Optical
Smoke Detector The optical smoke detector uses an
internal pulsing LED and a photo-diode at an obtuse
angle. In the event of smoke entering the chamber, the
light pulse from the LED will be scattered and
registered by the photo-diode. The detector will then
enter the alarm state and the indicator LED lights
up.
Integrating Optical Smoke Detector The
integrating optical smoke detector uses an internal
pulsing LED and a photo-diode at an obtuse angle. In the
event of smoke entering the chamber, the light pulse
from the LED will be scattered and registered by the
photo-diode. The detector will then enter the alarm
state and the indicator LED will light up.
The
detector also has the ability to monitor and discard the
transient sources of smoke (such as cigarette smoking in
restaurants) in order to reduce unwanted
alarms.
Heat
Detectors The heat detector operates by using a
matched pair of thermistors to sense heat. One
thermistor is exposed to the ambient temperature, the
other is sealed. In normal conditions, the two
thermistors register similar temperatures, but, on the
development of a fire, the temperature recorded by the
exposed thermistor will increase rapidly, resulting in
an imbalance of the thermistors and causing the detector
to change to the alarm state.
Manual
Call Point When operated, the manual call point
interrupts the polling cycle and can report its address
in under 0.2 seconds.
Alarm
Relay Module This device gives the user a
volt-free output that is triggered when the sounders are
active.
Sounder A low profile sounder that can
be mounted beneath a detector and base is available.
There are also versions that can be supplied as
stand-alone sounders with either a white or red
cap.
