SECO-LARM E-964-Q660Q Multi-Frequency Quad Thru-Photobeam Detector 660 ft. Outdoors, 1320 ft. Indoors
The SECO-LARM E-964-Q660Q is part of the ENFORCER E-964-Q quad photobeam family. It is designed for long-distance perimeter protection where a pair of beam towers needs to supervise an open span. Unlike a simple single-beam photo eye, the quad-beam design requires the four infrared beams to be broken together, which helps reduce false alarms from leaves, birds, and small animals passing through only part of the beam pattern.
This model is best used where the job calls for a dedicated security beam with reliable alignment features and a dry-contact relay output. The selectable frequency channels help when several beam sets are installed near each other along a fence line, driveway, yard, or commercial perimeter. Because range and reliability depend heavily on mounting height, post rigidity, sunlight angle, fog, rain, and alignment, the transmitter and receiver should be mounted securely and tested at the final gate or perimeter location.
Compatible With
- SECO-LARM E-964-Q series quad photobeam installations
- Perimeter security zones requiring simultaneous break of four infrared beams
- Gate, fence line, driveway, warehouse, loading dock, parking, and outdoor security detection where dry-contact alarm output is accepted
- Access-control or alarm panels accepting NO/NC relay input
- Multiple-beam installations using selectable beam frequencies to reduce crosstalk
- Related E-964-Q165Q, E-964-Q330Q, E-964-Q495Q, and E-964-Q660Q family references by range
Features and Specifications
| Manufacturer | SECO-LARM / ENFORCER |
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| Product Type | Multi-frequency quad infrared photobeam detector |
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| Part Number | E-964-Q660Q |
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| Outdoor Range | 660 ft (200 m) outdoor |
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| Indoor Range | 1320 ft (400 m) indoor |
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| Beam Design | Four simultaneous infrared beams |
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| Beam Frequencies | 4 selectable channels |
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| Operating Voltage | 12-24 VAC/VDC, non-polarized |
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| Interrupt Speed | Adjustable 50 ms to 700 ms |
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| Outputs | NO/NC alarm relay and NC tamper output |
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| Current Draw | Transmitter approx. 125 mA; receiver approx. 290 mA |
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| Application | Long-range perimeter security and dry-contact detection |
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Also Known As / Related Part Numbers
- E-964-Q660Q
- E964Q660Q
- ENFORCER E-964-Q660Q
- SECO-LARM E-964-Q660Q quad beam
- E-964-Q Series
- E-964-Q165Q related range model
- E-964-Q330Q related range model
- E-964-Q495Q related range model
- E-964-Q660Q related range model
Technician Note
For the best result, align the beam pair after the posts are fully secured, then test the relay output at the actual alarm panel, access controller, or gate input. Do not choose the range only by the maximum rating; outdoor conditions, post movement, sunlight, fog, and mounting height can reduce practical performance.
Before Ordering
- Match the required outdoor or indoor range to the job site.
- Confirm the controller accepts a dry-contact NO/NC alarm output.
- Confirm whether the job needs security detection or a monitored gate safety device.
- Check for multiple nearby beam sets that may require frequency selection.
- Verify power supply voltage and available current before installation.
Professional Advisory
Photobeam and curtain sensors should be installed, aligned, and tested by a qualified gate, door, or access-control technician when used around moving gates, overhead doors, maglocks, or perimeter security circuits. Do not bypass monitored safety devices or rely on a non-monitored alarm beam as an entrapment protection device unless the operator manual specifically allows that setup.
Product Questions
What is the difference between E-964-Q660Q and other E-964-Q models?
The main difference is rated range. E-964-Q660Q is the model for 660 ft (200 m) outdoor and 1320 ft (400 m) indoor; other E-964-Q models use the same general quad-beam family but are rated for different distances.
Why use a quad photobeam instead of a single beam?
A quad photobeam requires all four beams to be broken together, which helps reduce nuisance activation from small animals, birds, leaves, or brief partial beam interruptions.
Can this be used on a gate operator safety input?
Only if the gate operator manual and local requirements allow that device and wiring method. It is primarily a perimeter security photobeam, not a universal monitored UL 325 gate safety sensor.
What does the selectable frequency feature help with?
The four selectable channels help reduce crosstalk when multiple beam pairs are installed close to each other.
What should be checked before replacing an old beam with this model?
Check range, power, relay type, tamper circuit requirements, mounting space, beam height, and whether the old installation used a single, twin, or quad beam design.
