--- product_id: 87822343 title: "SYSTEM SENSOR CO1224T 12/24 volt, 4-wire, system-monitored C02 carbon monoxide detector w/ RealTest Technology" brand: "system sensor" price: "€ 185.28" currency: EUR in_stock: false reviews_count: 8 url: https://www.desertcart.fr/products/87822343-system-sensor-co1224t-12-24-volt-4-wire-system-monitored store_origin: FR region: France --- # 6-Year Timer 12/24V Power UL 2075 Compliant SYSTEM SENSOR CO1224T 12/24 volt, 4-wire, system-monitored C02 carbon monoxide detector w/ RealTest Technology **Brand:** system sensor **Price:** € 185.28 **Availability:** ❌ Out of Stock ## Summary > Breathe Easy, Live Safely! 🏡 ## Quick Answers - **What is this?** SYSTEM SENSOR CO1224T 12/24 volt, 4-wire, system-monitored C02 carbon monoxide detector w/ RealTest Technology by system sensor - **How much does it cost?** € 185.28 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/87822343-system-sensor-co1224t-12-24-volt-4-wire-system-monitored) ## Best For - system sensor enthusiasts ## Why This Product - Trusted system sensor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Wiring Supervision:** Ensure safety with SEMS terminals for reliable monitoring. - • **RealTest Technology:** Test your detector effortlessly with a quick spray. - • **Stay Ahead of Danger:** Experience peace of mind with early CO detection. - • **Built-in Trouble Relay:** Stay compliant with code requirements effortlessly. - • **Versatile Voltage Operation:** Compatible with both 12V and 24V systems. ## Overview The System Sensor CO1224T is a state-of-the-art carbon monoxide detector designed for both 12V and 24V systems. Featuring advanced electrochemical sensing technology and RealTest capability, it ensures reliable monitoring and compliance with UL 2075 standards. With a six-year end-of-life timer and built-in trouble relay, this detector is the ultimate choice for safety-conscious professionals. ## Description SYSTEM SENSOR CO1224T 12/24 volt, 4-wire, system-monitored C02 carbon monoxide detector w/ RealTest Technology ## Features - The System Sensor CO1224T CO detector provides early warning of dangerous carbon monoxide levels by using electrochemical sensing technology to measure levels in the air. - RealTest allows installers to test the detector with a short spray of CO gas. - Full compliance with UL 2075, A six-year end-of-life timer - A trouble relay requireby code, 12/24 VDC operation - Wiring supervision with SEMS terminals ## Images ![SYSTEM SENSOR CO1224T 12/24 volt, 4-wire, system-monitored C02 carbon monoxide detector w/ RealTest Technology - Image 1](https://m.media-amazon.com/images/I/41qBo6DDpLL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy enough to install but you might need the resistor from your old unit, not included *by L***A on April 18, 2025* This unit was easy to install (if you ignore the fact that it was waaaaayyy up at the top of the stairs with a high ceiling, and my son had to stand on the very top of the step ladder on the landing!). He duplicated the wire connections off the old unit, same model. However, we kept getting zone errors on our security system. It's an old Elk M-1 system. I looked at the old unit and saw there was a resistor attached to 2 screws, and the new unit did not have a resistor inside. We took it out of the old unit and attached it to the new unit, and the zone error went away. So I searched the reviews and found this: "A resistor is not included with this carbon monoxide detector, but it may be required for sending the end-of-life signal to your panel, depending on your panel type." So be aware, and move the resistor from old to new unit before you start the re-installation. ### ⭐⭐⭐⭐⭐ Easy do it yourself replacement *by E***. on January 18, 2025* I had to replace a CO-260 Carbon Monoxide Detector on a wired alarm system. I have included a picture of the old one replaced (I do not believe it is manufactured anymore). This new one is just slightly larger, but it was very easy to take the old one off the wall and put this new one in its place (it fit on the existing mounting screws). All the wiring was the same, as were the labels for the wiring screws. It took me about 15 minutes total. The product had a 5 day arrival window, but it came at the beginning of that window (was shipped from Phoenix to Alabama). I bought this product in January 2025. As you can see from the picture without the cover, the device label says the replacement date is August 2034 (and the manufacture date on my box was Aug 2024). Just sharing some pictures in case it helps others. (I powered down the security system + disconnected the system's backup batteries before doing any work). Only needed a flat head screwdriver to pop the cover off of the new device when wiring / mounting, and used a Phillips' head screw driver to tighten down the wires. ### ⭐⭐⭐⭐⭐ Great replacement CO Detector for home alarm system *by G***H on April 26, 2023* Fair price, fast shipping and easy to install. If you have your home, security system monitored, make sure to contact your alarm company prior to removing the old detector as it will trigger the alarm and require a carbon monoxide test by the fire department. Ask me how I know? Also, once the cover is removed from your old carbon monoxide detector, take a picture of the wires and where they mount so that you can reference it when replacing with the new unit. Overall, very pleased and it took less than 10 minutes to remove and replace. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fr/products/87822343-system-sensor-co1224t-12-24-volt-4-wire-system-monitored](https://www.desertcart.fr/products/87822343-system-sensor-co1224t-12-24-volt-4-wire-system-monitored) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-11-13*