1
ADVANCED ADAPTIVE PIR/MICROWAVE
TECHNOLOGY SENSORS
GEMC-BSLC-DT-L "DUAL TECH"
INSTALLATION INSTRUCTIONS
GENERAL DESCRIPTION
SPECIFICATIONS
General Coverage
with standard wide-angle lens, meas-
ured indoors at 68°F (20°C), typical: 50 feet long x 40 feet
wide; plus "Look-down" zone.
Operating Temperature:
14° to 122°F (-10° to +49°C)
Mounting:
Wall or corner, 6 - 9.8 feet (2 - 3m) maximum
Microwave Frequency:
10.525GHz ±25MHz
Dimensions
(HxWxD): 4.6 x 2.5 x 2.5" (11.7 x 6.35 x
6.35cm)
Shipping Weight:
.3
lb (4.8oz, 136g)
Electrical Ratings
Input Power:
13.6-16.3VDC supplied by model GEMC-
BSLC, 4mA.
Maximum Wiring Length:
2000' (#16 AWG). Refer to
GEMC-BSLC documentation for complete wiring infor-
mation. Unit shall be connected to model GEMC-BSLC
which is employed in the GEMC C-Series control panel
which is provided with a minimum of 4 hours standby on
battery power.
FEATURES
Microprocessor signal processing
Utilizes analog to digital signal conversion
System diagnostic electronics
Watchdog microprocessor supervision
Dual-element PIR sensor
High-efficiency, dirt-resistant grooves-in lens
"Look-down" zone
Extensive RFI and EMI filtering ensure optimum immunity
to false alarms
Large lens area assures high PIR sensitivity
Selectable microwave/PIR LED indication visible from
virtually any angle, extinguishable after testing.
Small size; modern, unobtrusive design
Silent operation
Bracket-free corner or wall mountable
Universal Swivel Bracket Kit available (not evaluated by
UL)
ORDERING INFORMATION
SVLBKT Swivel
Bracket
Kit
BASIC OPERATION
This unit is a combination passive-infrared (PIR) sensor and
microwave sensor, both contained in a single package. The
unit will go into alarm when both sensors detect intrusion at
the same time. The PIR section operates by detecting a
rapid change in temperature when an intruder crosses a
protected area. When a beam experiences a change in
heat (projected back through the lens), a pulse is generated
by the sensor element. The microwave transmitter sends
out short bursts of RF energy, and the receiver detects
changes in the returned signal caused by motion within its
coverage area.
The microwave section is unaffected by visible light, air
drafts, or temperature changes (as from space heaters or air
conditioners, for example), but is sensitive to motion. Strong
vibrations can be troublesome. Microwave signals may
pass through non-metallic walls and windows. Infrared is
virtually unaffected by vibration, and will not penetrate walls
or windows.
Thus the two technologies complement each other, and it is
the combination of the two that provides an inherent immun-
ity to false alarms. Dual technology is ideal for use in hostile
environments. Since both must trip to cause an alarm, in-
stallation is easier and requires less discipline.
DETECTION PATTERNS
Figure 1 illustrates maximum PIR and microwave detection
patterns superimposed on each other.
Fig. 1.
GEMC-BSLC-DT-L wide-angle lens patterns showing maximum
recommended coverage:
(a) top view;
(b) side view for 6' mounting height.
50'
40'
85°
(a)
PIR
MW
6'
PIR
MW
10'
20'
30'
40'
50
(b)
WI2071A\1 06/14
333 Bayview Avenue
Amityville, New York 11701
For Sales and Repairs, (800) 645-9445
For Technical Service, (800) 645-9440 or visit us at
http://tech.napcosecurity.com/
(Note: Technical Service is for security professionals only)
Publicly traded on NASDAQ Symbol: NSSC
© NAPCO 2014
