
Types of Carbon Monoxide Sensors
- Electrochemical sensor: This type of sensor offers the most protection. It uses a chemical reaction that creates an electric current. This current then triggers an alarm. ...
- Metal-oxide semiconductor: This sensor uses the chemical reaction between CO and oxide to monitor carbon monoxide. Most detectors that use this sensor last up to 10 years.
- Biomimetic sensor: ...
- Optochemical sensor: ...
- Google Nest Protect. : Best overall.
- First Alert OneLink. : Best voice control.
- Alert Pro. : Budget pick.
- Kidde Nighthawk. : Easy installation.
- Kidde Battery-Operated. : Best value.
What are the best CO detectors?
Top 5 carbon monoxide detectors
- Google Nest Protect
- First Alert OneLink
- Alert Plus
- Kidde Nighthawk
- Kidde Battery-Operated. After hours of research and testing, we’ve found the best carbon monoxide detectors and smoke detector combos available.
What is the best CO detector?
Best Plug-In CO Detector First Alert CO615 Good: This plug-in CO monitor from a trusted name in the alarm industry includes a backup battery, peak memory, end-of-life alert, and a backlit digital display.
How many carbon monoxide detectors should you have?
How many carbon monoxide detectors should I have? As a minimum, each home should have one CO detector on each floor, one in or just outside each sleeping area, and one in the basement. In homes where multiple bedrooms adjoin a common hallway, a single detector in the hallway can provide protection for all of the rooms. Click to see full answer.
Should a carbon monoxide detector be high or low?
The short answer is that the placement height of carbon monoxide detectors does not matter because carbon monoxide spreads evenly (ceiling, middle, floor) throughout the air in a home. Some say detectors are more effective closer to the ground because they believe carbon monoxide is heavier than air; therefore, it concentrates low to the floor.

How do I choose a carbon monoxide detector?
If you're in the market for a carbon monoxide detector, the two most important feature options to weigh in your decision are power source and display. Carbon monoxide detectors come in three varieties: hard-wired, plug-in, or battery-operated.
What are the three types of carbon monoxide detectors?
How does a CO detector work? There are three basic types of CO sensors metal oxide, biomimetic and electrochemical.
Is there a difference in carbon monoxide detectors?
A carbon monoxide monitor is different because it actively monitors the amount of carbon monoxide in your air and gives you a digital readout. This lets you know when there are higher than usual amounts of CO in your home, even if they aren't at what other alarms deem a “dangerous” level.
Which is better First Alert or Kidde?
First Alert has better features than the Kidde because of the alarm system with a verbal warning of the threat.
How many carbon monoxide detectors should be in a home?
The International Association of Fire Chiefs recommends a carbon monoxide detector on every floor of your home, including the basement. A detector should be located within 10 feet of each bedroom door and there should be one near or over any attached garage. Each detector should be replaced every five to six years.
Which is better photoelectric or ionization?
The NFPA acknowledges that a well-designed photoelectric alarm will usually outperform ionization alarms in all fire situations, regardless of type and material. During smoldering fires, ionization alarms failed to give sufficient egress time more frequently than photoelectric alarms failed to do so.
What are two warning signs of carbon monoxide poisoning?
The most common symptoms of CO poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. CO symptoms are often described as “flu-like.” If you breathe in a lot of CO it can make you pass out or kill you.
How long is a carbon monoxide detector good for?
CO alarm life span CO alarms have a life expectancy of around seven years. All CO alarms produced after August 1, 2009, have an end-of-life warning notification that alerts the resident that the alarm should be replaced. The CO alarm will beep every 30 seconds or display ERR or END.
What level of carbon monoxide sets off an alarm?
The CO alarm sounds if your sensor detects a buildup of carbon monoxide in your home—usually before you start sensing symptoms. With a low CO level (50 ppm), it may take up to eight hours for the alarm to go off. Higher carbon monoxide levels (over 150 ppm) can trigger an alarm within minutes.
What smoke detector do firemen recommend?
Since no one can predict what type of fire might start in their home, the USFA recommends that every home and place where people sleep have: Both ionization AND photoelectric smoke alarms. OR. Dual sensor smoke alarms, which contain both ionization and photoelectric smoke sensors.
Is Kidde a good carbon monoxide detector?
Best Hardwired Carbon Monoxide Detector CR's take: The hardwired Kidde Silhouette CO detector performs very well. It receives great scores in our high- and low-CO-level tests and a Very Good rating for the accuracy of its CO-level display.
Can your phone detect carbon monoxide?
The Carbon Monoxide Detection Systems Checklist mobile app inspects Carbon Monoxide Detection Systems using an iPad, iPhone, Android device, or a Windows desktop.
Why does my carbon monoxide detector keep beeping?
