Aqua Master Tools E300 Pro Substrate EC/Temp Meter - 0.0-19.9 mS/cm - 0-50°C

Check Substrate EC and Temperature On the Spot - Handheld Meter

Guessing at nutrient strength in a substrate leads to uneven feeding. This handheld meter reads EC and temperature in soft, moist substrate or liquid, so you can adjust before problems show. It resolves EC to 0.1 mS/cm and temperature to 0.1°C, and it compensates for temperature automatically.

Sold as a single unit, it suits hobbyists checking a few containers and regular indoor growers who monitor feed and runoff each week. Small teams can also keep one at each station.

Key Features & Benefits

• Wide EC range — reads 0.0 to 19.9 mS/cm, with stated accuracy of ± 2% F.S. across 0.0 to 4 mS/cm.
• One-point auto calibration — calibrates at 1.4 EC, with an indicator that confirms correct calibration.
• Automatic temperature compensation — keeps EC readings consistent from 0°C to 50°C.
• 90 cm electrode cord — lets you reach containers without moving the meter body.
• Water-resistant build — rated IP65, with IP67 electrodes.

Who Should Use E300 Pro Substrate EC/Temp Meter

Growers who manage nutrient strength in substrate or solution, from home gardeners to commercial cultivation teams, will find it useful for routine checks.

About Aqua Master Tools E300 Pro Substrate EC/Temp Meter

The E300 Pro is a handheld digital EC and temperature meter from Aqua Master Tools. It runs on 3 AG-13 button cell batteries (included), has a battery indicator, and powers off automatically after 8 minutes.

Frequently Asked Questions

Q: What does the E300 Pro measure?
A: It measures electrical conductivity (EC) and temperature. It works in soft, moist substrate or in liquid.

Q: How do I calibrate it?
A: It uses one-point automatic calibration at 1.4 EC. An indicator shows when calibration is correct.

Q: What is temperature compensation?
A: EC readings change with temperature. Automatic compensation adjusts the reading so results stay comparable across the 0°C to 50°C range.

Q: Does it come with batteries?
A: Yes. Three 1.5 V AG-13 button cell batteries are included. A battery indicator shows when power runs low.

Q: Can I use it near water?
A: The meter is rated IP65 and the electrodes IP67. That resists splashes, but you should still avoid submerging the meter body.

Q: How accurate is it?
A: EC accuracy is ± 2% F.S. from 0.0 to 4 mS/cm, and temperature accuracy is ±0.5°C.