--- product_id: 83301481 title: "First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm" brand: "first alert" price: "52 kr" currency: NOK in_stock: false reviews_count: 5 url: https://www.desertcart.no/products/83301481-first-alert-sa320cn-dual-sensor-battery-powered-smoke-and-fire store_origin: NO region: Norway --- # 85 dB loud alarm 2 AA batteries included Dual sensor tech First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm **Brand:** first alert **Price:** 52 kr **Availability:** ❌ Out of Stock ## Summary > πŸ”₯ Stay ahead of danger with dual-sensor fire detection! 🚨 ## Quick Answers - **What is this?** First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm by first alert - **How much does it cost?** 52 kr with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/83301481-first-alert-sa320cn-dual-sensor-battery-powered-smoke-and-fire) ## Best For - first alert enthusiasts ## Why This Product - Trusted first alert brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Smart Alarm Logic:** Intelligent sensing reduces false alarms, so you only get alerted when it truly matters. - β€’ **Trusted Durability:** Backed by a 10-year warranty, this compact unit is built to protect your home long-term. - β€’ **Dual Sensor Precision:** Ionization + photoelectric sensors detect both flaming and smoldering fires for unmatched safety. - β€’ **Powerful Audible Warning:** 85 dB alarm ensures you hear it loud and clear, giving you ample time to act. - β€’ **Battery-Ready Convenience:** Operates on 2 AA batteries (included) for easy, wireless installation anywhere in your home. ## Overview The First Alert SA320CN is a compact, battery-powered smoke and fire alarm featuring dual ionization and photoelectric sensors for comprehensive fire detection. It operates on 2 AA batteries (included) and emits a loud 85 dB alarm to alert you promptly. Designed with intelligent sensing technology to minimize false alarms, it comes with a 10-year warranty, making it a reliable safety upgrade for any modern home. ## Description Utilizes both ionization and photoelectric smoke sensors for optimal performance Review: Easy install, great alarm. - Packaging: The three alarms arrived in individual bulk brown box packaging; nothing wrong with that. In the box was the alarm, 2 AA alkaline batteries, mounting screws, and instructions. I am a guy so who needs instructions. The alarm itself was wrapped very well in bubble-wrap. I am very satisfied with the packaging. Installation: Installation was a breeze. You first install the two batteries according to the diagram on the alarm. The new alarms were replacing old First Alert fire alarms that we have had for over 20 years. I now know you should replace alarms every 10 years. I removed the old alarms by loosening the mounting screws a couple turns, turning the old alarm to align the mounting holes and that was that. The new alarm has a base and alarm. The new base fit perfectly over the existing screws from the old alarm. Tighten the screws and the hard part is done. Then place the alarm over the mounting plate and give a 1/3 turn and you are done. Operation: After they were mounted I pushed the test button and each unit gave two sets of 3 beeps. Happy alarms. Observations: I have heard that the alkaline batteries provided last between one and two years. When they do wear out I will be trying Lithium batteries to see if they last longer. I tried Lithium 9V batteries in the old alarms and two out of four had corrosion on the positive terminal after one year. (P.S. the fourth new alarm was a CO2 + Fire alarm). The only time our fire alarms have ever gone off is when my bride has used them as a dinner bell. Alarm goes off = Dinner is done. PBJ for dinner tonight. Review: Highly Recommended Dual Sensor Smoke/fire Alarm - We have several of these around the house as well as CO monitors. This was one of the Consumer Reports recommended dual sensor smoke and fire alarm and we are very satisfied with it so far. I used to get the combo smoke/fire/CO a;arm but they require the units to be replaced on different schedules, 10 years for the smoke/fire and 5 years for the CO alarms. I also prefer to change the batteries every year rather than relay on an alarm that has a 10 year battery. That is fine for the CO if replacing it every 5 years but not so for the smoke/fire alarm. I have read reports that the 10 year battery may not last the entire 10 years from the date you install it in your house. I use the Christmas time frame to replace batteries because it seems you are always getting gifts for kids or grand kids that require batteries so why not replace at that time. Also I use the calendar app to remind me each year and don't dismiss it until I have replaced batteries. The dual sensor smoke/fire alarm is very sensitive to smoke and heat so where you place it is key if you don't want to have it going off all the time. I had placed one of these in the hallway outside the second bathroom and found out it would go off if one of the kids was taking a hot shower when the steam coming out of the bathroom would set of the alarm. Moving it away from the entrance solved the problem. As I mentioned above we have had several of the First Alert alarms in the house over the years and I have been satisfied completely with the performance and would recommend them to anyone, whether it be