what are the dimensions of the sensors

Sensor Unit = W = 41mm D = 22mm H = 12mm Magnet Unit W = 25mm H = 10mm D = 10mm Hope this helps.

Does this device trigger Alexa routines?

So long as you have the gateway device, e.g. the E1, then yes. Otherwise it will be detected in Alexa but you cannot use it for anything.

do these things work with ZHA (in home assistant) or do i need zigbee2mqtt?

According to my Home Assistant friend the aqara devices work in Home assistant, but if you do use Home Assistant you can't use the Aqara App also. Only one or the other not both together. Hope this helps.

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Zigbee Door and Window Sensor 3Pack, Aqara Hub Required

Product ID: 447422647

Details

Brand
Aqara
Item dimensions L x W x H
41 x 22 x 11
Item weight
46.5 Grams
Mounting type
Window Mount
Style
Door and

📶2.4 GHz Wi-Fi compatible

🔔Instant unauthorized entry alerts

🤖Seamless smart home automation

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Description

🔐 Secure smarter, live freer — your home’s silent guardian.

WIDE COMPATIBILITY - Fits doors, windows, drawers, and cabinets with up to 22mm gap—versatility that adapts to your home.
RELIABLE SCALABLE - Connect up to 32 devices with one Aqara Hub, backed by 12-month support for peace of mind.
SMART HOME INTEGRATION - Effortlessly control other Aqara devices based on door/window status for a truly connected lifestyle.
INSTANT SECURITY ALERTS - Get notified the moment your door or window opens unexpectedly, keeping you one step ahead.
VOICE ACTIVATED CONVENIENCE - Hands-free control via Apple HomeKit and Alexa—security that listens to you.

The Aqara Zigbee Door and Window Sensor 3Pack offers wireless, real-time security alerts and smart home automation compatibility. Designed for doors, windows, and similar fixtures with up to 22mm gaps, it requires the Aqara Hub (sold separately) and a 2.4 GHz Wi-Fi network. Compatible with Apple HomeKit and Alexa, it supports up to 32 devices per hub, delivering scalable, voice-controlled home security with reliable after-sales support.

Specifications

ASIN	B09TP7VMKB
Best Sellers Rank	5,407 in DIY & Tools ( See Top 100 in DIY & Tools ) 4 in Home Security Door & Window Sensors
Brand	Aqara
Country Of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (1,594)
Item Dimensions	41 x 22 x 11 millimetres
Item Weight	46.5 Grams
Manufacturer	Aqara
Manufacturer Part Number	TZ-006
Model Number	MCCGQ11LM
Mounting Type	Window Mount or Door Mount
Number of Items	3
Number of Packs	3
Specific Uses For Product	home security, home automation
Style Name	Door and Window Sensor*3

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₨48598

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In stock

Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Sri Lanka.

Secure transaction

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