--- product_id: 295173968 title: "TD-20U Indoor/Outdoor Wireless Infrared Transmitter" brand: "optex" price: "€ 157.12" currency: EUR in_stock: true reviews_count: 5 category: "Optex" url: https://www.desertcart.it/products/295173968-td-20u-indoor-outdoor-wireless-infrared-transmitter store_origin: IT region: Italy --- # Selectable 50 ft or 17 ft detection 2000 ft wireless range IP54 weatherproof housing TD-20U Indoor/Outdoor Wireless Infrared Transmitter **Brand:** optex **Price:** € 157.12 **Availability:** βœ… In Stock ## Summary > 🚨 Stay ahead of threats with invisible, unstoppable motion detection ## Quick Answers - **What is this?** TD-20U Indoor/Outdoor Wireless Infrared Transmitter by optex - **How much does it cost?** € 157.12 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/295173968-td-20u-indoor-outdoor-wireless-infrared-transmitter) ## Best For - optex enthusiasts ## Why This Product - Trusted optex brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **All-Weather Durability:** IP54-rated housing ensures reliable performance rain or shine - β€’ **Effortless Integration:** Syncs flawlessly with Optex systems and smart home devices for automated lighting and security - β€’ **Long-Range Wireless Power:** Seamlessly covers up to 2000 ft for ultimate security reach - β€’ **Passive Infrared Precision:** Detects motion with pinpoint accuracy to trigger instant alerts - β€’ **Customizable Detection Zones:** Choose between 50 ft long-range or 17 ft wide fan pattern for tailored monitoring ## Overview The Optex TD-20U is a rugged indoor/outdoor wireless infrared transmitter boasting a 2000 ft transmission range and IP54 weatherproof rating. It uses passive infrared technology with selectable detection patterns (50 ft long-range or 17 ft wide fan) to reliably sense motion and send RF signals to compatible Optex receivers, enabling smart, automated security solutions for homes and businesses. ## Description Use the Optex TD-20U Indoor/Outdoor Wireless Infrared Transmitter enhance your Optex Wireless 2000 and 1000 systems. With a built-in infrared sensor, this wireless transmitter can send alarm signals up to 2,000 feet back to Optex receivers. The Optex T Review: This product works properly and is exactly as described Review: I use a number of these around the outside of my house to sense motion. They are powered by a 9 volt battery, which typically lasts from 9-12 months. I mount the TD-20U low to the ground on a plastic stake and use camouflage tape on them to hide them. I link them to an Optex RC-20U, and use it’s contact closure to feed an X10 Powerflash Interface, which is used in an ISY994i program. My floodlights and coach lights are on Insteon switches, and after dark when any motion is detected by an Optex RC-20U all these lights turn on. The sensors detect when deer, skunks or armadillos are in the yard. I also have one sensor pointed up the driveway, so if I return home after dark the whole exterior of my house is lit up. The Optex TD-20U also saved me from a possible home invasion. I have video surveillance cameras around the outside of my house, and they recorded the incident. At 1:55 AM, in July of 2019, a silver Impala drove into my driveway, and positioned the car next to my house. There were multiple men in this car, and their car windows were down. Within a few seconds of them passing the Optex sensor all my outside lights turned on. They were pretty well lit up. My cameras record video and audio. On the video one of the guys in the car said, β€œHey, the lights came on”. The driver of that vehicle put it in reverse, and got out of there pretty quickly. Quite possibly the lights coming on saved the lives of my wife and I. I have found these to be a very good product. I expect to always use these to guard my property. ## Features - 2000 ft. transmission range, line of sight - Uses passive infrared to detect motion and send RF signals to receivers - Weather proof housing (IP54 rating) for both indoor and outdoor use - Selectable 50 ft. Long Range or 17 ft. Fan (Wide) detection pattern ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003XKS826 | | Item model number | TD-20U | | Manufacturer | Optex | | Product Dimensions | 10.16 x 12.7 x 12.7 cm; 249.48 g | ## Images ![TD-20U Indoor/Outdoor Wireless Infrared Transmitter - Image 1](https://m.media-amazon.com/images/I/511K-Hjn2TL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by N***. on 1 February 2024* This product works properly and is exactly as described ### ⭐⭐⭐⭐⭐ Review *by J***. on 19 August 2020* I use a number of these around the outside of my house to sense motion. They are powered by a 9 volt battery, which typically lasts from 9-12 months. I mount the TD-20U low to the ground on a plastic stake and use camouflage tape on them to hide them. I link them to an Optex RC-20U, and use it’s contact closure to feed an X10 Powerflash Interface, which is used in an ISY994i program. My floodlights and coach lights are on Insteon switches, and after dark when any motion is detected by an Optex RC-20U all these lights turn on. The sensors detect when deer, skunks or armadillos are in the yard. I also have one sensor pointed up the driveway, so if I return home after dark the whole exterior of my house is lit up. The Optex TD-20U also saved me from a possible home invasion. I have video surveillance cameras around the outside of my house, and they recorded the incident. At 1:55 AM, in July of 2019, a silver Impala drove into my driveway, and positioned the car next to my house. There were multiple men in this car, and their car windows were down. Within a few seconds of them passing the Optex sensor all my outside lights turned on. They were pretty well lit up. My cameras record video and audio. On the video one of the guys in the car said, β€œHey, the lights came on”. The driver of that vehicle put it in reverse, and got out of there pretty quickly. Quite possibly the lights coming on saved the lives of my wife and I. I have found these to be a very good product. I expect to always use these to guard my property. ### ⭐⭐⭐⭐⭐ Review *by L***N on 12 January 2026* Easy to install, works great. --- ## 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.it/products/295173968-td-20u-indoor-outdoor-wireless-infrared-transmitter](https://www.desertcart.it/products/295173968-td-20u-indoor-outdoor-wireless-infrared-transmitter) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-11*