a smoke/fire/CO combination alarm or the dual sensor smoke/fire alarm. Both are very sensitive to what they are built to detect (important as some CO sensors are not as sensitive as others which means they alarm at a much higher CO level). ## Features - Utilizes both ionization and photoelectric smoke sensors for optimal performance - Intelligent sensing technology reduces non-emergency or nuisance alarms - Operates on 2 AA batteries (included) - Detects both flaming and smoldering fires with dual sensors - Emits a loud 85 dB alarm for ample warning - SA320FF designates SA320CN package in Frustration Free packaging with UN2911 labels for ion smoke alarms - Package Contents: 1 Piece Powered Smoke and Fire Alarm ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00O8MVW0S | | Alarm | Audible | | Best Sellers Rank | #370,506 in Home Improvement ( See Top 100 in Home Improvement ) #1,083 in Home Security Alarms | | Brand | First Alert | | Built-In Media | 1 Piece Powered Smoke and Fire Alarm | | Colour | White | | Customer Reviews | 4.5 out of 5 stars 3,280 Reviews | | Global Trade Identification Number | 00029054015358 | | Item Weight | 0.7 Pounds | | Manufacturer | Jarden Safety | | Manufacturer Warranty Description | 10 year warranty | | Mfr Part Number | SA320CN | | Model Number | SA320FF | | Power Source | Battery Powered | | Product Style | Compact | | Sensor Type | Photoelectric | | Style | Compact | | UPC | 029054015358 | | Unit Count | 1.0 Count | ## Product Details - **Alarm:** Audible - **Brand:** First Alert - **Colour:** White - **Global Trade Identification Number:** 00029054015358 - **Item Weight:** 318 g - **Manufacturer:** Jarden Safety - **Net Quantity:** 1.0 Count - **Power Source:** Battery Powered - **Sensor Type:** Photoelectric - **Style:** Compact ## Images ![First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm - Image 1](https://m.media-amazon.com/images/I/61MLRUElYzL.jpg) ![First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm - Image 2](https://m.media-amazon.com/images/I/71c-Nuno3bL.jpg) ![First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm - Image 3](https://m.media-amazon.com/images/I/61UrGM2NuhL.jpg) ![First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm - Image 4](https://m.media-amazon.com/images/I/71Ot79xzeVL.jpg) ![First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm - Image 5](https://m.media-amazon.com/images/I/51e1sYRVtTL.jpg) ## Questions & Answers **Q: I recently purchased three of these smoke alarms from Amazon. Can you tell me how high up on the wall the alarm should be installed as I do not want to install on ceiling. I specifically purchased these as they can be ceiling or wall mounted. Thanks.** A: The instructions that come with the unit duplicate what I have read from several Fire Department sources: you can place your unit on the ceiling, but AT LEAST 4 inches (10cm) from the wall. If you want to mount it on the wall, mount it MORE THAN 4 inches (10cm) BELOW the ceiling, but NO LOWER than12 inches (30cm) below the ceiling. It has to be high enough up the wall to "smell" the smoke, but that 4 x 4 inch (10cm x 10cm) area where the wall meets the ceiling can sometimes harbor a "dead zone" of still air where the smoke would NOT reach the detector quickly enough during a fire to warn you in time. Thus, do NOT mount your detectors too close to where the wall meets the ceiling. **Q: Is this detector a photoelectric or ionization type?** A: Please check with your local authority having jurisdiction. Also you can check with NFPA online. Ionization smoke alarms are generally more responsive to flaming fires. How they work: Ionization-type smoke alarms have a small amount of radioactive material between two electrically charged plates, which ionizes the air and causes current to flow between the plates. When smoke enters the chamber, it disrupts the flow of ions, thus reducing the flow of current and activating the alarm. Download this chart on ionization smoke alarms (PDF, 943 KB). Photoelectric smoke alarms are generally more responsive to fires that begin with a long period of smoldering (called β€œsmoldering fires”). How they work: Photoelectric-type alarms aim a light source into a sensing chamber at an angle away from the sensor. Smoke enters the chamber, reflecting light onto the light sensor; triggering the alarm. Download this chart on photoelectric smoke alarms (PDF, 782 KB). **Q: Does the unit beep to tell you that the battery is running low?** A: The beep is effective. It always seems to start in the middle of the night. I twist the unit off the ceiling and do a battery swap and have it back on the ceiling in less than a minute, craw back into bed before really waking up. It's not a pain to replace the batteries, it's very easy. Simply slide the tray out and pop new ones in. The batteries fit snuggly in the compartment and there are tabs that allow you to push the batteries out by applying pressure with your thumbs from the back side. There is an optional screw hole to make the battery compartment tamper resistant. This prevents people from easily taking the batteries to power their remote controls or whatever. When fire marshals inspect fire related deaths it's not uncommon to find the smoke and fire detectors had no batteries installed. This simple, optional, screw might seem like "a pain" to some people, but it's an easy way to save your life. This is a great unit. I have 6 in my house and I highly recommend them to everyone. **Q: 5 or 10 year warranty? Picture & Description say 10, Features says 5.