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Smart Home Sensors & Detectors


SmartHome detectors and sensors are designed both for connection to central units and for stand-alone use without them. These are, for example, motion sensors, smoke, gas or CO detectors or anti-flood detectors. All the sensors work with smartphones, so you always have a full overview of what's going on in your home.

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Installing a SmartHome system is easy

The installation of various detectors and sensors is user-friendly and does not require any construction modifications or complicated wiring, as these expansion modules communicate wirelessly.

Pay attention to compatibility

When choosing expansion modules, it is important to focus on the communication protocol.

  • Some accessories require a connection to the central unit. The purchased module must be built on the same communication protocol as this unit, such as ZigBee or Z-Wave. Otherwise, the two devices will not communicate.
  • Other devices work independently, for example via Bluetooth or Apple HomeKit. They can be controlled via the manufacturer's app and don't require a central unit to work.

SmartHome detectors and sensors have many uses

There are a number of detectors and sensors on the market, so we sort them into groups for better clarity.

  • Motion detectors
  • Motion detectors for windows or doors
  • Smoke, gas or carbon monoxide detectors
  • Vibration detectors
  • Flood detectors
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321 Results
4.3
MOES Gate & Window Sensor, Zigbee
Door and Window Sensor - wireless, compatible with Tuya, battery indication, central unit required, supported OS: Android and iOS, application in Czech, application in Czech and English
12.90 €
Buy
In stock > 10 pcs
Order Code: Moes22_40
4.8 69×
TP-Link Tapo S200B, Smart button
Dimmers for controlling lights, electronics and other Tapo smart devices, adjustable actions, battery operation (1× CR2032)
16.90 €
Buy
In stock > 10 pcs
Order Code: TP22_37
4.0
Meross Smart Door and Window Sensor Kit
Door and Window Sensor - with mains + battery power, compatible with Apple Home, Samsung SmartThings and Manufacturer app, connect via WiFi 2,4 GHz, range of 100m, central unit required, supported OS: Android and iOS, application in English
Buy with code ALZADAYS25DE The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Erhalten Sie 25 % Rabatt mit dem Code ALZADAYS25DE. Das Angebot gilt bis zum 15. September 2025 oder solange der Vorrat reicht und ist nur für Endverbraucher bestimmt. 20.18 €
26.90 €
Buy
In stock > 5 pcs
Order Code: Mer24_11
4.1 17×
AQARA Motion and Light Sensor P2
Motion Sesnor , connect through Bluetooth, open system with detection motion and Light compatible with Apple Home and Aqara Home, range: lighting and security, application in English, Czech, German, Slovak and In Polish, power supply: Battery-Powered,
29.90 €
Buy
In stock 1 pcs
Order Code: Aqara24002
4.2
QINGPING Air Monitor 2 - black
Air Quality Meter - detects temperature, humidity, TVOC (volatile organic compounds), CO₂ (carbon dioxide), noise, dust particles, measurement range from 400 to 9999 ppm, temperature measurement from -10 to 60 °C, humidity measurement, battery-powered, visual signals, notifications via push notifications, display, features: hours, date and alarm clock, cover material plastic, input voltage 5 V, power cable included, standalone unit, app language: English, compatible with Android and iOS
Discounted -9 % 159.90 € 175.90 €
Buy
In stock > 5 pcs
Order Code: QGP009a
4.2
Airthings View Radon - Air Quality Monitor
