---
product_id: 38865430
title: "E-964-S50TB Multi-Frequency Single Photobeam Sensor; 4 selectable frequencies to reduce interference; Up to 50ft (15m) sensing distance; Replaced E-961-S50TB"
brand: "seco-larm"
price: "Bs.919"
currency: BOB
in_stock: true
reviews_count: 8
url: https://www.desertcart.bo/products/38865430-e-964-s50tb-multi-frequency-single-photobeam-sensor-4-selectable
store_origin: BO
region: Bolivia
---

# 50 ft detection range 4 selectable beam frequencies IP65 weatherproof rating E-964-S50TB Multi-Frequency Single Photobeam Sensor; 4 selectable frequencies to reduce interference; Up to 50ft (15m) sensing distance; Replaced E-961-S50TB

**Brand:** seco-larm
**Price:** Bs.919
**Availability:** ✅ In Stock

## Summary

> 🚨 Invisible shield, visible peace of mind.

## Quick Answers

- **What is this?** E-964-S50TB Multi-Frequency Single Photobeam Sensor; 4 selectable frequencies to reduce interference; Up to 50ft (15m) sensing distance; Replaced E-961-S50TB by seco-larm
- **How much does it cost?** Bs.919 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/38865430-e-964-s50tb-multi-frequency-single-photobeam-sensor-4-selectable)

## Best For

- seco-larm enthusiasts

## Why This Product

- Trusted seco-larm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Detection:** Up to 50 feet of invisible infrared beam coverage catches intruders instantly with a rapid 50ms interrupt speed.
- • **Smart Signal Control:** Built-in AGC filters out lighting disturbances, guaranteeing consistent alerts without false triggers.
- • **All-Weather Reliability:** IP65-rated weatherproof design ensures robust performance rain or shine, indoors or outdoors.
- • **Interference-Free Security:** Four selectable beam frequencies minimize cross-talk and false alarms for seamless multi-sensor setups.
- • **Easy Installation & Alignment:** Signal strength indicators and included mounting hardware make setup quick and precise—no guesswork needed.

## Overview

The Seco-Larm Enforcer E-964-S50TB is a professional-grade multi-frequency photobeam sensor offering up to 50 feet of invisible infrared detection. Featuring four selectable beam frequencies and built-in AGC control, it minimizes interference and false alarms. Its IP65 weatherproof rating ensures reliable indoor/outdoor use, while signal strength indicators simplify installation. Ideal for securing perimeters with fast, precise alerts that integrate seamlessly into existing alarm systems.

## Description

Ideal for setting up wide-coverage perimeter security that incorporates multiple pairs of beam sensors, the Seco-Larm Enforcer Multi-Frequency Single Photobeam Sensor (50 Ft.) allows you to choose from four different signal frequencies to reduce interference among units. This weatherproof sensor also features built-in AGC control to filter out lighting disturbances, further ensuring reliable operation without interference.The Photobeam Sensor consists of a transmitter and a receiver, which communicate with each other wirelessly. Mounted up to 50 feet across from each other, these two compact parts create an invisible infrared cross beam and detect any intruder that passes through the beam area. When the beam is broken, the sensor triggers an alert through your security system.Detection range up to 50 feet between transmitter and receiverFour selectable beam frequencies help reduce interferenceBuilt-in AGC control filters out lighting disturbancesWeatherproof for indoor/outdoor use (IP65)Signal strength indicator facilitates easy alignment when mountingInstallation DetailsDesigned for use with any alarm system that has traditional inputs, the beam receiver wires into your security control panel (not included) to relay alarm conditions to your system. Both the transmitter and receiver wire into a 10-24VDC power supply (sold separately). They are easy to mount to a wall or other flat surface with the included mounting screws and anchors. A signal strength indicator helps you achieve accurate alignment more easily. Additionally, LEDs indicate power, signal strength, and trigger.ContentsTransmitterReceiver(4) Screws(4) Plastic Wall AnchorsUser ManualNOTE: Power supply not included. Wires into a security system to provide alerts. For best operation, allow a minimum of 40 inches (1 meter) between the transmitter and receiver.Technical DetailsManufacturer Part #: E-964-S50TBUPC: 676544017158Color: BlackNumber of Beam Channels: Single infrared beamNumber of Beam Frequencies: 4Sensor Range: Up to 50 feet (15m)Infrared LED Wavelength: 940nmLED Beam Spread Angle: Approximately ± 10 degreesInterrupt Speed*: 50msInput Power: 10~24VDCCurrent Draw (max):Transmitter: 15mA at 12VDCReceiver: 30mA at 12VDCRelay Output: NO/NC relay (set by jumper, default is N.C.) 0.5A at 30VAC/VDCLED (Transmitter): Green – Indicates connected to powerLEDs (Receiver):Power (Green): Indicates connected to powerSignal (Yellow): Indicates receiver's signal is weak or beam is brokenAlarm (Red): Indicates transmitter and receiver are not aligned or beam is brokenIP Rating: IP65Operating Temperature: -13° to 131°F (-25° to 55°C)Maximum Humidity: 95 percentDimensions: 3-11/16 x 2-3/8 x 1-13/16 inches (94 x 60 x 46 mm)Weight: 2.6 ounces (74g)Warranty: 1 Year*This is the minimum time interval for breaking the beam which will trigger the output.

