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pH Quality Assurance

At Micro Essential Laboratory, Inc., we pride ourselves on providing the highest quality products and services to our customers.  To ensure the accuracy of our Hydrion and pHydrion pH papers, we verify the calibration of each lot of pH paper and color charts using NIST traceable standards.

To maintain consistent results, please store our products at room temperature in dry conditions.  Please note the expiration date marked on the product.  If no expiration date is present, the shelf life is three years from the date of purchase.

If you have any questions related to our products or there application, please contact customer service at custserv@microessentiallab.com


Official Quality Control Certification

Official Quality Control Certification Spanish