---
product_id: 372019211
title: "820CB Garage Door Safety Sensor Replacement, 2-Pack"
brand: "chamberlain"
price: "€ 79.45"
currency: EUR
in_stock: true
category: "Chamberlain"
url: https://www.desertcart.fr/products/372019211-820cb-garage-door-safety-sensor-replacement-2-pack
store_origin: FR
region: France
---

# Low-profile design minimizes misalignment Universal compatibility post-1997 Auto-reverse on obstruction for safety 820CB Garage Door Safety Sensor Replacement, 2-Pack

**Brand:** chamberlain
**Price:** € 79.45
**Availability:** ✅ In Stock

## Summary

> 🚪 Upgrade your garage safety game—because peace of mind never goes out of style!

## Quick Answers

- **What is this?** 820CB Garage Door Safety Sensor Replacement, 2-Pack by chamberlain
- **How much does it cost?** € 79.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/372019211-820cb-garage-door-safety-sensor-replacement-2-pack)

## 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

- • **Trusted Reliability:** Backed by a 1-year warranty and 4.6-star rating from over 800 users—join the safety-savvy community.
- • **Safety First, Always:** Instant automatic reversal on any obstruction—protect your family and belongings effortlessly.
- • **Seamless Compatibility:** Fits all Chamberlain, LiftMaster & Craftsman openers made after 1997—upgrade without hassle.
- • **Sleek Low-Profile Design:** Discreet sensors reduce accidental knocks and keep your garage door system flawlessly aligned.
- • **Complete Installation Kit:** Includes 2 sensors, mounting brackets, 18-inch extension wire, and clear instructions for a smooth setup.

## Overview

The Chamberlain 820CB Garage Door Safety Sensor Replacement 2-Pack ensures your garage door automatically reverses upon obstruction, enhancing safety for all Chamberlain, LiftMaster, and most Craftsman openers made after 1997. Featuring a low-profile design to prevent misalignment, this kit includes sensors, mounting brackets, and extension wire for easy installation, backed by a 1-year warranty and trusted by thousands.

## 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.

## 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 |
| Best Sellers Rank | #30,427 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #12 in Garage Door Sensors |
| Brand | CHAMBERLAIN |
| Brand Name | CHAMBERLAIN |
| Customer Reviews | 4.6 out of 5 stars 814 Reviews |
| Global Trade Identification Number | 00012381197460 |
| Included Components | 2-sensors, mounting brackets, 18 in. of extension wire, instruction manual |
| Item Dimensions | 3.13 x 4.5 x 6.5 inches |
| Item Highlight | Works with all garage openers made after 1997, Includes brackets and 18 in wire, Auto-reverses on obstruction |
| Item Type Name | Garage Door Safety Sensors |
| Item dimensions L x W x H | 3.13 x 4.5 x 6.5 inches |
| Manufacturer | CHAMBERLAIN CORP |
| Material | Plastic |
| Material Type | Plastic |
| Model | 820CB |
| Number of Items | 1 |
| Part Number | 820CB |
| Style | Sensors |
| Style Name | Sensors |
| UPC | 012381197460 |
| Unit Count | 1 Count |
| Warranty Description | 1-year warranty |

## Product Details

- **Brand:** CHAMBERLAIN
- **Item dimensions L x W x H:** 3.13 x 4.5 x 6.5 inches
- **Material:** Plastic
- **Mounting Type:** Bracket
- **Style:** Sensors

## Images

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

## Available Options

This product comes in different **Size, Style** 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

## 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 France*
*Store origin: FR*
*Last updated: 2026-09-16*