The 12 Best First Alert motion Detectors (2023 reviews)

The first alert loud decibel alarm's material feels more premium than its price would suggest. The first alert co600 carbon monoxide alarm uses an electrochemical carbon monoxide sensor. It really does warn when it's going to die at the end of its life cycle. The test/silence button both silences a non-threatening alarm and allows you to test the unit's functionality. It is easy to install, meets legal requirements, no battery to replace, and can be placed in any room where an electrical outlet can be found.

This is a great CO detector as it is plugged in and has. It has a loud identifying alarm sound if and when needed. It is easy to assemble, meet all the government standards, and are a great buy.

Why We Like This:

Easy to install, even comes with name brand batteries
Battery, no annoying low battery alarm in the middle of the night
New and hot release

Best With existing slot: First Alert Smoke Alarm

Buy on Amazon

The first alert smoke alarm is capable of outshining several other products featured in this list in overall features in its price range. The house is quiet, and everyone is happy that there are functioning smoke alarms in all rooms. The new ones looks more cool with nice shape/size, And it uses the similar back fixture like the old one so easy to install with no pain. The hardwired adapters are the exact same as the ones installed in. They are easy to install and fit the existing wiring.

The alarms come with a battery already. It has an easy-to-access battery drawer that allows you to replace the battery without dismounting the alarm. It tested perfectly with the test button as well as with actual smoke from a candle. This is a quick and easy upgrade.

Why We Like This:

Comes with the 9v backup battery installed
Good economical and quick direct-replacement of original units in the house
Hassle free replacement with no batteries to fuss with
Very easy to install as a replacement

Best For Senior: First Alert old Detector

Buy on Amazon

The first alert old detector's superior materials makes sure that it ages well with use. This CO alarm is approved for use in single-family residences. It offers continuous protection for the life of the carbon monoxide detector. It’s reasonably priced, easy to mount on a wall, lightweight, easy to read, displays the room temperature, and it’s simple to operate. The unit continuously shows the current room temperature, but you can lightly tap the top button to temporarily view the PPM CO value, or tap it again clear the stored CO value.

Unlike many other CO2 detectors, this includes a non-replacable battery that is guaranteed to work for 10 years. The temperature gauge is great, and it’s easy to install and use. The detector works with a long life sealed lithium battery that powers the alarm for a period of 10 years without a battery replacement. These are compact and easy to install.

Why We Like This:

Good co alarm with no battery replacement worries
Super easy, thermostat is a nice bonus
Size easy to carry when traveling

Best With Carbon Monoxide Detector: First Alert CO Alarm

Buy on Amazon

We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate detector. The product is exactly that - it's a simple product that hits all the right notes. The Carbon monoxide detector is Extremely difficult to open as Well. It features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room. It will emit a distinct chirp pattern. The detector does not have a light or beep, no sign to allow the consumer to know that it works or is working. It is easy to attach to the wall, and easy to change the batteries. It provides accurate reading. The detector does not have a light or beep, no sign to allow you to know that it works or is working.

Why We Like This:

Works just fine and alerts you when battery is running down
Easy to use and hang on the wall
A must for all homes and easy to install
Good value, good protection for your home

Best With older First Alert wiring: Firstalert motion Detector

Buy on Amazon

The firstalert motion detector is the best convenient product on the market today. One last thought, this detector is the ionoization type. That way, if you live in California, you'll be compliant with the new CO detector law that goes into effect this year (01JUL11) and you'll have a freshly installed smoke detector. It is easy to install a universal mount bracket. The mounting rings need to be replaced, which is so easy it takes less than 5 minutes each. The reset button takes a good second of having to listen to the VERY very loud beeping.

Some suggestions, tag the connectors in the electrical box, clearly identifing the installation date so you and others can tell when the units are installed. Be aware they do not have it already incorporated into the system. Saw others saying they go off without a reason.

Why We Like This:

It even comes with the back up 9v battery
Delivers what they promise

Best For real thing: First Alert existing Smoke Alarm

Buy on Amazon

Best part: first alert existing smoke alarm costs comparatively low and it is available to ship in 24 hours. If you already have a similar first alert fire detector this will fit in the existing wiring which is nice. It works with other smoke dectectors. It can connect to other compatible brk or first alert detectors, to ensure all alarms will sound when threat is detected. They are connected to the sprinkler system. It provides full house notification. It is guaranteed to last ten years and it comes with a ten year battery. It comes with required mounting screws. They are very easy to install when the existing wiring is already there. It's great fun to change in the middle of the night.

Why We Like This:

Fit right into the old mounting hardware perfectly
Great combo with sealed battery compartment-perfect for replacement of 10 year old detector
Easy to install, test and reset

Best With Your system: First Alert ring Alarm

Buy on Amazon

First Alert has been making great detector for years, thanks to a combination of clever design and appropriate materials. It is an easy way to add a little extra peace of mind. This combination Smoke/CO Alarm is designed to be mounted on the ceiling or wall. It will alert you to which room and what type of alarm you have. The smoke and carbon monoxide monitoring with the option for professional monitoring if you have a ring alarm is awesome. This one has a photoelectric sensor only.

