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.
| Manufacturer | SECO-LARM / ENFORCER |
|---|---|
| Product Type | Mini single photobeam sensor |
| Part Number | E-964-S65TB |
| Sensing Range | Up to 65 ft (20 m) |
| Number of Beams | 1 |
| Beam Frequencies | 4 selectable frequencies |
| Operating Voltage | 12-24 VDC or 12-20 VAC |
| Response Time | 50 ms |
| Output | Selectable NO/NC relay, 3A at 24 VDC |
| Weather Rating | IP55 weatherproof |
| Dimensions | 1-3/4 in x 3-3/4 in x 1-1/4 in each unit |
| Application | Compact through-beam detection |
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.
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.
It is a through-beam sensor with separate transmitter and receiver units facing each other across the opening.
The listed sensing range is up to 65 ft under suitable installation conditions.
The four selectable frequencies help reduce interference when multiple beam pairs are installed near each other.
Yes, it has an IP55 weatherproof rating, but it still needs proper mounting, aiming, and protection from physical damage.
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.