Twin Photobeam with Laser Alignment, 390ft

Long Range Photobeam Detectors are easy-to-install with laser beam alignment and provide extended range. Designed to provide reliable perimeter security both indoors and outdoors. With the new E-964-D390Q, four selectable beam frequencies reduce interference between multiple units for enhanced perimeter protection.

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  • Built-in laser beam alignment system speeds accurate, reliable positioning
  • Twin infrared beams provide reliable perimeter security, minimizing false alarms from falling leaves, birds, etc.
  • Lensed optics reinforce beam strength & provide excellent immunity to false alarms due to rain, snow, mist, etc.
  • Weatherproof (IP55), sunlight-filtering case for indoor & outdoor use
  • Anti-frost system so that beam functions even in extreme conditions
  • Automatic input power filtering with special noise rejection circuitry
  • NC/NO alarm output
  • N.C. tamper circuit included
  • Non-polarized power inputs
  • Quick, easy installation with built-in laser beam alignment system
  • Interruption time adjustable for nearly all situations
Type Twin Photobeam Multi-Frequency Detectors with Laser Beam Alignment
Current Draw 88mA
Sensing Range Outdoor- 390′ (120m), Indoor- 790′ (240m)
Operating Voltage 10~30VAC / VDC (Non-polarized)
IP Rating Weatherproof  IP55
Interupt Speed 50msec~700msec (variable)
LEDs – Red Alarm LED ON: When transmitter and receiver are not aligned or when beam is broken
LEDs – Yellow Tuning LED (Receiver) ON: When receiver’s signal is weak or when beam is broken
LEDs – Green Operation LED (transmitter & receiver) ON: Indicates connected to power
Detection System Simultaneous break of 2 beams
Alarm Output NO/NC relay, 1A @ 120VAC, min. 1 sec
Tamper Output NC switch, 1A@120VAC
Case material PC Resin
Laser Wavelength 650nm
Operating Temperature -13º~+131º F (-25º~+55º C)
Laser Output Power <5mW
Alignment Angle Horizontal (+/-)90º, Vertical: (+/-)5º
Weight 2.5-lb (1.1kg)

Product Information Sheet (PI)


Situation Possible Issue Solution
Transmitter LED does not light. Incorrectly wired and/or insufficient voltage. Ensure the power supply to the transmitter is 12 to 24 VAC/VDC.
Receiver LED never lights up when the beam is interrupted. a. Insufficient voltage.
b. Beam reflected away from receiver.
c. Beams not simultaneously interrupted.
a. Double-check the voltage.
b. Clean the cover.
c. Check overall installation.
Beams interrupted and LED lights, but no alarm trigger. Alarm trigger cable may be cut, or the relay contact stuck due to overloading. Check the continuity of the wiring between the sensor and the alarm
Alarm LED continuously lit. a. Lenses out of alignment.
b. Beams are blocked.
c. Cover is foggy or dirty.
a. Realign the lenses.
b. Remove any obstacles.
c. Clean the cover.
Alarm trigger becomes
erratic in bad weather.
Lenses out of alignment. Check overall system installation.
If still erratic, realign the lenses.
Frequent false triggers from
leaves, birds, etc.
a. Too sensitive.
b. Bad location.
a. Reduce the response time.
b. Change the transmitter and/or location.

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