Alarm will sound when door or window is opened.
eBay
Aqara Zigbee Submersion Sensor Water Overflow Leak Detector Alarm Security Immersion Sensor IP67 Waterproof for Mi Home Homekit
Aliexpress UK
Compact size alarm. Sensor type: alarm. - Magnetic sensor switch detects entry. Wireless magnetic sensor switch. Alarm type: sound. Test the setup by switching on the system of the main unit and see whether the alarm can be triggered by opening the door/windows.
eBay
Aqara Water Leak Sensor E1 Zigbee Soaking Sensor Flood Water Leak Detector Alarm Security Smart Home for Mi Home Apple Homekit
Aliexpress UK
Descriptions:Switch Type: NC(normal closed type), the circuit is closed normally, and, that if a magnet not near it, the circuit open. It consists of a pair of contacts on ferrous metal reed in a hermetically sealed glass envelope. There are two types of reed switches: normally open reed switches and normally closed reed switches. In the presence of a magnetic field, the contacts of a normally-open reed switch will close. A normally-closed reed switch is closed when it is not near a magnet; as a magnet is brought close to it, a normally-closed switch will open. .
eBay
Mini Wireless Alarm Door Stop Alarm 120dB Great for Home Wedge Shaped Stopper Alert Security System Block Blocking System
Aliexpress UK
Open the door and see if the siren sounds. 10X alarm unit. Sensor type: alarm. Magnetic sensor: 9X3X2CM. Alarm type: sound. Alarm unit: 4.5X1.5X1.5CM. Fix the host to the door / window with double-sided tape.
eBay
2-YEAR BATTERY LIFE: One CR-123A battery provides monitoring for 730 days. FOR DOORS AND WINDOWS: Small and compact design fits onto any door or window frame. 100-DECIBEL SIREN: If a forced entry is detected, a siren as loud as a jackhammer will be...
eufy
Simplisafe Alarm With Keypad And Door Sensor
eBay
2-YEAR BATTERY LIFE: One CR-123A battery provides monitoring for 730 days. FOR DOORS AND WINDOWS: Small and compact design fits onto any door or window frame. 100-DECIBEL SIREN: If a forced entry is detected, a siren as loud as a jackhammer will be...
eufy
Our PROFESSIONAL surface mounting Door Contacts are very handy, not only can you fix them to traditional wooden and UPVC doors, you can also use them to protect windows and even garage doors!, They are constructed of plastic and have an operating gap of 20mm. Silver screw terminals indicate alarm circuit, Brass screws are used for terminating a tamper circuit or spare cables. Circuit is normally closed going open in alarm. (contact and magnet together - circuit closed, contact and magnet separated - circuit open) Designed to be added to our Intruder Alarm Kits or virtually any wired burglar alarm system for example they are compatible with - ADE, Texecom, Eurosec, Scantronic, Ademco, C&K and many others! Do Not confuse this with similar item offered by other sellers, this is a.
eBay
2-YEAR BATTERY LIFE: One CR-123A battery provides monitoring for 730 days. FOR DOORS AND WINDOWS: Small and compact design fits onto any door or window frame. 100-DECIBEL SIREN: If a forced entry is detected, a siren as loud as a jackhammer will be...
eufy
Set of 4 spacers: 5mm, 10mm, 15mm and 20mm for both magnet and sensor. Spacers can be attached using double sided tape or (where allows) screws. We want you to be 100% satisfied. 100% Genuine Manufacturer Parts.
eBay
KERUI M521 Wireless Doorbell Outdoor Smart Home Security Welcome Chime Kit 57 Songs Door Bell Alarm LED Light Waterproof Button
Aliexpress UK
Wireless Technology: ZigBee. Easy installation with double-side tape,simply stick it anywhere you like to protect your house security. Battery powered for low power consumption;New designed with hall sensing technology and tamper protection;Low battery reminder supported.
eBay
Smart Wireless Doorbell Remote US Plug Reception High Volume 4 Volume Adjustable Chime Security Alarm Call Door Receive Tools
Aliexpress UK