--- product_id: 372019211 title: "Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1" brand: "chamberlain" price: "275.18 DT" currency: TND in_stock: true reviews_count: 13 category: "Chamberlain" url: https://www.desertcart.tn/products/372019211-chamberlain-820cb-replacement-garage-door-safety-sensor-2-pk-quantity store_origin: TN region: Tunisia --- # Instant auto-reverse on obstruction Universal Chamberlain compatibility Complete DIY install kit Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 **Brand:** chamberlain **Price:** 275.18 DT **Availability:** βœ… In Stock ## Summary > πŸšͺ Upgrade your garage safety with zero hassle and total confidence! ## Quick Answers - **What is this?** Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 by chamberlain - **How much does it cost?** 275.18 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/372019211-chamberlain-820cb-replacement-garage-door-safety-sensor-2-pk-quantity) ## 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 - β€’ **DIY Friendly Kit:** Includes sensors, brackets, extension wire & connectors for quick, hassle-free install - β€’ **Safety First, Always:** Automatically reverses garage door on any obstruction to prevent accidents - β€’ **Long-Term Reliability:** Durable build backed by UL certification and 1-year warranty for peace of mind - β€’ **Sunlight-Proof Design:** Low-profile sensors reduce misalignment and resist sunlight interference - β€’ **Seamless Compatibility:** Works flawlessly with Chamberlain, LiftMaster & Craftsman openers since 1997 ## Overview The Chamberlain 820CB Replacement Garage Door Safety Sensor 2-Pack offers universal compatibility with all Chamberlain garage door openers made after 1997. Designed with low-profile, sunlight-resistant sensors, it ensures automatic door reversal upon obstruction, enhancing safety. The kit includes everything needed for a straightforward DIY installation, saving time and costly service calls. Certified for quality and backed by a 1-year warranty, it’s the smart upgrade for reliable, accident-free garage door operation. ## 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 | #36,596 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #11 in Garage Door Sensors | | Brand | CHAMBERLAIN | | Brand Name | CHAMBERLAIN | | Customer Reviews | 4.6 out of 5 stars 785 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 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 | Metal | | Material Type | Metal | | Model | 820CB | | Mounting Type | Bracket | | Part Number | 820CB | | Style | Sensors | | Style Name | Sensors | | UPC | 012381197460 | | Unit Count | 1.0 Count | | Warranty Description | 1-year warranty | ## Product Details - **Brand:** CHAMBERLAIN - **Color:** Black - **Exterior Finish:** Black - **Installation Type:** Screw-In - **Material:** Metal ## Images ![Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 - Image 1](https://m.media-amazon.com/images/I/51dXnQ5v-SL.jpg) ![Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 - Image 2](https://m.media-amazon.com/images/I/51rsOjXthHL.jpg) ![Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 - Image 3](https://m.media-amazon.com/images/I/61vNkDmmLXL.jpg) ![Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 - Image 4](https://m.media-amazon.com/images/I/71-bVEhCJdL.jpg) ![Chamberlain 820CB Replacement Garage Door Safety Sensor, 2-Pk. - Quantity 1 - Image 5](https://m.media-amazon.com/images/I/61JuHHBRq3L.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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***N on August 4, 2023* ### ⭐⭐⭐⭐⭐ Review *by J***W on December 2, 2025* ### ⭐⭐⭐⭐⭐ Review *by L***Y on March 31, 2026* ## 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/372019211-chamberlain-820cb-replacement-garage-door-safety-sensor-2-pk-quantity](https://www.desertcart.tn/products/372019211-chamberlain-820cb-replacement-garage-door-safety-sensor-2-pk-quantity) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-07*