19 Best Door and Window Alarms of 2021 – Reviews-Buyer’s


The security of your home is something you should never compromise under any circumstances.

Why, heck! You never know when the next absolutely weird ball might fly out the window!

And since you can’t wait like the medieval knight with his sword and guard the door for the next intruder to enter, technology has conveniently created alarm systems for you.

Our Top Pick

Last update on 2022-11-13 / Affiliate links / Images from Amazon Product Advertising API

Top 10 Best Door Alarm To Buy In 2021

Last update on 2022-11-08 / Affiliate links / Images from Amazon Product Advertising API

10 Best Door Alarm Review

Bestseller No. 1
Safety Technology International, Inc. STI-6400 Exit Stopper Multifunction Door Alarm, Helps Prevent Unauthorized Exits or Entries Through Emergency Doors
  • Highly visible "stop sign" design acts as a deterrent
  • Virtually indestructible polycarbonate housing
  • Detects both unauthorized exits and entries
  • Less expensive than heavy horizontal bar type units
  • 3 year guarantee against breakage of polycarbonate in normal use (one year on electro mechanical and electronic components).
SaleBestseller No. 2
WiFi Door Alarm System, Wireless DIY Smart Home Security System, with Phone APP Alert, 8 Pieces-Kit (Alarm Siren, Door Window Sensor, Remote), Work with Alexa, for House, Apartment, Alpha by tolviviov
  • ✅ALPHA WIRELESS SECURITY SYSTEM - A smart way to protect your house with tolviviov Smart Home Security System. 8-piece kit includes the 1 alarm siren station, 5 windows & door sensors and 2 remote controls. No contracts and No subscription fee.
  • ✅SMART ALARM SYSTEM for Home - tolviviov Alarm Security System is an affordable solution for your apartment security. You have full control over the door alarms for home security through your smartphone and get instant notifications of alarms alert in your house or apartment.
  • ✅CUSTOMIZATION - You can add extra door and window sensors, motion detectors, wireless doorbell, and water detectors to different rooms in your home security systems;It supports expansion of up to 20 sensors and 5 remote controls/keypads, which can be added to the WiFi alarm station.
  • ✅DIY INSTALLATION - Easily set up tolviviov Wireless Home Security System in minutes without tools. The wireless connection devices does not damage the wall. The alarm station should ALWAYS CONNECT to AC adapter. The backup battery works for 8 hours, only as an emergency battery.
  • ✅VOICE CONTROL and WIFI Network - Your tolviviov Home Alarm System can be easily controlled by Away, Disarm, and Home modes with your voice. Works with Alexa and Google Assistant. WIFI connection, Only works on 2.4GHz WiFi network, does NOT support 5GHz WiFi networks.
SaleBestseller No. 3
CPVAN Home Security System Kit(2.4GHz&5GHz WiFi), Wireless Door Alarm, APP Alert, Remote, Door/Window Sensor, Base Station, and Siren, for Kids Elders Safety, fit House/Apartment. Works with Alexa.
  • A great choice for smart home security system: Put whole-home security at your fingertips with APP whether you are at home or at work. The kit includes 1 alarm hub, 4 door window sensors, 2 remote controls, 1 alarm siren(125dB). Wireless range with 500ft, and no monthly fees!
  • Powerful DIY door alarms: SmartLife App has built-in defense zone functions and product attributes and has Armed, Disarmed, and Home modes, you can give device more personalized settings according to your needs. Eleven hub languages.
  • Loud enough and Powerful: When the siren is connected to the hub, 125dB alarm will scare away any intruders. The hub has a built-in battery backup that works for 2 hours and is only used as an emergency.
  • Protecting all aspects: As a door chime or alarm. When the door or windows been opened, the receiver will sound a chime or an alert and you can receive mobile notifications so that you can know someone break-in or your kids, your pets, Alzheimer's patients slipped out of the house at any time anywhere.
  • Easy installation(Supports both 2.4GHz& 5GHz Networks): All accessories in the set are already paired before leaving the factory. This door alarm is built with a Bluetooth module. you can turn on the Bluetooth of your phone to find the available network to connect to the 2.4GHz or 5GHz wifi.
Bestseller No. 4
Alarm Lock - DL270026D Trilogy By T2 Stand Alone digital lock DL2700/26D
  • Electronic digital lock leverset is programmable through the keypad for 100 user entry codes for secure keyless entry
  • Cylindrical lock mechanism has a fixed 6-pin key cylinder with SC1 keyway for key override
  • For installation on interior doors
  • Lever handle is reversible for right- or left-hand operation, does not come with an IC Core
  • Stainless steel trim with satin chrome finish resists corrosion.Real-time automated lock/unlock schedules save manpower.Door Thickness: Fits 1 5/8" to 1 7/8"
SaleBestseller No. 5
SKK Home Security System (2nd Gen), 11-Piece Wireless Alarm System Kit, Alarm Siren, Door/Window Sensor, Remote Control, Compatible with Alexa, DIY No Monthly Fee, for House Apartment Office
