• AjarSense™ - 50% OFF TODAY

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 Rated 4.8 Excellent - Trusted By 17,000+

AjarSense ™

$119.99
$119.99
SAVE Liquid error (snippets/price line 116): Computation results in '-Infinity'% Sold out
 

check_circle Know instantly when a door's left ajar

check_circle Get instant push alerts wherever you are

check_circle Monitor every door with zero monthly fees

check_circle Peel, stick, and start monitoring in minutes

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My son sleepwalks, so I put AjarSense on his bedroom door and finally sleep through the night. It catches the door the second it's nudged ajar, not only once it's wide open like our old sensor did. Total peace of mind.

Verified Buyer - Marcus T.

  • Peel off the backing and press the sensor onto any door, window, or gate — no tools or drilling needed.
  • Pair it with your Zigbee hub through the companion app in a few taps.
  • The sensor detects the instant the door separates from the frame, even barely ajar, and sends a push alert to your phone.
  • Ask Alexa or Google Home to check any door's status hands-free.

  • 1 x AjarSense Door Sensor
  • 1 x Replaceable Battery
  • 2 x Double-Sided Adhesive Strips
  • 1 x Quick-Start User Guide
  • Note: A compatible Zigbee hub is required and sold separately

We offer free shipping for all orders. Once your item/s is dispatched,
the estimated delivery time is:

- USA: 2-9 business days
- UK: 5-13 business days
- Australia: 5-13 business days
- Canada: 2-12 business days
- Europe: 5-13 business days

You have 90 days to return your product for a full refund (return shipping is covered by the customer; defective items ship a free replacement).

✓ Official Authorized Retailer

This product is not available on Amazon or eBay. You are purchasing directly from the only authorized seller — which means full warranty, verified authenticity, and dedicated customer support. Beware of counterfeit listings on third-party marketplaces.

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AjarSense

 4.8/5
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  • Over 17,000 recommend AjarSense

Built to Catch Every Door Left Ajar or Open

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Instant Alerts for Every Ajar Door

The sensor detects the instant a door separates from its frame, even barely ajar. That triggers a push notification straight to your phone.

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A Steadier Signal Than Wi-Fi Sensors

AjarSense runs on Zigbee, not Wi-Fi, so it isn't fighting your other devices for bandwidth. That keeps the connection steady in garages and far rooms.

AjarSense
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Hands-Free Voice Control

Ask Alexa or Google Home whether a door's open before you leave for work, or set a routine around it. No app needed for a quick voice check.

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Battery Life Built to Last Months

Zigbee's low power draw lets AjarSense run for months on one battery, not the frequent swaps some Wi-Fi sensors need. Less time on maintenance.

What our 17,000+ Customers say

Based On Real and Honest Experiences

My son sleepwalks, so I put AjarSense on his bedroom door and finally sleep through the night. It catches the door the second it's nudged ajar, not only once it's wide open like our old sensor did. Total peace of mind.

Marcus T.Verified Buyer

I put AjarSense on the kitchen window, the one spot I always forget to check before bed. Now I open the app and see it's closed in a few seconds instead of walking downstairs to look. It's become part of my nightly routine.

Elena R.Verified Buyer

I almost skipped AjarSense, figuring it'd be another gadget I forget about within a week. Setup took less than five minutes, and now Alexa runs a routine off it every time the door opens. It's the rare gadget I actually use every day.

James K.Verified Buyer

Frequently Asked Questions

verified +347 experts reviewed it as the best choice in 2026
Q1 Do I need a Zigbee hub to use this sensor?
Yes. AjarSense pairs through a Zigbee hub to send alerts to your phone. Many households already have a compatible hub in their existing setup, and pairing a new one typically takes only a few minutes.
Q2 Will it work with my Alexa or Google Home setup?
Yes. Once paired with your Zigbee hub, AjarSense connects to Alexa and Google Home, so you can check a door's status by voice or build routines around it, like lights turning on when it opens.
Q3 How long does the battery actually last in real use?
Thanks to Zigbee's low power draw, AjarSense is built to run for months on a single battery instead of the frequent swaps some Wi-Fi sensors need. It's one less thing to remember around the house.
Q4 Is setup complicated?
Not at all. Peel off the adhesive backing and press AjarSense onto your door, window, or gate — no tools, no drilling. Pair it with your hub through the app, and you're up and running in minutes.
Q5 Will I get notified if I'm away from home?
Yes. The moment a door is nudged open, AjarSense sends a signal through your Zigbee hub to the app, which pushes the alert straight to your phone, whether you're at work, asleep, or across the country.
Q6 What happens if my internet goes down?
AjarSense talks to your hub over Zigbee, not Wi-Fi, so the sensor itself stays connected either way. Your hub still needs internet to push alerts to your phone, though some hubs keep local routines running without it.
Q7 Will it give false alarms or stop working over time?
AjarSense runs on Zigbee instead of Wi-Fi, so it isn't competing for bandwidth or dropping off when your router hiccups, which are common causes of missed alerts and false alarms on Wi-Fi-only sensors.
Q8 Are there any hidden subscription costs?
None. AjarSense and its companion app are free to use, so once you own the sensor and a compatible hub, monitoring every door in your home costs nothing extra, month after month.
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