---
product_id: 184648445
title: "Twidec/1 Pair 0-20M Indoor Wall Mounted Photoelectric Beam Sensor NPN NO 18mm Photoelectric Sensor Switch Proximity Switch 2m line Length with Infrared Ray Beam E3F-20DNL-18"
brand: "twidec"
price: "₨21167"
currency: LKR
in_stock: true
reviews_count: 5
url: https://www.desertcart.lk/products/184648445-twidec-1-pair-0-20m-indoor-wall-mounted-photoelectric-beam
store_origin: LK
region: Sri Lanka
---

# 0-20m range 6-36V DC -25 to 55°C Twidec/1 Pair 0-20M Indoor Wall Mounted Photoelectric Beam Sensor NPN NO 18mm Photoelectric Sensor Switch Proximity Switch 2m line Length with Infrared Ray Beam E3F-20DNL-18

**Brand:** twidec
**Price:** ₨21167
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate Your Security Game!

## Quick Answers

- **What is this?** Twidec/1 Pair 0-20M Indoor Wall Mounted Photoelectric Beam Sensor NPN NO 18mm Photoelectric Sensor Switch Proximity Switch 2m line Length with Infrared Ray Beam E3F-20DNL-18 by twidec
- **How much does it cost?** ₨21167 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/184648445-twidec-1-pair-0-20m-indoor-wall-mounted-photoelectric-beam)

## Best For

- twidec enthusiasts

## Why This Product

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

## Key Features

- • **📏 Compact Design:** Sleek M18x70mm sensor head fits seamlessly into any environment.
- • **🌐 Versatile Usage:** Ideal for both indoor and outdoor applications, adapting to your needs.
- • **⚡ Quick Installation:** Includes mounting brackets for hassle-free setup.
- • **🔒 Secure Your Space:** Perfect for gates and garage doors, ensuring safety and convenience.
- • **🔍 Precision Detection:** Utilizes infrared technology for reliable sensing.

## Overview

The Twidec 0-20M Indoor Wall Mounted Photoelectric Beam Sensor is a high-performance proximity switch designed for versatile applications, including gates and garage doors. With a supply voltage of 6-36V DC and a sensory distance of up to 20 meters, this sensor ensures reliable detection in various environments. Its compact design and infrared technology make it an essential tool for enhancing security and convenience.

## Description

Photoelectric Switch control by infraredray, as a apporach sensor, includeing a transmitter and receiver in it. A retroreflective arrangement places the transmitter and receiver at the same location and uses a reflector to bounce the light beam back from the transmitter to the receiver. An object is sensed when the beam is interrupted and fails to reach the receiver.Can be applied in security system, manufacturing industry. Weatherproof (IP66) construction for indoor/outdoor usage.Safety sensor for garage doors or outdoor gates,Overhead door security sensor,Industrial automation, Detect small objects on manufacturing line,Entry detection for store fronts,Assist in measuring parking distance,Alarm sensor etc..

## Features

- This product is widely used in outdoors gates, garage doors for indoor/outdoor usage etc.
- Supply Voltage:6-36V DC;Type : NPN（normally open）;Wire Type : DC 3 Wire;Sensory Distance : 0-20m
- Sensor head dimention: M18x70mm;Cable Length : 200cm/78.7";Weight : 70g
- Sending Light : Infrared Rays;Color : Metal Thread;Working temperature: -25-55 degrees.
- Package Content: 1 Pair x Photoelectric Switch+2 x Mounting Bracket

## Images

![Twidec/1 Pair 0-20M Indoor Wall Mounted Photoelectric Beam Sensor NPN NO 18mm Photoelectric Sensor Switch Proximity Switch 2m line Length with Infrared Ray Beam E3F-20DNL-18 - Image 1](https://m.media-amazon.com/images/I/71hAT9A4HhL.jpg)

## Customer Reviews

### ⭐ High Failure Rate
*by A***R on January 31, 2024*

I ordered two of these Tx/Rx pairs. The first pair failed after two months. The transmitter had no output.I installed the spare transmitter, and then three months later the Receiver failed, indicating that the beam was constantly interrupted(which it wasn't). I replaced the Receiver, and the system was working again. After 6 months, this second Receiver quit. I did not buy any more of these items after the failure of one transmitter and two receivers in less that a year's time.Also, the output of the receiver is only a few hundred milliamps, so it really requires external voltage sensing circuit to drive a load larger than 200 mA.

### ⭐⭐⭐⭐⭐ Seems to work as parking sensor
*by D***E on July 12, 2021*

Purchase along with a 12 volt power supply and 12 volt LED strip.Wiring:12v+ > LED+12v+ > Both Brown Sensor Wires12v- > Both Blue Sensor WiresLED- > Black Sensor WireOperation:NO / When beam is broken (car parked), light is turned on

### ⭐ Garbage
*by J***D on September 23, 2023*

This thing smoked as soon as I energized.

## Frequently Bought Together

- Twidec/1 Pair 0-20M Indoor Wall Mounted Photoelectric Beam Sensor NPN NO 18mm Photoelectric Sensor Switch Proximity Switch 2m line Length with Infrared Ray Beam E3F-20DNL-18
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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-14*