  • 🔔It's a great security system for home - The 11-Piece SKK (Gen 2) wireless security system kit includes 1 base station, 2 remote, 8 entry sensors. Control SKK smart alarm system wireless anywhere, anytime via smartphone Smart Life App. It supports the expansion of up to 20 sensors and 5 remote controls. No contracts and no subscription fee.!
  • 🔔EARLY-WARNING NOTIFICATIONS - When someone illegally opens your door or window and enters your property or private place. SKK smart entry sensors will trigger the base station to send out a loud alarm, and your mobile phone has instant app notifications. Equip every door and window with the protection of the SKK security system to deter burglars and give you peace of mind.!
  • 🔔DIY INSTALLATION - SKK (Gen 2) Smart System installation is easier and simpler than previous versions. So enjoy the SKK security alarm system in minutes. No tools required. Device all wireless connection, up to 8 hours backup battery support, so it keeps protecting your property when it loses power.
  • 🔔VOICE CONTROL - SKK alarm system compatible with Alexa and Google Assistant. Away, disarm and go home modes can be easily controlled hands-free by voice. It's only works on 2. 4GHz bandwidth. ( It does not support 5GHz networks)
  • 🔔SYSTEM RELIABILITY - We have high-quality material, more stable and reliable system, almost everything in the system can be set up, the sensor has an ultra-stable connection to the base station. Available for house or apartment, for offices, garages, stores, condos. etc.
SaleBestseller No. 6
Detex EAX500 Battery Powered Door or Wall Mount Exit Alarm, 2.10" W x 2.375" D x 7.70" L
  • Low cost self contained door alarm
  • Patented plastic template for foolproof alignment
  • An intelligent circuit automatically senses the "handing" of the alarm location on the door
  • Alarm can only be silenced by proper control key
  • Piezo horn. Tamper resistant housing with cover lock
Bestseller No. 7
PoolGuard DAPT-2 Water Hazard Pool Door Alarm (Newest Version)
  • UL Listed UL 2017 (Water Hazard Entrance Door Alarm)
Bestseller No. 8
WiFi Home Security System Kit(8 Pcs) With APP, DENFOON 5 Door Window Sensor+2 Remote Control+1 Motion Detector Alarm Host with Adjustable Door Bell Chime, Voice Control with Alexa and Google Assistant
  • 【8-piece WiFi home security system kit 】The package includes 1 motion detector alarm host , 5 door alarm sensor, 2 remote control. The motion detector alarm host connects with 2.4GHz WiFi Router and the door alarm sensor connects with the motion detector alarm host.
  • 【Work with Alexa & Google Assistant】 Our home security system is compatible with Alexa and Google Assistant, very convenient to use.
  • 【Real Time Alerts】When the door or window are opened or unexpected motion is detected, the alarm host will make a sound up to 110dB and send a notification to your phone by tuya app, giving you a lot of peace of mind when you aren't home.
  • 【DIY Home Security System 】There are armed, disarmed and home modes that you can choose, also you can change detailed settings according to your needs by app,such as delay the alarm, name the alarm sensor; you can control the system by remote controller too.
  • 【With PIR】The host can work as a motion detector with PIR. What’s more, the area of the detector is cylindrical, will effectively decrease the false positive rate.
Bestseller No. 9
Door Chime HUWOO Wireless Door Open Contact Sensor Alert with 1000 FT Range 55 Ringtones and 5 Volume Levels for Business/Store/Home/Office When Entering 6 Transmitter + 2 Plug in Receiver
  • 【Easy to Install】Wireless door sensor chime installation is easier than wired installation.Just plug in the Receiver and stick the wireless door sensor on the door/window or elsewhere. After pairing, open the door and window, the receiver will ring
  • 【Door Open Chime】It will send alarms warning you if your kids who sneak out bedroom or house and will alert you if someone opens your door/window at night.Door chime can be used as a way of remind business when customers coming
  • 【Smart Door Contact Sensor】The door open alert ringtone is equipeed with 55 kinds of ringtones of different style for your choices.5 levels adjustable volume(0dB to 110 dB), The LED digital display can diaplay different numbers to help you easily distinguish which door is opened
  • 【Long Range】The signal distance of wireless door chime kit in open area is up to 1000ft Whether you are upstairs, in the garden, or a few rooms away, you can hear the bell ringing
  • 【Dont Hesite to Order】The sophisticated packaging helps you keep the door entry chime secure without worrying about losing it. If you have any questions, you can check the included user manual, and 24 hours customer services and professional technology team are standing by
Bestseller No. 10
Commercial Door Push Bar Panic Exit Device with Alarm Sprayed Aluminum
  • Requires Standard 9 Volt Battery (Not Included)
  • Cylinder & Key To Set Alarm Included
  • Alarmed Panic Device - Alarm Sounds If Push Bar Is Depressed
  • Includes Adjustable Roller Strike
  • Fasteners For Wood Or Metal Doors - Fits Either Right Or Left Hand Doors

