of button cells.
• Black display with white figures, easier to read.
• One or two decimals, your choice.
• Calibration reminder after 30 days.

What EC does and doesn't tell you

EC measures how well your water conducts electricity. Dissolved nutrient salts raise that conductivity, so the higher the EC, the stronger your solution. The meter can't see which nutrients are in there: it adds up everything that conducts, including what was already in your tap water. So measure your tap water first and you'll know your starting point.

Technical specifications:

• Range: EC 0.00 to 19.99 mS/cm · temperature 0 to 50 °C
• Resolution: EC 0.01 or 0.1 mS/cm · temperature 0.1 °C
• Accuracy: EC ± 2% · temperature ± 1 °C
• Calibration: manual, with any EC calibration solution
• Temperature compensation: automatic, 0 to 50 °C
• Waterproof: IP67
• Power: 2 x 1.5 V AAA (included)
• Auto power-off: after 8 minutes
• Dimensions: 230 x 43 x 43 mm
• Weight: 132 grams

Frequently asked questions

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

What's the difference with the E60 Pro2?
The E60 Pro2 also shows TDS and ppm alongside EC. If you work in EC, the E50 Pro2 is all you need.

Does it measure pH?
No. For that there's the P50 Pro2, or the P110 Pro2 which measures pH and EC in one pen.