Aqua Master Tools E300 Pro EC Electrode - Stainless Steel - Replacement for Substrate EC/Temp Meter E300 Pro

Replace a Worn EC Probe and Keep Measuring - Single Electrode

An EC meter is only as dependable as its electrode, and a worn probe leaves you guessing about nutrient strength. This replaceable stainless steel electrode fits the Substrate EC/Temp meter E300 Pro, so you renew the sensor instead of buying a whole new meter. Connect it, calibrate the meter, and return to measuring.

Sold as a single electrode, it suits growers who want a spare on the shelf or need to replace one that has reached the end of its life. It works for home gardeners and commercial teams who rely on the E300 Pro for routine checks during vegetative growth and flowering.

Key Features & Benefits

• Made for the E300 Pro — designed as a replacement for the Substrate EC/Temp meter E300 Pro.
• Stainless steel construction — a sturdy build that handles regular use in cultivation settings.
• Simple replacement — detach the PIN connector of the old electrode and connect the new one, with no tools described in the directions.
• Protective case storage — the electrode is best kept in its protective case with KCl storage solution between uses.

Who Should Use Aqua Master Tools E300 Pro EC Electrode

Anyone who owns an E300 Pro meter and needs a replacement or spare electrode. It suits indoor growers, hydroponic operators, and commercial cultivation teams that depend on regular EC readings.

About Aqua Master Tools E300 Pro EC Electrode

Aqua Master Tools makes this electrode as a replacement part for its Substrate EC/Temp meter E300 Pro. It is made of stainless steel, connects through a PIN connector, and is sold individually. A user manual and a how-to video cover the replacement steps.

Frequently Asked Questions

Q: Which meter does this electrode fit?
A: It is intended for the Substrate EC/Temp meter E300 Pro. Check that your meter is that model before ordering.

Q: How do I replace the electrode?
A: Detach the PIN connector of the old electrode from the meter, then connect the PIN connector of the new one. Calibrate the meter as described in the manual, and it is ready for use.

Q: Do I need to calibrate after fitting it?
A: Yes. Calibrate the meter after connecting the new electrode, following the instructions in the user manual.

Q: How should I store the electrode?
A: Store it in the protective case with KCl storage solution. This is the recommended storage method between uses.

Q: What does EC mean?
A: EC stands for electrical conductivity. It indicates the concentration of dissolved nutrients in a solution or substrate, which helps growers adjust feeding.

Q: Is the electrode durable?
A: It is stainless steel and built to be sturdy. Like any sensor, it is a wear part and will eventually need replacing.