[A set of check-up means for an automatic microplate photometer for immunologic studies]

The title set consists of six pairs of neutral filters with different optical density ranging from 0.03 to 1.5 B, a pair of filters made of colour yellow glass, and a holder having the same dimensions as the microplate and serving for the installation of the filters in the photometer checked. Every pair consists of two filters with identical optical parameters. The dimensions of the pair of filters allow covering all eight channels of the photometer simultaneously. The filters are certified with the error not more than +/- 0.003 B in the spectral range 360-700 nm. The yellow glass filter allows checking the dual wavelength mode of investigation.