Air Quality Meter is designed for indoor environments where it monitors humidity, temperature and the amount of radon in the air. You use batteries or a USB cable to power it. Easily connect the air detector to the app via Wi-Fi or HUB using Airthings Smartlink. The app is compatible with both Android and iOS operating systems. Airthings View Radon also communicates with IFTTT, Google Assistant and Amazon Alexa voice assistants.
203.90 €
Buy
In stock > 5 pcs
Order Code: Air22TNG3
4.6 13×
Shelly Blu Motion, Bluetooth
Motion Sesnor , connect through WiFi 2,4 GHz, WiFi 5 GHz and Bluetooth, open system with detection motion compatible with Samsung SmartThings, range: home control, application in English, Czech, German, Slovak and Hungarian, power supply: Battery-Powered,
28.90 €
Buy
In stock 4 pcs
Order Code: Shell23_034
4.8
Philips Hue Contact sensor Black 2pcs
Sensor - security sensor on the windows, door or safe, sends an alert or triggers a preset light alarm, includes a magnetic counterpart, IP20, can be glued or screwed (material not included), bridge required for full functionality, black, 2 pcs
66.90 €
Buy
In stock > 5 pcs
Order Code: PHLS23016
4.0
AVATTO Zigbee Smart Humidity & Temperature Sensor
Sensor -Zigbee temperature and humidity sensor, compatible with Tuya and ZigBee, Support for Alexa and Google Assistant voice control, clear LCD display, automation of ventilation, air conditioners and humidifiers, high accuracy ±1 °C / ±5 % RH, CR2430 battery power supply, table and wall mounting, white design
24.90 €
Buy
In stock > 10 pcs
Order Code: AVT061a
4.3 45×
Xiaomi Mi Wireless Switch
Smart Wireless Switch - compatible with Xiaomi Home, control via app on Android, Windows and iOS, connect via WiFi 2,4 GHz, application in English
Discounted -9 % 10.90 € 12.10 €
Buy
In stock > 10 pcs
Order Code: XI300l03
4.6 14×
iGET SECURITY P14 - wireless smoke detector for iGET SECURITY M3B and M2B
Smoke Detector - battery-powered , reaction time 1 s, acoustic, visual signals, notifications via SMS, signal volume 85 dB, features: test button, cover material plastic, operating temperature from 5 to 50 °C, operating humidity from 20 to 90 %, compatible with iGet Home, standalone unit
21.90 €
Buy
In stock 3 pcs
Order Code: NU105z
4.3 15×
FIBARO Window and door sensor 2 white
Door and Window Sensor - wireless, compatible with Manufacturer app, connect via WiFi 2,4 GHz and Bluetooth, range of 50m, central unit required, supported OS: Android and iOS, application in Czech, application in Czech and English
45.90 €
Buy
In stock 2 pcs
Order Code: FIBR02hg1
3.6
Meross Smart Water Leak Sensor
Sensor - water leak sensor, for a safe home, It works 24/7, powered by replaceable CR123A battery (lifetime 18 months), battery indicator, IP67 waterproof, alerts via the app, 60 dB alarm, Meross Hub central unit is required for sensor functionality
Buy with code ALZADAYS25DE The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Erhalten Sie 25 % Rabatt mit dem Code ALZADAYS25DE. Das Angebot gilt bis zum 15. September 2025 oder solange der Vorrat reicht und ist nur für Endverbraucher bestimmt. 14.93 €
19.90 €
Buy
In stock > 10 pcs
Order Code: Mer24_14
4.0
iQtech SmartLife TH01 Wi-Fi Temperature and Humidity Sensor with Display
Sensor iQtech® SmartLife TH01 Wi-Fi Temperature and Humidity Sensor with Display
32.90 €
Buy
In stock 4 pcs
Order Code: iQtech23_02
4.4
Honeywell Home R200ST-N2 Interconnected fire alarm detector - smoke (optical) and temperature princi
Smoke Detector - temperature measurement from 0 to 70 °C, battery-powered , acoustic signals, signal volume 85 dB, features: test button, cover material plastic, operating temperature to 40 °C, operating humidity up to 93 %, input voltage 3V, battery included, standalone unit
Buy with code ALZADAYS10DE The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Erhalten Sie 10 % Rabatt mit dem Code ALZADAYS10DE. Das Angebot gilt bis zum 15. September 2025 oder solange der Vorrat reicht und ist nur für Endverbraucher bestimmt. 42.21 €
