Irradiance

Transmittance Densitometers

NATA class of test 1.65.08

ORLAB is NATA accredited for calibration of transmittance densitometers including vertical light path photometers

Least uncertainty of measurement vary depending on wavelength band, method used and value of transmittance

These measurements are used to characterise filters for calibrating spectrophotometers, transmittance densitometers etc and also for measuring products such as protective filers and window glass

Based on filters calibrated by the National Research Council of Canada.