Bluelab 2.77EC Conductivity Solution 250 ml (6/Cs)

Bluelab 2.77EC Conductivity Solution 250 ml — EC/PPM Probe Verification Reference Solution

The Bluelab® 2.77EC Conductivity Solution 250 ml is a precision reference solution for verifying the accuracy of EC (electrical conductivity) and PPM probes after cleaning. Accurate EC readings are fundamental to hydroponic nutrient management — even small errors in conductivity measurement can lead to over- or under-feeding your crop, with direct consequences for yield and plant health.

EC probes do not require traditional calibration like pH probes. Instead, they are verified against a known reference solution to confirm the probe is clean and reading correctly. The 2.77 EC value is a widely recognized standard reference point used across the hydroponic and controlled-environment agriculture (CEA) industry. If your probe reads outside the expected range when tested against this solution, it signals the probe needs further cleaning or may be due for replacement.

Manufactured to laboratory standards and compatible with all Bluelab EC and PPM meters, the 250 ml format is well-suited for smaller operations or growers with one or two instruments. Sold in cases of 6 for convenient restocking. Store in a cool place out of direct sunlight and heat, with lids securely tightened. Keep out of reach of children.

Key Features

• 2.77 EC reference solution for conductivity probe verification
• Confirms EC/PPM probe cleanliness and accuracy after cleaning
• Manufactured to laboratory standards
• Compatible with all Bluelab EC and PPM meters
• 250 ml per bottle — sold in cases of 6
• Store in a cool, dark place with lid tightly sealed; keep out of reach of children

Frequently Asked Questions

What is Bluelab 2.77EC Conductivity Solution and how do I use it?

The Bluelab 2.77EC Conductivity Solution is a reference solution used to verify the accuracy of EC and PPM probes. After cleaning your probe, dip it into the 2.77EC solution and check the reading on your meter. If the reading matches 2.77 EC (or the equivalent PPM value for your scale), the probe is clean and accurate. A reading that deviates significantly from 2.77 EC indicates the probe needs further cleaning or may need to be replaced. This verification step should be performed after every cleaning and any time you suspect an inaccurate reading.

Do EC probes need to be calibrated like pH probes?

No. EC probes are factory-calibrated and do not require the same regular calibration routine as pH probes. Instead, EC probe accuracy is maintained through regular cleaning and verification against a known reference solution like the Bluelab 2.77EC Conductivity Solution. If the probe reads correctly against the reference solution after cleaning, no further action is needed. If it reads outside the expected range, cleaning should be repeated or the probe should be inspected for damage.

What is the difference between the 250 ml and 500 ml conductivity solution?

Both formats contain the same Bluelab® 2.77EC Conductivity Solution to the same laboratory standards. The 250 ml bottle is ideal for smaller operations or growers with one or two EC instruments, while the 500 ml format is more economical for commercial facilities that verify multiple probes frequently. Both are sold in cases of 6.

Is Bluelab 2.77EC Conductivity Solution compatible with other brands of EC meters?

Yes. The Bluelab 2.77EC Conductivity Solution is a standard conductivity reference solution manufactured to laboratory standards and is compatible with most EC and PPM meters that use a 2.77 EC reference point for probe verification. Always confirm the expected reference value for your specific instrument before use.

Where can I buy Bluelab 2.77EC Conductivity Solution 250 ml?

Bluelab 2.77EC Conductivity Solution (250 ml, case of 6) is available through Seres Ag, a professional hydroponic and CEA equipment supplier serving growers across the United States. Purchase directly at seresag.com. Seres Ag offers competitive pricing on Bluelab consumables, expert support, and US-wide shipping. For wholesale or bulk orders, contact the Seres Ag team through the website.