Bluelab EC 2.77 Conductivity Standard Solution 250ml - Carton of 6

Confirm Your Nutrient Readings Are Right, 2.77 EC 250 ml x 6

Conductivity probes collect salt and mineral buildup, which causes EC readings to drift. Testing a probe in a solution of known conductivity shows whether it is reading correctly. Bluelab's 2.77 EC standard is the reference used to check and, where supported, calibrate its conductivity probes.

Six 250 ml bottles suit home growers and small teams who check conductivity probes regularly.

Key Features & Benefits

• Carton of 6 — six 250 ml bottles.
• Bluelab reference solution — for checking and calibrating conductivity (EC/ppm) probes.
• Longer probe life — regular calibration and care help pH and EC products last.
• Stock for the season — a carton keeps fresh solution on hand for routine maintenance.

Who Should Use Bluelab 2.77 EC solution

Growers who use Bluelab or other conductivity meters and want fresh solution for routine care, from home growers to commercial teams maintaining many probes.

About Bluelab 2.77 EC Conductivity Standard Solution

Bluelab makes its 2.77 EC Conductivity Standard Solution as part of its probe care range. Bluelab states there is no applicable warranty for solution products.

Frequently Asked Questions

What is a conductivity standard?

It is a solution with a known, fixed conductivity, here 2.77 EC. Measuring it shows whether your EC meter or probe reads accurately.

My meter does not need calibration. Why use a standard?

Even calibration-free probes can read wrong if dirty or damaged. A quick check in 2.77 EC standard confirms the reading; if it is off, clean the probe and test again.

Can I reuse the solution?

Pour what you need into a clean cup and discard it after use. Returning used solution to the bottle contaminates it.

What if my meter reads in ppm?

The standard has a fixed conductivity, so its ppm value depends on the scale your meter uses (ppm 500 or ppm 700). Check against the EC value or your meter's matching ppm figure.