Bluelab Conductivity Standard Solution - 250ml - 2.77 EC

Lab-Grade 2.77 EC Calibration Reference, 250ml

A conductivity meter is only as trustworthy as its last calibration, and a known reference solution is the only way to confirm it is still reading accurately. Bluelab Conductivity Standard Solution is a lab-grade 2.77 EC reference used to calibrate conductivity, TDS, and PPM meters, giving growers a repeatable, known value to check a meter against.

This 250ml bottle provides enough solution for repeated calibration checks over the life of the bottle, rather than a single-use sachet.

Key Features & Benefits

• Lab-grade 2.77 EC reference — a known, repeatable value for calibration checks.
• 250ml bottle — enough solution for multiple calibration sessions rather than a single use.
• Works across conductivity, TDS, and PPM meters — a common reference point regardless of which scale a meter displays.
• Supports accurate nutrient dosing — confirms a meter is reading correctly before it is relied on for feed decisions.

Who Should Use This

Growers who own a conductivity, TDS, or PPM meter and want to verify or recalibrate it on a regular schedule using a known reference solution are the direct fit for this product.

About Bluelab Corporation

Bluelab, engineered and built in New Zealand for over three decades, manufactures pH, conductivity, and multi-parameter measurement tools for growers, supported by a global team across the US, Asia, Europe, and New Zealand.

Frequently Asked Questions

How often should I calibrate my conductivity meter?

A regular schedule, such as every few weeks depending on use, helps catch drift before it affects nutrient dosing decisions. Meters used daily in demanding conditions may need more frequent checks.

Can I use this solution on a meter that displays TDS or PPM instead of EC?

Yes, this 2.77 EC reference solution works as a calibration point across conductivity, TDS, and PPM display meters. Follow your specific meter's calibration procedure while using this solution as the reference.

How much solution is in this bottle?

This bottle contains 250ml of solution, enough for multiple calibration sessions over time rather than a single use. Store it sealed between uses to keep the reference value stable.

Is this the same solution included in the Bluelab Probe Care Kits?

The conductivity and combined Probe Care Kits include small single-use sachets of 2.77 EC solution, while this 250ml bottle is a larger supply for ongoing, repeated calibration. Choose this bottle if you calibrate frequently or want a longer-lasting supply on hand.