Why do Lumiso Check Standards measure Percentage Transmission of Light?

Lumiso works like other photometers, by measuring the amount of light that passes through the sample in comparison to the blank. This is known as the “Percentage Transmission” or “%T”. This %T value is mathematically converted by the software to a mg/L concentration.

Therefore, to verify that the instrument is performing within calibration it is only necessary to check that the instrument measures correct values of %T at each wavelength of light it uses. If the instrument is reading the %T value correctly according to the certificate, the correct mg/L value will be displayed when testing.

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