## Features

- Creates invisible beam that triggers alert when broken by someone passing through
- Four selectable beam frequencies help reduce interference
- Detection range up to 50 feet between transmitter and receiver
- Built-in AGC control filters out lighting disturbances
- Weatherproof for indoor/outdoor use (IP65)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Recommended Uses For Product | Garden, Terrace, Garage, Driveway, Sidewalk, Walkway |
| Power Source | Corded Electric |
| Maximum Range | 50 Feet |
| Mounting Type | Wall Mount |
| Item Weight | 2.56 ounces |
| Color | Black |

## Product Details

- **Brand:** Seco-Larm
- **Color:** Black
- **Power Source:** Corded Electric
- **Item Weight:** 2.56 ounces
- **Maximum Range:** 50 Feet

## Images

![E-964-S50TB Multi-Frequency Single Photobeam Sensor; 4 selectable frequencies to reduce interference; Up to 50ft (15m) sensing distance; Replaced E-961-S50TB - Image 1](https://m.media-amazon.com/images/I/51pBy3ieKES.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best compact unit for outside or inside.
*by K***S on April 15, 2020*

If you are handy or knowledgeable this is the ticket.This device is intended for someone with a little electrical or electronics background or just plain handy about gadgets. The description nowhere reads that it is a "Plug & Play" device. It is an interface device designed to be linked to an alarm horn, Flashing light or used to detect an object or person interrupting the beam to activate an alarm or stop a device such as stopping a garage door from closing on your vehicle or a person/child or can be used to turn on driveway path lights etc. There thousands of useful possibilities to use this photo beam sensor on.

### ⭐ FAAC replacement
*by D***E on May 18, 2020*

The media could not be loaded. Replaced FAAC with these. They came right online without issue. Be sure to place jumper in to NC (normally closed) position for this gate safety application. $28 for one side is a damn good value.Update: I liked the price of the unit in the ease of operation. However in my gate use application it lasted less than 90 days. I reached out directly to the manufacture and said the one of them burned up and I could smell it. They responded requesting more detail which we provided. Yet we never heard back from them again. Clearly this point I would suggest a better quality item for more money that will last more than 90 days

### ⭐⭐⭐⭐ Protects Cars from the Garage Door
*by S***N on November 10, 2022*

Like the other reviewer, I wanted to make sure my car won’t be hit by the garage door. Unlike him, I did not modify my current safety sensors with the relay output, but put an arrow LED on the wall that lights up if the car is not backed up enough. The reason I did not want to mess around with current sensors is if this product fails, I don’t have to worry about it changing the behavior of the original safety sensors.I did not put blue tapes on the lenses to make the beam narrower, but instead I rotated the hinges of the transmitter to about 40 degrees towards the inside of the garage. It made the beam narrower on the receiver side coming from sides of the transmitter lens. As other reviewer mentioned, the beam is quite wide for short distances like a two car garage. I also used aluminum DIN brackets on the wall so later I can move receiver and transmitter up or down based on any car or truck’s bumper height.I also like to point out that only the receiver has the relay output. Transmitter cannot control anything. It just has power. To open the black cover, put a flat screw driver on the slot on the bottom of the black cover not on the back. It looks like a small vent on the bottom. It took me 10 minutes to figure that out!Overall, it allows us to park the car 1-2 inches from the door which is perfect since we have cabinets in the back wall and this gives us as much space as is physically possible to walk behind the car. Thanks for reading, and YMMV.

## Frequently Bought Together

- Seco-Larm E-964-S50TB Multi-Frequency Single Photobeam Sensor; 4 selectable frequencies to reduce interference; Up to 50ft (15m) sensing distance; Replaced E-961-S50TB
- Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor with 35 Foot Range

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*Product available on Desertcart Bolivia*
*Store origin: BO*
*Last updated: 2026-02-25*