--- product_id: 54583062 title: "HEIMAN Portable Carbon Monoxide Detector Alarm Operated Long Life battery Powered with LED Digital Display,Mains Replaceable 2 Pack AA Battery for Home-723ESY [Energy Class A+++]" brand: "heiman" price: "6.69 DT" currency: TND in_stock: false reviews_count: 5 url: https://www.desertcart.tn/products/54583062-heiman-portable-carbon-monoxide-detector-alarm-operated-long-life-battery store_origin: TN region: Tunisia --- # HEIMAN Portable Carbon Monoxide Detector Alarm Operated Long Life battery Powered with LED Digital Display,Mains Replaceable 2 Pack AA Battery for Home-723ESY [Energy Class A+++] **Brand:** heiman **Price:** 6.69 DT **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** HEIMAN Portable Carbon Monoxide Detector Alarm Operated Long Life battery Powered with LED Digital Display,Mains Replaceable 2 Pack AA Battery for Home-723ESY [Energy Class A+++] by heiman - **How much does it cost?** 6.69 DT with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/54583062-heiman-portable-carbon-monoxide-detector-alarm-operated-long-life-battery) ## Best For - heiman enthusiasts ## Why This Product - Trusted heiman brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description About Silence Killer-COcarbon monoxide is a colorless,odorless and tasteless gas .CO poisoning and death canoccur when CO leak.Carbon monoxide is the most widely distributed and the largestamount of pollutants in the atmosphere and one of the important pollutants generatedduring the combustion process if it relies on combustion of fossil fuels for heat,vemtilation,hot water,cooking or for any other purpose,you need to have a carbon monoxidedetector installed in your home.For example, what you can often see fossil fuels in life:gasoline、wood、 coal、natural gas、propane oil、 methane.The UL Standrad of carbon monoxide detector.Sensitivity & Time◆30ppm, alarms after 120 minutes◆50ppm, alarms within 60~90 minutes◆100ppm, alarm within 10~40 minutes◆300ppm, alarms within 3minutes◆400ppm(deadly level),alarms ImmediatelyMeasures of maintenance◆Test before use:Please test alarm once a week by pressing the Test/Hush button toensure work well.◆Keep the alarm clean:Vacuun the alarm cover once a month to remove accumulated dust.Remember not paint the unit.◆Installtion Location:Check whether the place the product installed is too airy, which coulddraw amoke away from the alarm,such as near air conditioning or heaters.Packing list1x CO detector（723ESY）1x mounting bracket1x user manual2x batteries2x screws2x dowelsAbout usHeiman Technology Co. Ltd is a Hi-tech enterprise which specializes in research &development of security products including PIR detector, IR detector, smoke detector, gasleakage detector, security alarm system, magnetic switch,button, alarm siren and etc..With advanced equipments, specialized engineers and versatile service.Product logo has been updated.Logo color changed from gray to orange.Product function is maintained.Please use it without any worries. ## Features - About this item 【Accuracy & Sensitivity】:Large LCD Digital display(With LED backlight) show the CO levels continuously.The corresponding CO concentration has a relatively fixed time to achieve sound & flash alarm.Sound level:>85dB/m.Make the invisiable killer nowhere to escape. 【Extremely excellent quality】: Professional certification EN 50291: 2010,CE & ROHS. High reliability FIGARO electrochemical sensor,detecting the colorless, odorless,tasteless and deadly carbon monoxide effectively.SMT surface manufacture technology lead-free PCB Circuit board.Fire-resistant ABS shell,keep away from cheap plastic,high stability and not easy to change color.Extraordinary material and professional manufacture technology beyond all competitors. 【Smart Function and Indicators】:Peak level query,self-test function, malfunction auto-check indicator, low battery warning.All of the functions are automatic operated by the microchip,makes it more easier for people to use it. LED indicators:Green LED shows that the detector is in normal working State,RED LED blink when alarming,Yellow LED blink means the malfunction state. 