The DD669 is a dual technology ceiling mount motion
sensor. It's 18 curtains offer maximum detection including
full undercrawl detection capability throughout a protected
area of up to 20m in diameter. The unique mirror optics
technology is a step and gliding focus, which creates
continuous curtains that never loses track of the intruder.
The DD669 features "4D signal processing" which makes
an effective discrimination between intruder and false alarm
signals. Recognizing the diversity in security applications,
the DD669 also features Bi-curtain processing for harsher
environments. The combination of mirror optics with 4D
signal processing not only provides better detection but
also increased stability and rejection of false alarms.
The DD669 sensors incorporate a unique radar technology
that is range controlled and operates on 5.8GHz frequency.
The range control means that no nuisance alarms are
generated for movements beyond the detection pattern.
The DD669 motion sensors can be flush mounted with
the optional accessory 360FM. The 360FM ensures a neat
integration in the ceiling, making only the top part of the