The model 3211 series is a diffused Photometric sensor designed to meet CIE 127 requirements, with a precision aperture / filter / diffuser combination that delivers a CIE V (λ) f1′ < 2.0%. These products are ideally suited for LED measurement applications per CIE 127 condition A & B, including luminous intensity and cd. The matched photometric filter and cosine diffuser lowers the error in spectral matching, particularly in the blue and violet portion of the spectrum.  The integrated cosine filter significantly reduces directional sensitivity for ease of use.

Our wide range of optical power meters, photometric and radiometric sensors is complemented by ISO/IEC 17025 accreditation by NVLAP (NVLAP lab code 200823-0), resulting in unmatched performance and custom configuration as required.