Photain Controls
From Graces Guide
of Leatherhead.
1974 Manufactured five photoconductive cells with a peak spectral response at 7,000 angstroms, being more sensitive at the infra-red part of the spectrum.
See Also
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Grace's Guide To British Industrial History
Registered UK Charity (No. 1154342)Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,673 pages of information and 247,074 images on early companies, their products and the people who designed and built them.
Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.