Ampac Orbis, Product Manual, Page: 9 / 22

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MAN1509-4
ORBIS AUSTRALIAN PRODUCT GUIDE
6 Where to use multisensor smoke detectors
Multisensor smoke detectors are recognised as good detectors for general use but are additionally
more sensitive to fast burning, flaming fires (including liquid fires) than optical detectors.
They can be readily used instead of optical smoke detectors but should be used as the detector of
choice for areas where the fire risk is likely to include heat at an early stage in the development of
the fire.
As with Orbis optical smoke detectors the increased reliability of detection is combined with high
immunity to false alarms.
6.1 Orbis MultiSensor smoke detector
The MultiSensor smoke detector is a thermally enhanced smoke detector and as such will not give
an alarm from heat alone. It is a development of the Orbis optical detector described in the previous
chapter and goes further in its capabilities of fire detection.
6.2 How does the orbis multisensor detector work?
The optical sensor is identical to the one in the Orbis optical detector. Its sensitivity is, however,
influenced by a heat sensing element which makes the detector more responsive to fast-burning,
flaming fires.
It should be noted that the detector is a smoke detector. Although Orbis MultiSensor relies on both
smoke and heat sensors it is not possible to switch from smoke detection to heat detection.
6.3 Environmental performance
The environmental performance of the MultiSensor detector is the same as that of the Orbis optical
smoke detector.