Best window and door detector

Open or closed?

Entry Sensor

Imagine always having a frient keeping an eye on doors and windows in your home. Someone who lets you know if you forgot to close a window. A frient who warns you if someone enters your home when you’re away. Someone who wants you to enjoy being away on vacation – and not worry about the safety of your home while you’re gone.

Now that’s a frient!

One step ahead of intruders

Placed on a door or a window, the Entry Sensor tracks when it's opened and closed. You'll have peace of mind, knowing that your home is safe - no matter if you're at home or away.

With this new frient, you'll be alerted immediately if someone is opening a window or door in your home – allowing you to act before the intruder does.

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That's what frients are for

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Watch over your loved ones

Keeping your home and family safe and secure is a top priority. Use the friently sensor to make sure you're kids are home from school in time or check, how often your elderly relative leaves the house.

Trust your frient to keep an eye on your loved ones - and don't worry about the sensor running out of battery. With its long battery lifetime, your frient will always be there to watch out for your home and your family.

Wanna be frients?

Popular smart home security device

Frients with...

*Not all features supported by all hubs.

What your frient can do

Choose between two versions of the friently entry sensor to find a frient who does exactly what you need him to.

Entry Sensor

Open / Close


Temperature Sensor

Tamper protection

Screw mounting

Get this frient

Entry Sensor Pro

Open / Close


Temperature sensor

Tamper protection

Screw mounting

Check out the pro

Reviews from friends of frient

See what other people have to say about this frient

Just what I needed
I needed a Smartthings compatible door opening detector. Put the battery, pair it with the Smartthings app and working! Nice design, quality materials.
Good sensor
Good sensor, it takes standard AAA batteries so you can put rechargeable in it and easier to find of course. Connected with smartthings easily.


Communication protocol: Zigbee
Battery: 2 x AAA, exchangeable
Battery life: 9 years of battery life, when reporting every 2 minutes
IP class: IP40
Operation temperature 0 to +50°C
Color: White

See all specifications


  • Dimensions:
    Sensor: 76 x 26 x 17 mm
    Magnet: 30 x 12 x 9 mm
  • Colour: White

Power supply

  • Battery: 2 x AAA, exchangeable
  • Battery life: 9 years of battery life, when reporting every 2 min
  • Battery level and low battery warning can be reported


  • Operation temperature: 0 to +50°C
  • IP class: IP40
  • Relative humidity 5% - 85%, non condensing


  • Sensitivity: -98 dBm
  • Output power: +8 dBm

Specifications detection sensor

  • Magnetic: 0.1 - 1.0 cm


Wireless protocol

  • Zigbee home automation 1.2
  • Zigbee end-device


  • Conforming to CE, RoHS and REACH directives
Best window and door sensor
Most popular smart home device

Get started with your new frient

Download the installation manual here.

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