Photain Controls: Difference between revisions
From Graces Guide
Created page with "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. ==..." |
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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. | 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. | ||
1974 Developed a new fire alarm control system that consisted of a control unit and a separate power pack to provide two separate alarm conditions - fault warning and fire warning.<ref>The Engineer 1974/05/30</ref> | |||
==See Also== | ==See Also== | ||
Latest revision as of 15:56, 15 January 2016
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.
1974 Developed a new fire alarm control system that consisted of a control unit and a separate power pack to provide two separate alarm conditions - fault warning and fire warning.[1]
See Also
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Sources of Information
- ↑ The Engineer 1974/05/30