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FAQ
Q: What is a PIR (Passive Infrared) Sensor?
A:
Passive InfraRed sensors (PIRs) are electronic devices which are used in some
security alarm systems to detect motion of an infrared emitting source, usually a human
body.
Radiation (energy) is invisible to the human eye but can be detected by electronic
devices designed for such a purpose.
The term 'passive' in this instance means the PIR does not emit any energy of any type
but merely sits 'passive' accepting infrared energy through the 'window' in its housing.
An intruder entering the protected area is detected when the infrared energy emitted
from the intruder's body is focused by a Fresnel lens or a mirror segment and overlaps a
section on the chip which had previously been looking at some much cooler part of the
protected area.
That portion of the chip is now much warmer than when the intruder wasn't there.
As the intruder moves, so does the hot spot on the surface of the chip.
This moving hot spot causes the electronics connected to the chip to de-energize the
relay, operating its contacts, thereby activating the detection input on the alarm control
panel.
Q: Is UV-C disinfection strictly line of sight?
A: Yes, it needs to shine on the surface to disinfect. It will not go around objects or
disinfect shadowed areas.
Q: Does UV-C light reflect off surfaces?
A: Yes, it reflects off many surfaces, but loses intensity dramatically if the surface is not
highly polished like the Stainless Steel center installed on our unit.
Q: Is the UV-C light I can see under the door dangerous?
A: Zero exposure to people is imperative so block it or protect your eyes and skin (please
note: 254nm UV-C wavelength is invisible, what is seen is visible light)
Содержание UV MAX Low Profile
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