Last update on 2022-11-08 / Affiliate links / Images from Amazon Product Advertising API

What is a smart alarm?

A smart alarm is a wireless version of a traditional burglar alarm that uses your home wifi network to connect the different components of the alarm, rather than wires. Just like a traditional alarm system, it’s made up of a siren that will trigger when any of the sensors are activated.

The two most popular types of sensors are open/close and PIR. Open/close sensors should be placed on windows or doors. They’re made up of two parts that form a connection when the door or window is closed. If the connection is broken, because the door or window has been opened and the alarm is armed, the siren will trigger.

PIR sensors detect motion and should be positioned in a hallway or other rooms that have an entry point to your home. Again, if the alarm is armed and the sensor detects motion, the siren will sound.

Some smart alarms include or can be used with wifi security cameras from the same manufacturer. Not only do these act as motion sensors but they allow you to see what’s happening in your home if the alarm has been triggered, so you’ll know if it’s a false alarm or a genuine emergency.

Unlike traditional burglar alarms, which have a control panel (usually situated in the entrance hall) that is used to arm and disarm the alarm and alert you if any sensors have been triggered, smart alarms are controlled from a smartphone app. The app lets you arm and disarm the alarm, even if you’ve already left home, and notifies you if any of the sensors have been triggered, rather than getting home to discover your siren has been sounding all afternoon (and potentially annoying your neighbours). However, smart alarms do require a hub that allows the different components to wirelessly connect. But for most smart alarms this hub can be placed anywhere in your home.

Why not simply lock the doors?

One option, of course, is to lock the doors at all times, especially when sleeping with a lock that has a specific key or number combination unknown to your loved one.

However, in the case of a fire hazard, this can be dangerous, as they may not be able to escape in time.

It is also possible that they might take offence to such constant scrutiny, especially if this practice is implemented during the day as well. It is important that patients suffering from dementia should be allowed to maintain their dignity 

What is a “door alarm”?

A door alarm is a device which detects when a door is opened and alerts others in the house/area that someone has left the house. Usually, it consists of a device mounted on the door which is integrated with an alarm or a chime that is loud enough to be heard from a distance.

Advanced options also include remote-controlled operation, remote alarm (which is not played at the door, but instead somewhere the caregiver or family member can hear it.

Some alarms are also combined with remote-sensor wrist bands that can be put on the person that needs to be tracked. This way an alarm is raised only if the person that needs to be tracked leaves the house, instead of doing it every time anyone leaves.

What are the various types of door alarms?

String alarm

A string alarm is just that – a string, connecting the door and the door frame by a magnet. When the door opens, it causes the string to detach, thus sounding an alarm. To stop the alarm, simply reconnect the magnet back in its original position.

Passive InfraRed (PIR) alarms

A PIR sensor can detect changes in the infrared radiation being emitted by an object upon it. The PIR alarm uses this technology to check if the plane across the door is changing, and raises an alarm when this plane is broken.

The great thing about PIR alarms is that they can detect a person leaving from the door even if the door is currently open. Since the technology only looks at the plane of the door and detects heat signatures in that plane, a hot body entering the plane is registered whether or not the door itself is in place. Thus an alarm is raised every time someone passes through the frame of the door.

Magnetic door alarms

A magnetic door alarm is nothing but two sensors containing magnets, one on the door and the other on the door frame, in close contact with each other.

As long as the two magnets are in each other’s presence (not more than 10-15mm apart), the alarm will remain inert. As soon as the door is opened, the connection between the two magnets is lost and an alarm is raised, and it can be reset only when the two magnets are connected back to each other.

Floor sensor alarms

Floor sensor alarms use a combination of weight sensing floor mats and door alarms. When your loved one stands on the mat, the change in weight is registered and an alarm is raised.

Floor sensor alarms can be preset to either alarm immediately or to allow a small time for the person to exit and return before sounding. Since they are pressure sensitive and not dependant on the door per se, they can be used to curb wandering at the bedside itself and can warn caregivers that much earlier.

