Bluelab 2.77EC Conductivity Solution - 250 mL can improve the accuracy of your Bluelab meters. Using the reference solution, you can verify that your EC/ppm meter is reading correctly after cleaning the probe.
Bluelab's conductivity pens and meters are factory calibrated, so you don't have to recalibrate them, however, you do need to clean your probe and verify that it is reading accurately by using this 2.77 EC Conductivity Standard Solution.
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