** A: Package says 10 year limited warranty. It's cheap, easy to install. This is my second one. Had first one for 8 years. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy install, great alarm. *by B***E on 20 November 2016* Packaging: The three alarms arrived in individual bulk brown box packaging; nothing wrong with that. In the box was the alarm, 2 AA alkaline batteries, mounting screws, and instructions. I am a guy so who needs instructions. The alarm itself was wrapped very well in bubble-wrap. I am very satisfied with the packaging. Installation: Installation was a breeze. You first install the two batteries according to the diagram on the alarm. The new alarms were replacing old First Alert fire alarms that we have had for over 20 years. I now know you should replace alarms every 10 years. I removed the old alarms by loosening the mounting screws a couple turns, turning the old alarm to align the mounting holes and that was that. The new alarm has a base and alarm. The new base fit perfectly over the existing screws from the old alarm. Tighten the screws and the hard part is done. Then place the alarm over the mounting plate and give a 1/3 turn and you are done. Operation: After they were mounted I pushed the test button and each unit gave two sets of 3 beeps. Happy alarms. Observations: I have heard that the alkaline batteries provided last between one and two years. When they do wear out I will be trying Lithium batteries to see if they last longer. I tried Lithium 9V batteries in the old alarms and two out of four had corrosion on the positive terminal after one year. (P.S. the fourth new alarm was a CO2 + Fire alarm). The only time our fire alarms have ever gone off is when my bride has used them as a dinner bell. Alarm goes off = Dinner is done. PBJ for dinner tonight. ### ⭐⭐⭐⭐⭐ Highly Recommended Dual Sensor Smoke/fire Alarm *by S***P on 2 April 2018* We have several of these around the house as well as CO monitors. This was one of the Consumer Reports recommended dual sensor smoke and fire alarm and we are very satisfied with it so far. I used to get the combo smoke/fire/CO a;arm but they require the units to be replaced on different schedules, 10 years for the smoke/fire and 5 years for the CO alarms. I also prefer to change the batteries every year rather than relay on an alarm that has a 10 year battery. That is fine for the CO if replacing it every 5 years but not so for the smoke/fire alarm. I have read reports that the 10 year battery may not last the entire 10 years from the date you install it in your house. I use the Christmas time frame to replace batteries because it seems you are always getting gifts for kids or grand kids that require batteries so why not replace at that time. Also I use the calendar app to remind me each year and don't dismiss it until I have replaced batteries. The dual sensor smoke/fire alarm is very sensitive to smoke and heat so where you place it is key if you don't want to have it going off all the time. I had placed one of these in the hallway outside the second bathroom and found out it would go off if one of the kids was taking a hot shower when the steam coming out of the bathroom would set of the alarm. Moving it away from the entrance solved the problem. As I mentioned above we have had several of the First Alert alarms in the house over the years and I have been satisfied completely with the performance and would recommend them to anyone, whether it be a smoke/fire/CO combination alarm or the dual sensor smoke/fire alarm. Both are very sensitive to what they are built to detect (important as some CO sensors are not as sensitive as others which means they alarm at a much higher CO level). ### ⭐⭐⭐⭐⭐ Good *by C***K on 9 January 2025* Contrary to what some reviewers have said, these new detector do NOT fit in a he same mounting ring used for PI2050 and PI9000 and PI9010. The new ring is about 1/4 inch smaller in diameter. Why, oh why, could they have not kept the same mount??? Now, instead of just a quarter turn to remove the old detector and a quarter turn to install the new one, you have to remove the old ring and install a new one. Fortunately, the screw pattern does match. But why change this for a quarter inch???? The new detectors are upwards of an inch thicker than most. These detectors use BOTH ionized and photo electric detection methods. This is good. Keep in mind that any detector must be reflected in the new design which it. Anyway, I do reflect well on these. If you can get past the dated stuff. HeΓ’ ## Frequently Bought Together - First Alert SA320FF Dual-Sensor Smoke and Fire Alarm, Battery Powered, Frustration-Free Packaging, White , 1 Pack - First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White - First Alert BRK 3120B Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup, Dual Sensing Smoke Alarm, 1-Pack --- ## 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.no/products/83301481-first-alert-sa320cn-dual-sensor-battery-powered-smoke-and-fire](https://www.desertcart.no/products/83301481-first-alert-sa320cn-dual-sensor-battery-powered-smoke-and-fire) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-16*