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Top User RatedSonoff SNZB-04P Wireless Contact Sensor ZigBee
Installation: Sticker
from9,51 € at 21 stores 
Shelly SBDW
17,36 € at 13 stores
V-TAC Wireless Contact Sensor Wi-Fi
from16,20 € at 2 storesAvatto Wireless Contact Sensor Wi-Fi
from8,99 € at 4 storesTellur Wireless Contact Sensor Wi-Fi
from29,90 € at 3 storesMC55 Ασύρματος Αισθητήρας Επαφής Wi-Fi & RF 433MHz 100x50x80mm 1676476558
Frequency: 433MHz, Installation: Screws
HomeMatic HmIP-SWDO-2 v2 Wireless Door/Window Contact Sensor
Frequency: 868MHz, Installation: Sticker, Screws
from67,69 € at 2 storesSuperior Electronics Ασύρματος Αισθητήρας Επαφής Wi-Fi & RF 433MHz SUPiSW001
Frequency: 433MHz, Installation: Screws
from16,60 € at 6 stores
Filters
- Wireless: Connects to the installation system via a wireless communication protocol. Powered by battery.
- Wired: It connects to the installation system via cable.
- The wireless communication protocol supported by the contact for connecting to the alarm system or other devices.
- Contact NC: The circuit is closed when the door is closed. When the door opens, the circuit also opens and the alarm is triggered. It offers maximum security because it is activated even if the cable is cut.
- Contact NO: The circuit is open when the door is closed. When the door opens, the circuit closes and the alarm is triggered. It is used only in special or older installations where the alarm panel requires it.
- Metallic: Heavy-duty metal contact suitable for use on iron doors, shutters, garage doors, etc.
- Tamper Protection: It refers to protection against attempts to tamper with the device. For example, if someone tries to open the sensor’s casing or remove it from its position, the sensor will send an alarm signal.
- The alarm system or device to which the door sensor will be wirelessly connected must have the same frequency in order to operate.
- The network of smart devices to which the sensor can connect. Smart devices within the same ecosystem as the sensor can communicate and connect with each other more easily, allowing for automations and unified control.
- Alexa: Amazon’s automation platform based on the Alexa voice assistant. It offers voice control capabilities and the creation of “Skills” for connecting and automatically coordinating multiple smart devices.
- Apple HomeKit: Apple’s ecosystem that allows secure control of the device from an iPhone, iPad, or Apple Watch. Supports voice commands via Siri and the creation of automations through the Home app.
- Google Home: Google’s platform for managing and controlling smart devices. It allows operation via Google Assistant with voice commands in Greek and the integration of the device into automated routines.
- IFTTT: Automation ecosystem that connects the device with apps and other smart gadgets. Allows the creation of smart scenarios (Applets) for automatic operation based on location, weather, or other digital notifications.