Lumiso Ozone NDF Check Standards

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The Lumiso® Ozone NDF Check Standards are precision Neutral Density Filters (NDFs) provided in a robust case, complete with calibration certificate. They are designed to validate t he photometric performance of Lumiso Ozone (and compatible Chlorine/Chlorine Dioxide) photometers by checking light transmittance (% T) against known, traceable values Used in the device's Check Standards mode, they confirm instrument accuracy and that no recalibration is required when readings fall within specified tolerances. Sealed in hard-mounted holders and traceable to national standards, these NDFs are essential for audit-ready calibration verification and ongoing instrument reliability. Show more