---
product_id: 1158950
title: "Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor with 35 Foot Range"
brand: "seco-larm"
price: "3489820₫"
currency: VND
in_stock: true
reviews_count: 7
category: "Seco Larm"
url: https://www.desertcart.vn/products/1158950-seco-larm-e-931-s35rrq-enforcer-indoor-outdoor-wall-mounted
store_origin: VN
region: Vietnam
---

# LED power & alignment indicators 35 ft adjustable range IP66 weatherproof build Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor with 35 Foot Range

**Brand:** seco-larm
**Price:** 3489820₫
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay one step ahead with invisible security that never sleeps!

## Quick Answers

- **What is this?** Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor with 35 Foot Range by seco-larm
- **How much does it cost?** 3489820₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/1158950-seco-larm-e-931-s35rrq-enforcer-indoor-outdoor-wall-mounted)

## 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

- • **All-Weather Durability:** Rugged IP66-rated enclosure ensures reliable performance rain or shine.
- • **Plug & Play Convenience:** Simple wall-mount installation with standard power outlet compatibility—no batteries needed.
- • **Precision Infrared Detection:** Invisible IR beam triggers alerts instantly for ultimate perimeter security.
- • **Customizable Sensing Distance:** Adjust detection range up to 35 feet to fit any indoor or outdoor setup.
- • **Versatile Security Applications:** Perfect for gates, driveways, garages, and more—protect your space with confidence.

## Overview

The Seco-Larm E-931-S35RRQ Enforcer is a wall-mounted photoelectric beam sensor featuring an adjustable 35-foot infrared detection range, housed in a weatherproof IP66 enclosure for reliable indoor/outdoor use. It includes LED indicators for power and alignment, plugs into standard outlets, and integrates seamlessly with existing alarm systems to secure entrances, driveways, and perimeters with rapid 10ms response time.

## Description

Monitor an entrance, secure a perimeter and more with the Seco-Larm Enforcer Reflective Beam Sensor with Square Reflector, 35'. The kit creates an invisible infrared beam and alerts you when the beam is broken by sounding your alarm (sold separately). The sensor is housed in a rugged, weatherproof enclosure for long-term reliability wherever you install it.Weatherproof construction for indoor or outdoor useAdjustable sensing distance up to 35 feetLED light indicates power statusPlugs into a standard power outletThis kit can be used for a variety of applications. Use it as an alarm to protect yourself from home intruders. Mount it in front of a driveway so you know when a car pulls up. You can even use the sensor as a parking indicator in your garage to help you park in the right spot.ContentsReflectorTransmitter/ReceiverSensor Mounting BracketReflector Mounting BracketMounting HardwareNOTE: Requires a security system or alarm device to alert you when activated.Technical DetailsMPN: E-931-S35RRUPC: 676544000495Type: Retro-Reflective Photoelectric SensorSensing Range: 0.5' to 35' (0.1 - 11 m)Voltage Supply: 12~240VDC or 24~240VACResponse Time: 10ms (max.)Light Source: IR LEDLEDs:Yellow LED (Alignment)Red LED (trigger)Trigger Output: SPDT Relay outputSwitching Capacity: 250VAC/1AEnclosure: IP 66 WeatherproofAmbient Temperature: -4°~131° F (-20°~55° C)Mounting Brackets for Sensor and Reflector: IncludedWarranty: 1 Year

Review: Reliable and easy to install, small reflector - Tested it indoors at up to 16m and it was working reliably, I ran out of more distance to test. But in the end I installed it for my swinging gate outdoors which is only about 6m and it was a breeze. Saved me from the hassle of replacing the old sensor’s batteries every few weeks. I have to say the reflector is pretty small (about the size of 3 fingers) so aiming is challenging but not too hard. Power the sensor, hold the reflector in your hand right in front of it, then slowly move to the other side while making the necessary adjustments and it should be fairly easy and quick.
Review: Very easy to setup - Very easy to setup. Install the transmitter, move the reflector around until the yellow light comes on. At a distance of 20 feet, the beam spread is about 1 square foot. Locate the reflector in the center. The reflectors can be tilted up to 45 degrees from the beam, but as long as they are in the center of the beam, they work. I installed 4 of these around my house and wired them in parallel. All 4 easily run off of an old laptop power supply. All 4 switched outputs are in parallel and run a 120db siren from the same power supply. I connected an off delay timer from Grainger to keep the siren going for a couple of minutes after the beam is tripped. These units work in daylight or darkness and do not falsely trigger. They are a great alternative to motion sensors which go off only at night and will trip at moving leaves and cats. I installed these at 4 feet high so animals will not trigger them.