Remote sounding alarms

If you do not wish to startle the person with dementia who is opening a door, you can use a remote sounding alarm which will sound near the caregiver instead of at the door.

These alarms typically have two parts: a transmitter which is connected to the door and is activated when it is opened, and a receiver which is placed near the caregiver and is connected with the alarm.

In the event of your loved one wandering out, the transmitter will send a signal to the receiver which will activate the alarm, thus waking up the caregiver.

Keypad locks

Keypad locks require a degree of awareness to unlock (since the combination has to be entered by hand). Therefore they can be used to prevent your loved one from wandering out.

Since keypad locks can be connected to a fire alarm/smoke detector, they aren’t a threat in case of fire, which is the problem with normal locks.

GPS alert systems

GPS is a technology used for tracking and locating things. A GPS alert system can be included in many things – even small ones like shoes, watches or bracelets. It is possible to track when a person breaches a perimeter (say 50 metres) from the house, or else you can simply track continuously.

Below are our top picks for Dementia Wandering Door Alarms.

How do the Wireless Doorbells & Monitors Work

1. The transmitter- mounted on the door and door frame with double-sided tape or screws (included with the products we tested). You need to make sure the door monitor transmitter and its side magnet are placed correctly (no more than 1/4 inch apart and properly lined up) or the product will not work.

2. The remote receiver, which provides an alert to the caregiver- this is plugged into a chosen location or carried with you, depending on the model.

When a monitored door is opened, the transmitter sends a signal to the receiver which provides an alert. You can purchase extra door transmitters for areas of the home that may also need monitoring, like the basement stairs and the front and back doors. You can also use these monitors on a refrigerator door, medicine cabinet, or kitchen cabinet door.

Main differences among the models:

  • Volume control and type of alert (chime, alarm or vibration)
  • Transmission range from the door to your receiver (75 to 150 feet)
  • How the alert is turned off (automatically or manually at the door)
  • Plug-in or portable (battery-operated) receiver for caregiver alerts.

An alert may allow you to get to the person’s side in time to accompany them outside or redirect the person from leaving home to another activity. Be sure to test the limits before depending on the device!

Make sure to check the transmission range (between the door and the receiver) may be lower than stated by the manufacturer, depending on the wall thickness and other environmental interference.

Also you should be aware that the alerts take one or two seconds to sound after the door has opened, depending on the model and the type of alert chosen. If the person is in a rush to get out the door, this type of alert may not give you enough advance notice.

Often times there are no low battery warnings on the door transmitter part and the batteries may need to be changed every few months, depending on use (see manufacturer’s instructions). You’ll need to check often to make sure the unit is working and not rely solely on this device to keep a person from wandering (or other unsafe activities).

Door Alarms for Alzheimer and Dementia Patients

As we all know, keeping an eye on a Alzheimer or dementia sufferer can be a daunting task. The danger that they wander out of the door and get lost is always there. That is why it is crucial you get to know the care receiver’s habits as they are all different.

Some people like to go wandering after they read their morning newspaper, others do so after they have had their dinner. Often times those habits are so ingrained in their previous lives that they will be impossible to change.

This is where the door alarms come in. They can be helpful in keeping  the track on your loved one. You may want to use this product along others, e.g., high and/or low sliding locks or a standard chain lock installed high or low. A chain lock may give you more time to get to the door, as the alert will sound when the door is partially opened, but the chain lock must be removed before they can exit.

These systems are not fail-proof and may not always work (even with charged batteries), so use multiple strategies when trying to prevent falls or wandering.

Below you’ll find door monitors that we’ve tested along with specific Pros and Cons for each product. We only tested products that offer a remote alert option, as alerts that only sound at the door can be upsetting to individuals with dementia.

You can also use motion sensors near the door to monitor the activity of the person you care for.

How we test

The Good Housekeeping Institute assesses the performance, ease of use and design of each smart alarm system. We test the simplicity and ease of installation and evaluate the accuracy of any motion and open/close sensors. We look at how clear and loud the siren is and whether notifications are sent in a timely fashion.

We also consider how simple the system is to arm and disarm and whether it’s possible to customise which sensors are activated at different times, to see if it’s suitable for use when you’re at home as well as away from the property.


Shed and garage burglaries are not unheard of, especially when they contain expensive garden tools, bikes, and other equipment. It is also common for burglars to target the sheds or garages of multiple homes in the same neighborhood, yet many homeowners do not realize the importance of getting a shed alarm system to keep their belongings safe.

If you own valuable lawn equipment or are a handyman who values power tools and other essentials, then getting yourself a good shed alarm system is going to be a wise choice. To make your life easier, we have combed the internet and have listed the 9 best shed alarm systems for your home.

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