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A term used to describe the amount of light blocked out by smoke particles between the transmitter and receiver of an optical smoke sensing device.
This term describes a protocol that has been designed for compatibility with apparatus from other manufacturers of electronic equipment. See also 'closed protocol'.
To find out more, download our Protocols PIN sheet PDF by clicking here.
Optical Detector (Photoelectric - US)
A smoke detector using light scatter or obscuration techniques to detect smoke.
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Orbis is a range of conventional devices.
To find out more, visit the Orbis page.