---
product_id: 691399582
title: "820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1"
brand: "chamberlain"
price: "$U7607"
currency: UYU
in_stock: true
reviews_count: 5
category: "Chamberlain"
url: https://www.desertcart.uy/products/691399582-820cb-replacement-garage-door-safety-sensor-2-pk-quantity-1
store_origin: UY
region: Uruguay
---

# Instant automatic door reversal Low-profile design for durability Universal Chamberlain compatibility 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1

**Brand:** chamberlain
**Price:** $U7607
**Availability:** ✅ In Stock

## Summary

> 🚪 Elevate your garage safety game—because your home deserves the best!

## Quick Answers

- **What is this?** 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 by chamberlain
- **How much does it cost?** $U7607 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/691399582-820cb-replacement-garage-door-safety-sensor-2-pk-quantity-1)

## Best For

- chamberlain enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Durable design proven to withstand harsh conditions—no technician needed, just plug and play
- • **Safety First, Always:** Automatically reverses your garage door at the first sign of obstruction—protecting your home and loved ones
- • **Seamless Compatibility:** Works flawlessly with all Chamberlain openers post-1997 plus LiftMaster & Craftsman
- • **Sleek, Low-Profile Build:** Discreet sensors designed to resist misalignment and accidental damage
- • **Complete Installation Kit:** Includes 2 sensors, mounting brackets, 18-inch extension wire, and easy-to-follow manual for DIY setup

## Overview

The Chamberlain 820CB Replacement Garage Door Safety Sensor 2-Pack offers universal compatibility with Chamberlain, LiftMaster, and Craftsman openers made after 1997. Featuring a low-profile design to minimize misalignment risks, these sensors automatically reverse your garage door upon detecting obstructions, ensuring maximum safety. The package includes everything needed for a quick, hassle-free installation, making it the smart upgrade for any modern home.

## Description

The Replacement Safety Sensors project an invisible light beam across the inside of the garage door to prevent accidents and are required for safe use of all Chamberlain Garage Door Openers. Whenever there is an obstruction, the garage door will automatically reverse before causing any damage. Chamberlain compatible, these sensors replace defective or damaged sensors for every Chamberlain Garage Door Opener manufactured after 1997.

Review: Los sensores anteriores ya no funcionaban correctamente, decidí cambiarlos por estos, tengo motor chamberlain y funcionaron excelente, muy fácil la instalación sin necesidad de contratar técnico.
Review: Excellent replacement sensors. Better than the originals, these have been drowned multiple times and they are still kicking with absolutely no issue. They were very easy to install, just splice them in where the old ones were and the door opens and closes easy as pie. Worth every penny.

## Features

- For use with every Chamberlain garage door opener manufactured after 1997
- Enhanced troubleshooting, most intuitive safety reversing sensors
- Low profile reduces risk of being knocked out of alignment
- Whenever there is an obstruction, the garage door will automatically reverse
- Compatible with Chamberlain, LiftMaster and most Craftsman garage door openers
- Includes 2 sensors, mounting brackets, 18 inches of extension wire, instruction manual

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09GB6JHRR |
| Country of Origin | USA |
| Department | Unisex-Adult |
| Generic Name | Garage Door Safety Sensors |
| Global Trade Identification Number | 00012381197460 |
| Included Components | 2-sensors, mounting brackets, 18 in. of extension wire, instruction manual |
| Item Dimensions LxWxH | 5.3 x 2.9 x 3.1 Centimeters |
| Item Weight | 290 g |
| Item model number | 820CB |
| Manufacturer | CHAMBERLAIN CORP |
| Net Quantity | 1.0 Count |
| Number of Pieces | 2 |
| Product Dimensions | 5.28 x 2.9 x 3.15 cm; 290 g |
| Recommended Uses For Product | Preventing accidents and reversing garage doors upon obstruction |
| Size | Small |
| Specification Met | UL |
| UPC | 012381197460 |

## Product Details

- **Brand:** Chamberlain
- **Colour:** Black
- **Exterior Finish:** Black
- **Installation Type:** Screw-In
- **Material:** Metal

## Images

![820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 - Image 1](https://m.media-amazon.com/images/I/51dXnQ5v-SL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: remote open the door but wont close it  keep coming back up, but i can close it from the inside ,do you think this will solve the problem ?liftmast**
A: If you're able to close the door by holding down the button on the wall , then yes. However, it could be bad wiring ... maybe a bad connection. I see lots of time people use electrical tape and the adhesive actually breaks the connection over time. Try resplicing the connections if they are spliced first. If there is no splice, then it's possible the eyes are bad. To test them... use a newer 9volt battery. Detach both of the sensors and connect the matching wires together. Connect the wire with the black line to the positive side and the white to the negative. Line them so they are facing each other. If both lights come on then it's not the eyes. Could be a bad wire that is pinched or a bad circuit board on the motor unit. Good luck.

**Q: do these sensors come with wires attached to them ?**
A: 3 foot pigtails. You'll need to have wire from your opener to these and then splice them.

**Q: will they work for a craftsman opener ?**
A: Yes, I used my with a Craftsman and it worked perfect.

**Q: Could I use this sensor to light up a light when the sensor is activated?**
A: No. it has a circuit board in the door opening. It is not working like a switch but if the light is already on the garage door opener then that light will come on

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***E on 7 March 2022*

Los sensores anteriores ya no funcionaban correctamente, decidí cambiarlos por estos, tengo motor chamberlain y funcionaron excelente, muy fácil la instalación sin necesidad de contratar técnico.

### ⭐⭐⭐⭐⭐ Review
*by R***L on 22 December 2025*

Excellent replacement sensors. Better than the originals, these have been drowned multiple times and they are still kicking with absolutely no issue. They were very easy to install, just splice them in where the old ones were and the door opens and closes easy as pie. Worth every penny.

### ⭐⭐⭐⭐⭐ Review
*by S***4 on 4 April 2022*

Installs onto existing wire. Will require wire strippers for the install. Package provides 4 (+1 extra) crimp connectors for making the connection between the new sensors and the old cables. Old sensors were having some issues (backing up when nothing was there, not stopping when something was actually blocking the sensor). These seem to be more sensitive and accurate than the older sensors. I did not bother changing the mounting hardware and used the existing ones on the track. New LED indicators are much brighter and larger.

## Frequently Bought Together

- Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1
- 100 Feet Universal Garage Door Wire 2 Conductor Bell Wire Fits for Control Station/Sensors,24/2 AWG
- 41A5034 Safety Sensor Kit, Replacement for Craftsman/Chamberlain/Liftmaster Garage Door Sensor, Compatible with Liftmaster/Chamberlain/Craftsman Garage Door openers Made After 1997

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-11*