METER Water Activity Verification Salt Standards

Why use salt vials to verify a water activity meter?

Salt vials contain known, stable water activity values, allowing you to check that your meter is measuring accurately. They’re clean, easy to use, and eliminate errors from mixing your own solutions. Single-use vials reduce contamination and improve repeatability.

How do salt standards work?

Each vial contains a saturated salt solution that creates a predictable water activity value at a set temperature. By placing your water activity meter sensor over the vial, you can check if the meter reads the expected value. If not, recalibration or servicing may be needed.

What aw values are available in this kit?

The kit includes 50 disposable vials and offers a wide range of verification points: 0.150, 0.250, 0.500, 0.760, 0.920, 0.984, and 1.000 aw. These cover typical application ranges in food, pharma, and packaging QA.

How often should I verify my water activity meter?

It’s recommended to verify daily or weekly depending on use, and always before running a critical test. Regular verification ensures compliance with QA protocols, reduces measurement drift, and helps avoid costly quality issues.

Who uses salt standards in their QA workflow?

Salt verification standards are used by food manufacturers, pharmaceutical companies, R&D labs, and quality control teams who rely on accurate aw readings to ensure product stability, shelf life, and regulatory compliance.