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AquaMaster Tools E300 Pro soil EC/temp meter with black body, blue LCD screen, and silver probe.
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Aqua Master Tools E300 Pro Substrate EC/Temp

Official Aqua Master Tools Dealer Model: AMT1035
$159.95 USD
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  • Measures EC range from 0.0 to 19.9 mS/cm with 0.1 mS/cm resolution.
  • Features a 90cm cord for direct contact testing in moist substrates.
  • Rated IP65 for the meter with waterproof IP67 electrodes.
  • View More Details

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THROUGH THE Cultivator's LENS Hands-On Evaluation

  • You are checking substrate conditions directly because you need accurate salt levels in the root zone.
  • You are moving away from handheld meters that fail because your current probe snapped during a routine test.

  • The 90cm lead is the real winner here because you can keep the display unit clean and dry while you work.
  • Replacing the electrode is straightforward and cheaper than buying a whole new unit every time you wear one out.

  • Users who switched to this model say they finally have consistent readings across different substrate types.
  • Producers who handle large batches mention that the rugged design holds up well during daily heavy use.

Aqua Master Tools E300 Pro Substrate EC/Temp

Testing EC in soil, coco, or any other soft, moist substrate isn't the same as dipping a pen into a reservoir — and a fragile probe makes it worse. The Aqua Master Tools E300 Pro solves both problems with an almost unbreakable EC electrode on a 90cm cord, letting you probe directly into substrate or liquid while holding the meter comfortably in hand.

A 1-point automatic calibration makes setup quick and consistent, and the ergonomic rubber back keeps the meter comfortable during extended use across agriculture, horticulture, and food industry applications. The E300 Pro ships with batteries included, and a replaceable electrode extends the meter's usable life well beyond a standard pen.

For long-term accuracy, store the meter with KCl storage solution in the protective cover.

Features

🌱
Direct Substrate Testing

Measures EC and temperature directly in soft, moist substrates or liquids.

💪
Nearly Unbreakable Electrode

A rugged EC electrode is built to withstand the wear of everyday substrate testing.

🔗
90cm Probe Cord

A 90cm cord connects the electrode to the meter, keeping the display in hand while testing.

🎯
1-Point Auto Calibration

Calibrates quickly at 1.4 EC for consistently accurate readings.

🔌
Replaceable Electrode

Swap the electrode instead of replacing the whole meter, extending its usable lifetime.

🔋
Battery Indicator

Displays battery status alongside automatic temperature compensation for reliable use.

What's Included

  • 1x E300 Pro Substrate EC/Temp Meter
  • 3x 1.5V AG-13 Button Cell Batteries

Specifications

Specification Value
EC Range 0.0 – 19.9 mS/cm
Temperature Range 0°C ~ 50°C (32°F ~ 122°F)
EC Resolution 0.1 mS/cm
Temperature Resolution 0.1°C (1.0°F)
EC Accuracy ± 2% F.S. (0.0 ~ 4 mS/cm)
Temperature Accuracy ± 0.5°C (32°F)
Temperature Compensation Range 0°C – 50°C (32°F – 122°F)
EC Calibration 1-point auto calibration, 1.4 EC
Power Supply 3 × 1.5V AG-13 Button Cell Batteries
Auto Power-Off After 8 minutes
Calibration Indicator Indicates correct calibration
Waterproof Rating IP65 (electrodes IP67 waterproof)
Meter Dimensions 220 × 40 × 40 mm
Weight 171 g
Package Dimensions 4.72 × 9.76 × 1.85 in

Video Tutorials

Frequently Asked Questions

Can this meter test directly in soil or coco? +

Yes, the E300 Pro is built for direct measurement in soft, moist substrates as well as liquids, across agriculture, horticulture, and food industry applications.

What makes the EC electrode different from other meters? +

The E300 Pro uses an almost unbreakable EC electrode, built to hold up to the repeated wear of everyday substrate testing.

How long is the probe cord? +

The EC electrode connects to the meter via a 90cm cord, letting you probe into substrate while holding the display comfortably in hand.

How do I calibrate the meter? +

The E300 Pro uses a 1-point auto calibration at 1.4 EC. Check the linked EC calibration video above for a full walkthrough.

Can I replace the electrode myself? +

Yes, the electrode is replaceable, extending the meter's lifetime. See the linked replacement video above for step-by-step instructions.

Does it come with batteries? +

Yes, the E300 Pro ships with 3 included 1.5V AG-13 button cell batteries, so it's ready to use right out of the box.

How should I store the meter between uses? +

Store it with KCl storage solution in the protective cover to help keep the electrode accurate over time.

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Questions About This Product?

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