The COMBINED SMOKE AND CO2 PROTECTION IN A EASILY MOUNTABLE ALARM WHICH INCLUDES Z-WAVE TECHNOLOGY TO EASILY INTERFACE WITH THE RING ALARM SYSTEM AND ITS ASSOCIATED MONITORING MAKES THIS DEVICE A 5 STAR NUMBER 1 CHOICE. It is great having that extra layer of protection with these tied into the Ring alarm monitoring.

Why We Like This:

Super easy to connect to z-wave system
Very loud and works great with the ring system
Connects fairly easily to the samsung smartthings hub
Excellent z-wave combination smoke and co alarm

Best For building: First Alert Carbon Monoxide Detector

Buy on Amazon

We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate detector. The product is exactly that - it's a simple product that hits all the right notes. It is a large house that was converted to 4 apartments. This model interconnects with other SCO500B models so that if there is an alert in another part of the house, all alarms beep and give a voice alert. The detectors send a radio signal to each detector when there is an alarm. They interact with each other wirelessly so if one alerts they all begin to sound and tell you which room has an alarm.

These wirelessly linked detectors, whether they are fire only or fire and co work well, are loud and alert you to the location and type of hazard. It doesn’t have WiFi, so it won’t connect with home automation systems. They have voice announcement and speak. It does not need the internet or unreliable remote servers like alexa or ring.

Why We Like This:

You can add more units to protect many separate locations, potentially over long distances
Easy to get detectors to work in a network
One of the new comers and featured product

Best For either electrical box: First Alert Carbon Monoxide Alarm

Buy on Amazon

The first alert carbon monoxide alarm's material feels more premium than its price would suggest. It's a nice clean unit and installs just like any other hardwired smoke alarm. It features an electrochemical carbon monoxide sensing technology as well as intelligent smoke sensing technology to reduce nuisance alarms. These are also all inter-connected through an common wire which is an added advantage. It is designed for either electrical box.

The clips are the same and the mounting plate has the exact same line up. It is easy to install with extended battery life. It is good as the 10 year battery backup means constant monitoring for the life of the alarm even if there's a power failure, single button test/silence. It features are provided to prevent battery theft and/or theft of the unit.

Why We Like This:

Good replacement for older first alert smoke detectors
One of the new comers and featured product

Best With everything: First Alert decibel Alarm

Buy on Amazon

The first alert decibel alarm's high-end materials makes sure that it ages well with use. Photoelectric smoke alarms are more effective at warning of smoke from smoldering fires and are less susceptible to nuisance alarms. These are easy to replace and their updated look looks great. They are loud especially since they all go off when hardwired to the house. The screw holes match, so the switch is easy. These even come with a DC/AC escape light if a fire shuts down electrical service.

These units also come in a lithium battery flavor. The alarm is loud enough to wake and alert all in the house. It works excellent, the light is enough to get you out in any emergency or emergency.

Why We Like This:

Separate indicators for ac power and battery backup
More balancing on ladders fighting with removing the detectors to change the battery
Good replacement for hardwired first alert

Best For Installation: First Alert electrochemical Carbon Monoxide Sensor

Buy on Amazon

The first alert electrochemical carbon monoxide sensor should be able to handle its purpose and duties with ease. This is First Alert’s mid-range CO detector. It uses two AA batteries. Its easy-to-read backlit digital led display gives you a clear read-out of current co concentrations in parts per million. It uses normal AA batteries and has a display which shows readings. It comes with screws for easy installation on a wall.

This versatile detector includes a long life sealed lithium battery to power the alarm for a full 10 years without replacing the battery. It has no plug, it is battery operated. It is fairly easy to install with enclosed Template. It is a very loud alarm with three, short, fast, and beeps.

Why We Like This:

Alert carbon monoxide detector, is an attractive, professional looking smoke detector
Capability and visually indicate that the battery and detection capability
Lot of satisfied buyers

Best For households With kids: First Alert Smoke Detector

Buy on Amazon

The features department is where first alert smoke detector truly manages to shine. You should definitely get this item if you have a hardwired smoke alarm system and have issues with false alarms whenever you cook. It protects your family and adds this to your detector set. It is perfectly linked to other alert/brk alarms. The alarm is ridiculously loud when all the alarms go off together. The detector tells you when it no longer functions, which is great. The horn sounds at varied frequencies so that hearing impaired can also hear it.

These are normally powered by line voltage but have batteries in case of power failure. It is the only way to go to prevent false alarms and get accurate, prompt alerts when there is an actual fire before its too late.

Why We Like This:

Can finally shower without alarms going off
Easy to install if replacing an existing smoke detector
Works great, simple to test and a snap to install
Great for families, easy to install