Bluelab pH 7.0 Calibration Solution - 250ml

Lab-Grade pH 7.0 Calibration Reference, 250ml

Two-point pH calibration depends on two known reference values bracketing the working range, and Bluelab pH 7.0 Calibration Solution supplies one half of that pair. Manufactured to laboratory standards and formulated specifically for Bluelab pH meters, pens, and probes, this solution gives a repeatable reference point each time a probe is recalibrated.

This 250ml bottle holds enough solution for multiple calibration sessions, and pairs with the complementary pH solution to complete a standard two-point calibration routine.

Key Features & Benefits

• Lab-grade pH 7.0 reference — a precise calibration point for two-point pH calibration.
• Matched to Bluelab pH hardware — built to the tolerances Bluelab pH meters, pens, and probes expect.
• 250ml bottle — enough solution for multiple calibration sessions rather than a single use.
• Supports a routine calibration schedule — pair with the 30-day calibration indicator built into most Bluelab meters.

Who Should Use This

Growers who own a Bluelab pH meter, pen, or probe and follow a regular two-point calibration routine are the direct fit for this solution.

About Bluelab Corporation

Bluelab, engineered in New Zealand for more than three decades, formulates its calibration solutions specifically to match its own pH meter and probe lineup.

Frequently Asked Questions

How often should I calibrate my pH probe?

Bluelab recommends calibrating regularly, typically about every 30 days or whenever the calibration indicator on a Bluelab meter expires. Heavier daily use may call for more frequent checks.

What other solution do I need alongside this pH 7.0 solution?

A two-point calibration needs a second reference point; pair pH 4.0 solution with this pH 7.0 solution to bracket your working range. Some growers use pH 10.0 instead of pH 4.0 for higher-range work.

How should I store this solution?

Keep the bottle sealed and away from direct sunlight or heat sources between calibration sessions. Storing it this way keeps the reference value stable and out of reach of children.

Can I use this solution with a non-Bluelab meter?

This solution is made to match Bluelab pH hardware specifically, though it is manufactured to general laboratory standards. For guaranteed calibration accuracy, Bluelab recommends pairing it with Bluelab meters, pens, and probes.