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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
starting from 0% interest financing from /mo.

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Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
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Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
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  • Temperature Range 0 deg C to 50 deg C
  • IP65 waterproof meter with IP67 waterproof electrodes
  • View More Details

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  • Free Shipping On Most Items*To the lower 48
  • Transparent PricingBacked w/ price match guarantee
  • 4.8/5 Top Quality Store on Google
  • Secure CheckoutSSL encrypted payments

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Ask Sage about this product
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THROUGH THE Cultivator's LENS Product Evaluation

  • You are testing EC in soft substrates because standard reservoir dip pens cannot probe soil or coco without breaking
  • You are upgrading to a corded probe meter because holding the display separate from the testing point makes reading values easier

  • The 90cm cord connects the electrode to the meter, keeping the display in hand while testing.
  • A 1-point automatic calibration using EC 1413 calibration solution makes setup quick and consistent.
  • A replaceable EC electrode extends the meter's usable life well beyond a standard pen.

  • Growers testing soil and coco directly say the unbreakable probe design stopped the constant replacement cycle of fragile pens
  • Users tracking substrate EC with the 90cm cord say holding the meter comfortably in hand speeds up routine testing

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 standard combo 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 using EC 1413 calibration solution 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 EC 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. For pH monitoring in the same media, consider the S300 Pro 2 Substrate meter.

💪
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 E300 Pro EC 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?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

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