EC meters and testing kits for hydroponic growing
EC meters and testing kits measure the electrical conductivity of your hydroponic nutrient solution, which indicates how concentrated the feed is. Unlike pH, which shows nutrient balance, EC shows nutrient strength. A-Grade Hydroponics stocks digital EC meters, including the Apera EC60 portable pocket EC/TDS/salinity meter, for daily nutrient monitoring.
Why EC monitoring matters
Pure water doesn't conduct electricity, but dissolved nutrients do — so EC readings rise and fall with nutrient concentration. Feeding too weak starves your plants of nutrients, while feeding too strong can burn roots and cause nutrient lockout, even with a correctly formulated nutrient solution. Checking EC daily lets you catch drift from evaporation or top-ups before it throws off your feed schedule, keeping your plants in the sweet spot for their growth stage.
What's in this collection
Digital EC meters — pen-style meters for fast conductivity readings
EC/TDS/salinity combo meters — such as the Apera EC60 pocket meter, reading multiple measurements at once
EC testing kits — simple kits for manual conductivity checks
Waterproof and pocket EC meters — durable options for tank-side testing
How to choose an EC meter or kit
EC vs. TDS vs. PPM
EC, TDS and PPM all describe nutrient concentration, but they're measured and displayed differently depending on the meter and conversion scale used. A combo meter like the Apera EC60 reads EC, TDS and salinity together, so you can check whichever unit your feed chart uses without switching devices.
How often to check
Checking EC daily is the standard recommendation, especially in reservoir-based systems where evaporation concentrates the solution over time and top-ups dilute it again. More frequent checks matter more in hot weather or fast-growing crops that drink heavily.
Getting started
If you're just starting out, a simple pocket EC meter is enough to follow most feed charts accurately — you don't need a lab-grade meter to keep your nutrient strength on track.
Shop EC meters and kits at A-Grade Hydroponics
A-Grade Hydroponics stocks EC meters and testing kits for home growers and commercial operations alike, including the Apera EC60 pocket meter. Shop the range below, or get in touch with our Melbourne-based team if you need help choosing the right meter for your system.