## Features

- Creates an invisible infrared beam and alerts you when the beam is broken
- Weatherproof construction for indoor or outdoor use
- Adjustable sensing distance up to 35 feet
- LED light indicates power status
- Plugs into a standard power outlet

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001LFPB0M |
| Battery Description | Battery not included |
| Best Sellers Rank | #25,406 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Photoelectric Sensors |
| Brand | Seco-Larm |
| Color | Black |
| Compatible Devices | Garage Door Opener, Security System, Industrial Automation Equipment |
| Customer Reviews | 4.5 4.5 out of 5 stars (913) |
| Date First Available | November 17, 2008 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 11.2 ounces |
| Item model number | E-931-S35RRQ |
| Manufacturer | Seco-Larm |
| Maximum Range | 11 Meters |
| Mounting Type | Wall Mount |
| Operating Temperature | 55 Degrees Celsius |
| Power Source | Corded Electric |
| Product Dimensions | 5.75 x 3.5 x 2 inches |
| Recommended Uses For Product | Garage, Outdoors gates |
| UPC | 611138698559 676544000495 |

## Product Details

- **Brand:** Seco-Larm
- **Color:** Black
- **Item Weight:** 0.7 Pounds
- **Maximum Range:** 11 Meters
- **Power Source:** Corded Electric

## Images

![Seco-Larm E-931-S35RRQ Enforcer Indoor/Outdoor Wall Mounted Photoelectric Beam Sensor with 35 Foot Range - Image 1](https://m.media-amazon.com/images/I/61KCYbfh78L.jpg)

## Questions & Answers

**Q: Can I use this powered from my doorbell transformer and have it sound the alternate doorbell when tripped?**
A: You would need to determine the voltage that your doorbell transformer works at.  The sensor has 5 wires.  2 power the sensor, it is pretty versatile in the voltage that it works at, so chances are your doorbell transformer will be fine.  the last 3 are an single pole, double throw relay/contactor, with a normally open and normally closed output.  You will want to connect the normally open output to the doorbell, and the input to the door bell transformer.  Be aware that there is potential to burn out your doorbell.  Think about your doorbell, when you press the button, and electromagnet makes a striker hit a chime, and then when power is removed, a spring pushes it into a second chime.  If someone holds down that doorbell, you get a buzzing sound as the electromagnet is continuously working.  If you had this on your driveway, for example, and a car stopped in the beam, the same thing would happen as someone holding down your doorbell button.  It could also happen if a leaf fell into the beam and got stuck on the reflector...  Chances are this wont be a problem, but you wouldn't want it to happen while you aren't home.  There is a fire risk if that door bell magnet or transformer over heated.   Consider adding a timer to the circuit, that once it is powered, automatically opens the circuit until it is powered again.

**Q: Have Christmas display,, want to count the car that come through,  will this do the trick?  The cars willbe running 5 or 10 mph max**
A: The unit will close or open a set of contacts when the light beam is interrupted. If a counter is connected to the unit it will trigger the counter.

**Q: What does "dark on " mean ?   Does it only work at night ?**
A: When the light beam is broken the relay turns on.  This is "dark on" .  When the light beam is reflected back to the sensor the relay is off.  You can choose which contacts on the relay you want to use.

**Q: I am using it to sound an alarm when someone crosses the beam. Using a 12 volt battery. The device has 5 wires. Grey, blue, black, white,brown??**
A: Blue and brown are the power wires-polarity not important.  White is the common.  Grey is NC Black is NO.  IF the alarm circ,unit needs to be OPENED to sound, use the Grey wire. Usually, they are normally open and the circuit needs to be closed to sound, and the Black wirel is used.  Use White and one of the others k or Gray.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Reliable and easy to install, small reflector
*by A***. on May 17, 2025*

Tested it indoors at up to 16m and it was working reliably, I ran out of more distance to test. But in the end I installed it for my swinging gate outdoors which is only about 6m and it was a breeze. Saved me from the hassle of replacing the old sensor’s batteries every few weeks. I have to say the reflector is pretty small (about the size of 3 fingers) so aiming is challenging but not too hard. Power the sensor, hold the reflector in your hand right in front of it, then slowly move to the other side while making the necessary adjustments and it should be fairly easy and quick.

### ⭐⭐⭐⭐⭐ Very easy to setup
*by B***R on February 9, 2016*

Very easy to setup. Install the transmitter, move the reflector around until the yellow light comes on. At a distance of 20 feet, the beam spread is about 1 square foot. Locate the reflector in the center. The reflectors can be tilted up to 45 degrees from the beam, but as long as they are in the center of the beam, they work. I installed 4 of these around my house and wired them in parallel. All 4 easily run off of an old laptop power supply. All 4 switched outputs are in parallel and run a 120db siren from the same power supply. I connected an off delay timer from Grainger to keep the siren going for a couple of minutes after the beam is tripped. These units work in daylight or darkness and do not falsely trigger. They are a great alternative to motion sensors which go off only at night and will trip at moving leaves and cats. I installed these at 4 feet high so animals will not trigger them.

### ⭐⭐⭐⭐⭐ Worked perfectly. Well featured. Better than $150 lift master.
*by H***R on March 17, 2021*

Works perfectly for a distance of 22 feet - I didn’t try higher as that’s all I needed for my driveway. Smart techniques used in building this product. It has features to be used in variety of scenarios. It signals for any block immediately and you could use that signal for any purpose necessary. Mine was to secure people from my motorized gates - I wanted gates to stop from moving if any obstruction is found. My gates didn’t have the instructions to install this one but in 5 minutes trial and error we could figure out and worked great. My drive way has a bit of a slope that made it bit tricky to angle and place the emitter but worked out fine. I could have used some ways to adjust angles if it provided a hinge - but on second thought no hinge stays put for too long - so I am adding my own ways to tune it for my sloppy (literally) drive way - 15% gradient.

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-26*