1374 - Bausch & 1374 - Bausch &

Listing description

The Bausch and Lomb Spectronic 20 spectrophotometer is a line-operated single-beam instrument. Radiation from the source (a tungsten filament lamp) is dispersed by a replica grating, and the desired wavelength is focused upon an exit slit. The emergent beam passes through the cell compartment; that portion which is not absorbed is measured by a phototube. The response of the phototube is recorded in terms of transmittance (upper scale) or of absorbance (lower scale).

This equipment is located in CA