ONVIS Security Contact Sensor – HomeKit, BLE 5.0

Availability: In stock
Product code
ONV-CT2
What else should start up your smart home than its own security? Onvis – a certified specialist in the HomeKit version of sensors, alarms, cameras, and plugs, allows you to secure your home or office, create custom automation, and control and monitor them remotely from an iPhone or Apple Watch.

The Onvis CT2 wireless smart magnetic sensor immediately notifies you about an open door or window. After setting up automation, the sensor can also start other processes, such as turn on smart lights or turn off the thermostat.

The sensor is compatible with the Apple HomeKit and communicates wirelessly with the control panel of your smart home using a Bluetooth connection. That is why you can know at any time and from anywhere in what condition the guarded entrance is.

• Displays status messages and sends push notifications
• Compatible with Apple HomeKit and Home app
• Allows to set up automation and scenes
• Status change notifications in real-time
• Easy installation, CZ manual
• 24/7 remote monitoring
• Records of the last 30 days

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ONVIS Magnetický senzor na dveře / okna – HomeKit, BLE 5.0

How does the sensor work in HomeKit?

The Onvis CT2 sensor paired with your HomeKit hub sends instant push notifications when the sensor is activated. This means that you will immediately know that the door (window) is open. This makes it easy for you to get a reliable 24/7 overview of the security of your home, garage, office, or warehouse.

Create useful automations

Switching on the sensor can also serve as a part of automation, which will save you energy or make your stay at home more pleasant. With the help of other smart accessories, you can create various automation or help children, the elderly, or pets:

  • Turn on the light in the hallway in case they arrive after sunset
  • Turn on the garden lights when you leave the house
  • Turn off the heating or air conditioning when a window is open
  • Turn off the vent when you leave the bathroom and others


  • funkce smart magnetického hlásiče otevření dveří Onvis CT2

    The sensor is set in a moment

    The sensor is ready for installation immediately after unpacking. Spacers, replaceable button battery, miniature design and manual allow you to place the sensor anywhere with no problems. With the accompanying Onvis Home or Apple Home application, paired with your HomeKit hub will be complete in a few minutes. Thanks to the Bluetooth 5.0 wireless connection with minimal energy consumption, the sensor lasts up to 1 year in standby mode.



    Onvis Home Application


    Free accompanying Onvis Home app for iPhone, iPad, iPod Touch and Apple Watch with iOS 12.0+ and WatchOS 4.0+.


    What can you see in the app?

    In the Onvis Home or Apple Home application, you can clearly view the records of sensor activity for the last 30 days. Under normal circumstances, or whenever you leave in a hurry, you can always conveniently check whether your door / window / cabinet / gate / garage door is closed or not. Just look at your iPhone, iPad, or Apple Watch.

    Information overview

  • Wireless magnetic smart sensor
  • Displays status messages and sends push notifications
  • Activity records for the last 30 days
  • Compatible with Apple HomeKit and Home application
  • Bluetooth 5.0 technology
  • Battery lasts for up to 1 year
  • Accompanying application Onvis Home
  • Allows you to set up automation with the help of other smart devices

  • Unboxing, setup and overview


    Technical specifications

  • Battery: CR2450, 650 mAh (included)
  • Wireless connection: Bluetooth Low Energy 5.0
  • Requires pairing with an iOS device that serves as a home hub to operate
  • Remote monitoring of the sensor status requires a permanent placement of the hub within the Bluetooth range of the sensor
  • Operating temperature: 10 ° C ~ 45 ° C
  • Operating humidity: 5 % ~ 95 % RH
  • Dimensions: sensor 30 x 46 x 15 mm, magnet 12 x 26 x 10,5 mm
  • Weight: 24 g
  • Colour: white
  • Use: indoors only
  • Location: any; windows, doors
  • Installation: with the help of the enclosed spacers and adhesive tape
  • Placement during installation: sensor left, magnet right
  • Mounting gap between the magnet and sensor max. 2 cm

  • Documents

  • User manual (EN, DE, FR, ES, IT; PDF, 4 MB)
  • CE certificate


  • Onvis logo

    The Onvis brand team has extensive experience in the development and production of smart devices for the smart home. They specialize in the development of smart electronics with support for the HomeKit protocol and as such, they also received Apple HomeKit certification. That is not the only reason why Onvis has become one of the most reliable manufacturers of HomeKit devices for your smart home. In the Onvis product portfolio, you can find, for example, smart motion sensors, IP cameras, smart plugs, or alarms, thanks to which you can set up automation and make full use of your smart home.

    More Information
    Product code ONV-CT2
    Barcode 0715444634666
    Color White
    Manufacturer Onvis
    Manufacturer's website http://www.onvistech.com