SECO-LARM E-964-S65TB Mini Photobeam Sensor
The SECO-LARM E-964-S65TB is a mini single photobeam set used where the installer needs a compact through-beam sensor instead of a larger reflective or quad-beam unit. The transmitter and receiver face each other across the opening, and the relay changes state when the beam is fully blocked. Its small body makes it useful on posts, frames, narrow columns, interior openings, and access-control points where a full-size beam housing would be too bulky.
This sensor has several installer-friendly features: selectable frequencies for nearby beam pairs, wide input voltage, NO/NC output selection, signal strength indication for alignment, and IP55 weather resistance. For gate and garage applications, the key ordering issue is whether the operator requires a monitored safety input or whether a standard relay-output beam is acceptable for the intended function. It should be selected by range, power, output type, and installation environment, not by brand alone.
Compatible With
- SECO-LARM E-964-S65TB mini single photobeam sensor
- Access-control and alarm inputs accepting NO/NC dry contact
- Small indoor/outdoor doorways, gate posts, overhead door areas, service windows, and security openings
- Applications requiring up to 65 ft through-beam detection
- Multiple nearby beam installations using selectable frequencies
- Systems that can supply 12-24 VDC or 12-20 VAC to the sensor pair
Features and Specifications
| Manufacturer | SECO-LARM / ENFORCER |
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| Product Type | Mini single photobeam sensor |
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| Part Number | E-964-S65TB |
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| Sensing Range | Up to 65 ft (20 m) |
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| Number of Beams | 1 |
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| Beam Frequencies | 4 selectable frequencies |
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| Operating Voltage | 12-24 VDC or 12-20 VAC |
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| Response Time | 50 ms |
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| Output | Selectable NO/NC relay, 3A at 24 VDC |
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| Weather Rating | IP55 weatherproof |
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| Dimensions | 1-3/4 in x 3-3/4 in x 1-1/4 in each unit |
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| Application | Compact through-beam detection |
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Also Known As / Related Part Numbers
- E-964-S65TB
- E964S65TB
- SECO-LARM E-964-S65TB
- ENFORCER E-964-S65TB
- Mini photobeam sensor
- Mini single photobeam
- Related discontinued older model: E-964-S50TB
- Related photobeam family: E-960-D90Q
- Related photobeam family: E-931-S35RRQ
Technician Note
Use the signal strength indicator during setup and test the relay at the actual control board or panel. If several pairs are installed near each other, set different beam frequencies to reduce interference.
Before Ordering
- Confirm the required sensing distance is 65 ft or less.
- Confirm the control panel or operator accepts a standard NO/NC relay output.
- Check whether a monitored UL 325 photo eye is required instead of a standard relay beam.
- Confirm available power is 12-24 VDC or 12-20 VAC.
- Verify mounting space and alignment path between transmitter and receiver.
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
Is the E-964-S65TB reflective or through-beam?
It is a through-beam sensor with separate transmitter and receiver units facing each other across the opening.
What is the sensing range?
The listed sensing range is up to 65 ft under suitable installation conditions.
Why does it have selectable frequencies?
The four selectable frequencies help reduce interference when multiple beam pairs are installed near each other.
Can it be used outdoors?
Yes, it has an IP55 weatherproof rating, but it still needs proper mounting, aiming, and protection from physical damage.
Can this replace a monitored gate photo eye?
Only if the gate operator supports a standard relay-output beam for that function. Many modern operators require monitored safety devices, so the operator manual must be checked.
