Long Range Photo Beam



Optex offers a less expensive and more efficient solution with SL-350QFR
Typical perimeter systems require expensive trenching or much time for installation.
Expensive wire conduit runs and concrete work is unnecessary, allowing installers to save time and money.

SL-350QFR – 4ch. beam frequencies selectable model


● Long distance 100m / 350ft.
● Wireless ready
● Weather protection IP65

● Long battery life 4 to 10years
● Sniper viewfinder with 2X magnification
● Spacious back box




Model SL-350QFR
Maximum detection range 100 m/350 ft.
Maximum arrival distance 1000 m/3500 ft.
Detection method Quad infrared beam interruption detection
Selectable beam frequency 4 channels
Interruption time Variable between 50/100/250/500 ms (4 steps)
Power source Recommend: 3.6 V, 13.0Ah
LSH20 lithium batteries manufactured by SAFT
Operating range: 3.2 V - 4.0 V lithium batteries 
Transmitter: 2 or 4 units, Receiver: 2 or 4 units
Current draw 745µA
Transmitter: 420 µA + Receiver: 325 µA (at 25°C, 3.6 VDC)
Battery life * ** Transmitter: Approx. 4 years
Receiver: Approx. 5 years
Output Alarm output Form C-Solid State Switch: 3.6 VDC, 0.01 A
Alarm period 2 sec (±1) (Nominal)
D.Q. output Form C-Solid State Switch: 3.6 VDC, 0.01 A
(Receiver only)
Low battery output N.C. (mechanical switch): 3.6 VDC, 0.01 A
Tamper output
(cover, back box,
main unit)
N.C. (contact output): 3.6 VDC, 0.01 A
Opens when cover, main unit or back box is removed.
Indicator Alarm Indicator
Alarm: ON
Light receiving: OFF
Level indicator
Not Light receiving: OFF
Light receiving: Flickering or OFF
Power ON: ON,
Power OFF: OFF
Low battery Voltage reduction: Flickering
Operating temperature -20°C - +60°C (-40°F - 140°F)
Operating humidity 95 % (max.)
Alignment angle ±90° Horizontal, ±10° Vertical
Dimension H x W x D mm(inch):
452 (17.9) x 83 (3.3) x 138 (5.4)
Weight 3300 g (Total weight of Transmitter + 
Receiver, excluding accessories)
International protection IP65

Specifications and design are subject to change without prior notice.
* The value is based on the condition that it is used within the ambient temperature range of 20 to 25°C. (LSH-20 x2 pcs)
** Using batteries other than those recommended may shorten the battery life.


Anti Bird Cap ABC-4
Keep birds and small animals off the detector to reduce false alarms. Stop rain and snow streaming in front of the detector to keep the sensitivity.
Back Cover BC-4
Conceal the back side of pole mounted detector.
Pole Side Cover PSC-4
Conceal the gap between two pole mounted detectors in back to back.
Beam Alignment Unit BAU-4
Align optical axis automatically. (applicable only to receiving units)
Extension Cable with Connector EC-4
Extension cables between the back box and the main unit when installing to the beam tower.

Cable length: 500 mm (19.7 inch)