While it's important to call 9-1-1 if your CO alarm is sounding continuously without stopping, a CO alarm that chirps every 30 seconds is not an emergency. It probably means your CO alarm has reached its end of life and should be replaced. CO alarms have a life expectancy of around seven years.
What are two warning signs of carbon monoxide poisoning?
The most common symptoms of CO poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. CO symptoms are often described as “flu-like.” If you breathe in a lot of CO it can make you pass out or kill you.
What level of carbon monoxide sets off an alarm?
The CO alarm sounds if your sensor detects a buildup of carbon monoxide in your home—usually before you start sensing symptoms. With a low CO level (50 ppm), it may take up to eight hours for the alarm to go off. Higher carbon monoxide levels (over 150 ppm) can trigger an alarm within minutes.
What does l6 mean on a carbon monoxide detector?
The indication is to replace the 9v battery.
How much does a carbon monoxide detector cost?
We cover a range of carbon monoxide detectors with features mentioned above, and include options that span multiple price points, from budget-friendly devices for about $17 to multiunit systems that cost upwards of $150.
What is the blue backlit LED on a carbon monoxide detector?
The blue backlit LED display on this plug-in carbon monoxide detector makes it easy to see CO readings — a definite plus in an emergency situation. It also has a peak memory feature that records readings. Other highlights include battery backup, a test-silence button to ensure the unit is functioning properly, and an 85 decibel alarm.
What is a CO detector?
Carbon monoxide (CO) detectors are battery-operated, plug-in, or hardwired (with backup batteries in case of a power failure). They often include smoke detectors, which have ionization sensors for detecting fast-burning fires, or photoelectric sensors, which detect smoldering, smoky fires.
How often does Nest Protect run diagnostics?
You won’t have to worry about checking the battery or sensors, as the Nest Protect runs diagnostics 400 times daily. It also doubles as an optional hallway light that's triggered when you walk underneath, plus the device comes in hardwired or battery-operated options.
Does Google Home have a smoke detector?
If you have a Google Home ecosystem, this is the carbon monoxide and smoke detector combo for you. It sounds the alarm for dangerous levels of carbon monoxide and has a “split spectrum” sensor that detects fast-burning fires and smoky, smoldering ones by combining a traditional infrared photoelectric sensor with a blue LED. When the alarm is triggered, you’ll get notifications on your phone, plus the app allows you to test alarms and get performance reports.
Does the Carbon Monoxide detector have a voice alarm?
While this battery-powered carbon monoxide detector may be a big jump in price, but it’s features are next-level. For starters, it has a voice alarm, said to be more effective in waking young children, plus it can be connected to other units to create a wireless network for blanket coverage in your home. Once the exact location of carbon monoxide is detected, it pings the other units and triggers the voice alarm.
Is the X-Sense a dual sensor?
It features an electrochemical carbon monoxide detector and a photoelectric sensor for smoky fires, but it isn’t dual-sensor, lacking an ionization sensor for fast-burning fires, which is a disappointment considering the price point.
What are the functions of carbon monoxide detectors?
Some include multiple functions: Dual-function: sense different threats like CO, smoke, and fire. Digital: show you levels of carbon monoxide on a digital screen. Smart: run diagnostics and sync with home automation apps.
How long do carbon monoxide detectors last?
Most carbon monoxide detectors last an average of five years. Although the product’s lifetime will vary depending on your make and model, you can still get the most out of your detector by wiping it down weekly to keep it clean from dust and debris.
How do carbon monoxide alarms work?
Using your home’s Wi-Fi, the carbon monoxide alarms can talk to one another and synchronize to alert you if there is a gas leak or fire. You can also control it from your Apple device through an app, so you can silence the alarm or get notifications on your phone. Pros. 10-year battery.
What are the symptoms of carbon monoxide poisoning?
Carbon monoxide poisoning causes flu-like symptoms like dizziness, nausea, vomiting, headaches, confusion, or fainting.
Why is carbon monoxide called the invisible killer?
Sources of carbon monoxide gas. Carbon monoxide (CO) has been called the “silent and invisible killer” because it doesn’t have a smell, color, or taste. It’s one of the most prevalent causes of death due to poisoning in America.
Can you use a Onelink smoke detector on your phone?
The Onelink smart smoke and carbon monoxide detector can do a lot. Using your home’s Wi-Fi, the carbon monoxide alarms can talk to one another and synchronize to alert you if there is a gas leak or fire. You can also control it from your Apple device through an app, so you can silence the alarm or get notifications on your phone.
Do you need to drill holes in a wall for a carbon monoxide detector?
No need to drill holes in the wall. Like other carbon monoxide detectors, it comes with a test button and LED screen to show the CO levels in your home. When the Nighthawk detects dangerous levels in your home, it will emit a signature beeping pattern so you won’t confuse it with any other alarms in your home.