【Battery Safe Mode】:2*1.5V AA battery included,special battery tamper-resistant design,no way to install the detector without battery,more safer 【What You Get】:100% money back guarantee if you are not satisfied with our products.Package include:1x CO detector (723ESY) with mounting bracket, user manual, screws and dowels ›See more product details ## Images ![HEIMAN Portable Carbon Monoxide Detector Alarm Operated Long Life battery Powered with LED Digital Display,Mains Replaceable 2 Pack AA Battery for Home-723ESY [Energy Class A+++] - Image 1](https://m.media-amazon.com/images/I/61iViGmbtTL.jpg) ![HEIMAN Portable Carbon Monoxide Detector Alarm Operated Long Life battery Powered with LED Digital Display,Mains Replaceable 2 Pack AA Battery for Home-723ESY [Energy Class A+++] - Image 2](https://m.media-amazon.com/images/I/6180jqAc+TL.jpg) ![HEIMAN Portable Carbon Monoxide Detector Alarm Operated Long Life battery Powered with LED Digital Display,Mains Replaceable 2 Pack AA Battery for Home-723ESY [Energy Class A+++] - Image 3](https://m.media-amazon.com/images/I/61VOVPhkhRL.jpg) ![HEIMAN Portable Carbon Monoxide Detector Alarm Operated Long Life battery Powered with LED Digital Display,Mains Replaceable 2 Pack AA Battery for Home-723ESY [Energy Class A+++] - Image 4](https://m.media-amazon.com/images/I/61MgDOh8mqL.jpg) ![HEIMAN Portable Carbon Monoxide Detector Alarm Operated Long Life battery Powered with LED Digital Display,Mains Replaceable 2 Pack AA Battery for Home-723ESY [Energy Class A+++] - Image 5](https://m.media-amazon.com/images/I/61uC7AEAEoL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Five Stars *by A***N on Reviewed in the United Kingdom on 16 March 2018* Easy to fit. ### ⭐⭐⭐⭐⭐ One very good reason for choosing this one *by H***N on Reviewed in the United Kingdom on 11 March 2016* You need to be careful with reviews of products like this. I reviewed a smoke alarm which lots of people had given 5 stars without testing in smoke. When I tested it in smoke the alarm didn't go off.Carbon monoxide alarms are even harder to test. They mostly do nothing until you are in danger of dying from poisoning and until that happens you have no way of knowing if they actually work.This one has an important difference. It gives a digital reading of the carbon monoxide level. I put a burning candle in a bottle and deprived it of air until it started giving off carbon monoxide. The device immediately registered the concentration. I can't create enough carbon monoxide in this way to reach danger levels so when I did the same test on another brand nothing happened and I had no way of telling whether it worked.I am therefore totally confident that alarm works and if you buy it you can easily check for yourself.I was given this product free for review. I write reviews, not advertisements. There are many instances where I have pointed out important problems with products that have been highly rated. ### ⭐⭐⭐⭐⭐ Sensible Option That Will Help Keep You Safe *by D***S on Reviewed in the United Kingdom on 24 June 2016* HEIMAN Independent Carbon Monoxide Detector Co Alarm 3V Battery Operated LCD Display HM-723ESY.This is a sensible product to have for safety purposes if you have a gas fire/heater or a gas boiler in one of your rooms. The Heiman Carbon Monoxide Detector is a good quality safety alarm that will help protect you from dangerous levels of invisible carbon monoxide gas.It is battery powered and comes supplied with the 2 x AA required. The alarm can be set off and tested and then hushed from the front panel. The sound is ear-piercing and a visual red alarm light will flash. I tested this against my car exhaust from a cold start and it set the alarm off reading a higher than acceptable level of carbon monoxide.The LCD Screen displays real-time concentration, alarm peak value, sensor malfunction and ultra-lower voltage indicator. It should be installed on a wall or ceiling where it seems possible gas may accumulate.In summary, if you have a gas heater in a room you use then it would be sensible to have a carbon monoxide detector and this would do nicely to help keep you safe.I was kindly sent a free or discounted sample of this product by the supplier in return for an honest and unbiased review. --- ## 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.tn/products/54583062-heiman-portable-carbon-monoxide-detector-alarm-operated-long-life-battery](https://www.desertcart.tn/products/54583062-heiman-portable-carbon-monoxide-detector-alarm-operated-long-life-battery) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-21*