AquaMaster E300 Pro Substrate Pen - EC, temp

E300 Pro Substrate EC & Temp Meter – Reliable Root Zone Monitoring for Cannabis Cultivation

Measure EC & Temperature Directly in Your Growing Medium

The E300 Pro Substrate Meter is built for cannabis growers who need precise, no-fuss monitoring of electrical conductivity (EC) and temperature directly in their growing media. Whether you're growing in coco, soil, peat, or hydro substrates, this meter gives you an accurate picture of salt buildup, nutrient levels, and environmental conditions at the root zone.

Built Tough for Grow Room Use

• Dual Measurement: Get fast, reliable readings of EC and temperature in soft, moist substrates or liquids

• Ultra-Durable EC Electrode: Designed to withstand tough grow conditions—nearly unbreakable

• 90 cm Cable: Flexible probe cable lets you easily reach deep into pots or slabs

• Comfortable Handling: Rubberized ergonomic grip fits securely in your hand during testing

• 1-Point Auto Calibration: Quick and easy setup ensures consistent accuracy

• Replaceable Electrode: Swap out the probe as needed to extend the meter's life

• Batteries Included: Ready to use straight out of the box

Ideal for Cannabis Growers Using:

• Coco coir

• Living soil

• Soilless mixes

• Peat-based substrates

• Rockwool slabs and blocks

Monitoring EC at the root zone is crucial for cannabis plants—too high, and you risk salt stress; too low, and your plants may starve. The E300 Pro helps you fine-tune feeding schedules and avoid buildup before it becomes a problem.

Precision where it counts—at the roots.
The E300 Pro is your go-to EC & Temp meter for optimal cannabis performance.