46.90 €
Buy
In stock > 5 pcs
Order Code: HNW22_06
4.4 28×
Gosund Smart Window/Door Sensor, Zigbee
Door and Window Sensor - wireless, compatible with Tuya, Smartlife and Manufacturer app, connect via WiFi 2,4 GHz, separately functional unit, supported OS: Android and iOS, application in Czech, application in Czech and English
11.90 €
Buy
In stock > 10 pcs
Order Code: GoSnd31
4.5 20×
Airbi CO2AIR digital carbon dioxide meter
Detector - CO₂ (carbon dioxide) detection, measurement range from 400 to 2400 ppm, mains + battery power, reaction time 6 s, display, independently functional unit
79.90 €
Buy
In stock > 5 pcs
Order Code: Airbi24001
5.0
Eve Water Guard - Water Leak Detector - compatible with Thread
Water Leak Detector - detects water gas, mains power, sound level: 100dB, compatible with Apple Home, Apple Siri shortcuts and Samsung SmartThings, connect via Bluetooth, standalone functional unit, app with English language support for iOS
95.90 €
Buy
In stock 3 pcs
Order Code: Eve22_001
3.7 24×
iGET SECURITY EP1 - wireless PIR motion sensor for iGET M5-4G alarm
Detector PIR motion sensor for iGET SECURITY M5 alarm. Protection against sabotage, highest transmission security 256bit, very long battery life of 5 years, the alarm constantly monitors the activity of this sensor, also a signal, battery percentage and more. Special magnetic holder for attachment containing trigger.
27.90 €
Buy
In stock > 5 pcs
Order Code: iGt21015
4.0
Philips Hue Contact sensor White
Sensor - security sensor on the windows, door or safe, sends an alert or triggers a preset light alarm, includes a magnetic counterpart, IP20, can be glued or screwed (material not included), bridge required for full functionality, White colour
38.90 €
Buy
In stock 2 pcs
Order Code: PHLS23015
4.5 26×
IMMAX NEO 3x Smart magnetic sensor for doors and windows, Zigbee 3.0
Detector - Smart magnetic sensor for windows and doors to secure your home, ZigBee 3.0, three pieces in the package, CR2032 battery, Immax NEO PRO app in Czech and 60 other languages compatible with iOS, Android, with Amazon Alexa voice assistants, Apple Siri Shortcuts, Google Assistant and TUYA systems, LIDL
37.90 €
Buy
In stock > 5 pcs
Order Code: IMMX_22_30
4.6 33×
TESLA Smart Sensor Siren
Siren - open system, area of use: security, OS supported: Android and iOS, compatible with Tuya, Smartlife and Tesla Smart, power supply: Power plug and Battery-Powered, in Czech and English
25.90 €
Buy
In stock 1 pcs
Order Code: Tsl_22_32
4.9 11×
SONOFF IP65 Zigbee LCD Smart Thermometer (Probe Version) SNZB-02LD
Digital Thermometer – IP65 waterproof design with 1.5m probe, temperature measurement even in liquids and confined spaces, 2.2″ LCD display, accuracy ±0.2 °C, measurement history up to 180 days, smart scenes and notifications, compatible with voice assistants, Zigbee 3.0 compatible
31.90 €
Buy
In stock 2 pcs
Order Code: SNFa117
4.8 43×
IMMAX NEO Smart magnetic sensor for doors and windows, Zigbee 3.0
Detector - protects your home, requires connection to a smart gateway or other Zigbee 3.0 hub, alerts via mobile app, range up to 30 m, runs on a 3V CR2032 battery
Buy with code ALZADAYS30DE The discount code gives the option of applying a discount on a given product when entering the code in the shopping cart. Erhalten Sie 30 % Rabatt mit dem Code ALZADAYS30DE. Das Angebot gilt bis zum 15. September 2025 oder solange der Vorrat reicht und ist nur für Endverbraucher bestimmt. 10.43 €
14.90 €
Buy
In stock > 10 pcs
Order Code: IMMX_22_31
In the category Smart Home Sensors & Detectors on Alza.de, we currently have a total of 321 products, which you can easily buy online and get quickly delivered. See all of your purchases and make orders on our easy-to-use app.
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