What are the different types of carbon monoxide detectors?
Types of Carbon Monoxide Detectors. There are two types of carbon monoxide detectors on the market: stand-alone and combination models. Choosing the correct type for your home depends on several factors.
How often does a carbon monoxide detector take a reading?
Each detector in this set senses both smoke and carbon monoxide. The carbon monoxide sensor takes a reading once every 10 seconds and displays the PPM on the easy-to-read LCD display. These units each have an LED light that indicates green for proper function, yellow for a fault, and red for an alarm condition.
How to check carbon monoxide levels?
Those who want to easily see carbon monoxide levels at all times should check out the X-Sense Carbon Monoxide Alarm Detector. This battery-operated carbon monoxide detector features an LCD display on the face that indicates the battery life and carbon monoxide PPM with a reading every 10 seconds; this allows users to monitor the PPM in their homes even before they reach dangerous levels.
How often should you replace a carbon monoxide detector?
Carbon monoxide detectors should be tested monthly, and batteries should be replaced at least once a year, regardless of whether the low-battery alarm sounds.
Why is carbon monoxide alarm so important?
Carbon monoxide detectors are so important because the gas is colorless and odorless, so it’s impossible for people to sense its presence until it’s too late. Carbon monoxide detectors track levels of the gas over time and sound a loud alarm when those levels exceed certain parameters. For instance, a 50 PPM measurement will activate most alarms ...
How long do smoke detectors last?
Each unit has a built-in battery with a 10-year lifespan.
How long is it safe to use a 50 PPM air conditioner?
Carbon monoxide is measured in parts-per-million (PPM). Exposure of 50 PPM is safe for up to 8 hours, 150 PPM is dangerous after 50 minutes, and 1,600 PPM can kill a healthy adult in less than an hour. ...
What is a 3120B smoke detector?
CR’s take: The First Alert 3120B is a dual-sensor smoke detector, meaning it has both a photoelectric sensor for detecting smoky fires and an ionization sensor for detecting flames. Thanks to its use of both types of sensors, this First Alert receives top scores in our flaming fire and smoldering fire tests. It’s hardwired with a battery backup, which makes it a good candidate for newer or remodeled homes that have wiring for detectors, and it features a hush button to silence nuisance alarms. It can be interconnected with additional detectors so that if one goes off, they all go off and alert you to danger even if you’re in a different room or on a different floor from the fire.
How many people die from carbon monoxide poisoning?
A detector’s ability to sense carbon monoxide can mean the difference between life and death. According to the CDC, every year more than 400 Americans die from accidental CO poisoning, and about 50,000 Americans end up in the emergency department.
Does the Onelink CO511B have voice?
CR’s take: If you need a battery-powered CO detector, check out the First Alert Onelink CO511B. It excels in our tests for detecting high and low CO levels, as well as for the accuracy of its CO readings, which it “speaks” via voice. Aside from its voice alerts, this model features the ability to wirelessly interconnect with other compatible alarms. It also has a peak memory feature, which logs the highest CO reading so you can see if there was a problem while you were away from home.
Does Kidde Silhouette have a CO detector?
CR’s take: The hardwired Kidde Silhouette CO detector performs very well. It receives great scores in our high- and low-CO-level tests and a Very Good rating for the accuracy of its CO-level display. This model features the ability to log the highest CO levels it detects (referred to as peak memory), which is good for checking to determine whether there has been a problem when you’ve been away from home for a long period of time. That lets you know if you need to have things checked out. It also has a battery backup and the ability to interconnect with other compatible alarms.
Is the CO615 a plug in detector?
CR’s take: The First Alert CO615 is one of the few plug-in CO detectors in our tests, and it beats out its hardwired and battery-powered brethren, with strong scores in our tests for detecting high and low CO levels quickly, as well as a Very Good rating for the accuracy of its CO level display. It features a battery backup and peak memory (so you can check whether CO levels were high after you’ve been gone for a long period of time).
Do you need a hardwired detector?
To determine the type you need, remove the detectors in your home from their mounts. If there are wires connected to them that run into the wall or ceiling, you need hardwired detectors. If there are no wires, you need battery-powered detectors.
Is Google Nest a good smoke detector?
CR’s take: The Google Nest Protect is another WiFi-enabled combination smoke-CO detector that performs well in our tests. It receives strong scores in our tests for low CO levels and smoldering fires, as well as a Good rating for detecting high CO levels. But like the First Alert Onelink above, it falls short in our flaming fire test. If you go with this detector, you may want to also consider purchasing a battery-powered ionization smoke detector, such as the Kidde RF-SM-DC. The Google Nest Protect comes in both battery-powered and hardwired versions and can interconnect with additional Nest Protects.
