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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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526 Results
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MDT Technologies KNX occupancy sensor 360° L3, temperature measurement, matt white
Sensor - Occupancy detector with 3 sensors, temperature sensor and integrated white LED orientation light, version for installation in hollow ceilings, temperature sensor, 3 sensors, ceiling installation
204.65 €
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In stock 1 pcs at the supplier's
Order Code: MDTT24312
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MDT Technologies KNX occupancy sensor 360°, 3 Pyro, brightness measurement, matt white
Sensor - The MDT presence detector is available in several versions, up to 4 pyrosensors and a high-resolution lens, white, ceiling installer, Channel Hkl, Reach 11m, max. range (Ø) presence 5m
188.45 €
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In stock 2 pcs at the supplier's
Order Code: MDTT24306
4.6 144×
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SONOFF ZB SNZB-02D SMART Temperature & Humidity sensor
Sensor - temperature measurement in °C or F, measurement of humidity in %, 2.5" display, data recovery every 5 seconds, Zigbee 3.0, mobile apps, notifications, support for voice assistants, battery operation (CR2450)
16.90 €
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On the way > 5 pcs
Expected 30/08/2026
Order Code: SNFa073
4.5 53×
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SONOFF Zigbee Temperature and Humidity Sensor
Sensor - senses the temperature and humidity in the room, support for smart scenes, can be fixed to the wall with 3M tape or screw, ZigBee 3.0 protocol, requires a ZigBee Hub, compatible with Amazon Alexa and Google Home, runs on a CR2477 battery, mobile applications
16.90 €
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On the way > 5 pcs
Expected 30/08/2026
Order Code: Sonoff23_03
4.7 32×
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SONOFF SNZB-05P Zigbee Water Leak Sensor & Detection Cable
Water Leak Detector - detects Water gas, battery-powered, range: 130 m, compatible with Samsung SmartThings, IFTTT and eWeLink, central unit required to function,, app with Czech language support, app with Czech and English language support for Android and iOS
20.90 €
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On the way > 5 pcs
Expected 06/10/2026
Order Code: SNFa110
4.8 10×
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Philips Hue Contact sensor Black
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
43.90 €
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On the way 1 pcs
Expected 07/09/2026
Order Code: PHLS23014
5.0
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SONOFF SenseGuard Series SenseGuard DW Gen2 Zigbee Door/Window Sensor
Door and Window Sensor - wireless, compatible with eWeLink, connect via Radio frequency, range of 100m, central unit required, supported OS: Android and iOS
14.90 €
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On the way > 5 pcs
Expected 06/10/2026
Order Code: SNF2623
2.5
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Sonoff MS01 Smart Soil Moisture Sensor
Sensor - humidity sensor, waterproof (IP55), compatible with Sonoff TH Origin/Elite sensor, cable 50 cm long, support for voice assistants, operating temperature 0 to 60 °C, humidity measurement 0-99% RH, RJ9 4P4C connector
18.90 €
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On the way > 5 pcs
Expected 06/10/2026
Order Code: SNFa058
4.7 13×
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FIBARO Smoke Sensor
Smoke Detector - detects temperature, temperature measurement from -20 to 100 °C, battery-powered , acoustic, visual signals, signal volume 85 dB, battery indication, features: alarm, operating temperature from 0 to 55 °C, operating humidity from 0 to 93 %, battery included, standalone unit requires a central hub, app language options: Czech and English
79.90 €
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Ordered on request
Order Code: FIBR01f
4.0 33×
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IMMAX NEO LITE Smart pool temperature sensor + 2x indoor temperature and humidity sensor
Temperature Sensor - TUYA, 2.4GHz WiFi connection, indoor and outdoor unit, monitoring the current pool water temperature, indoor temperature and humidity, date and time controlled from the internet with manual settings, alarm clock with snooze option, viewing the measured values in Immax NEO PRO, iOS compatible, Android, supports Apple Siri shortcuts, TUYA and LIDL systems
49.90 €
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Ordered on request
Order Code: IMMX25001
5.0
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Ajax CombiProtect White
Motion Sesnor , connect through Radio frequency, open system with detection motion compatible with Ajax and Manufacturer app, range: security, application in English and Czech, power supply: Battery-Powered,
119.64 €
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Ordered on request
Order Code: AJAX7170
3.0
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Imou gas sensor/detector ZGA1
Gas Leak Detector - mains power supply, detection reach 200 m, acoustic, visual signals, notifications via push notifications, signal volume 85 dB, features self-diagnostics, automatic scenarios and alarm, cover material plastic, power adapter and mounting kit included, requires a central hub, app language: English , compatible with Android and iOS
29.90 €
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Ordered on request
Order Code: Imou23_40
5.0
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EVOLVEO Alarmex Pro (ACSALMSMK) wireless smoke detector
Smoke Detector - mains power supply, detection reach 80 m, acoustic signals, signal volume 90 dB, features: test button, cover material plastic, operating temperature from 0 to 55 °C, input voltage 9 V, standalone unit requires a central hub
29.90 €
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Ordered on request
Order Code: EVO22_08
4.5 23×
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Shelly Gen3 H&T, battery operated temperature and humidity sensor with display, WiFi, ivory
Detector - battery operated temperature and humidity sensor with display, WiFi, ivory
45.90 €
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Ordered on request
Order Code: Shell24_011
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Ajax MotionCam Black
Motion Sesnor , connect through Radio frequency, closed system with detection motion compatible with Ajax, range: security, application in English, Czech, German and Slovak, power supply: Battery-Powered,
167.92 €
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Ordered on request
Order Code: AJAX20001
3.0
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EMOS GoSmart PIR sensor (motion sensor) with night light, Wi-Fi
Motion Sesnor , connect through WiFi 2,4 GHz, open system with detection motion compatible with Tuya, Lidl Home, Smartlife, EMOS GoSmart and Manufacturer app, range: lighting, application in English, Czech, German, Slovak, Hungarian and In Polish, power supply: Power plug,
22.31 €
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Ordered on request
Order Code: EMOS24145
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EMOS GoSmart Water Leak Detector P56000S, ZigBee
Water Leak Detector - detects Water gas, battery-powered, sound level: 85dB, compatible with Tuya, Lidl Home, Smartlife, EMOS GoSmart and Manufacturer app, battery indication, central unit required to function,, app with Czech language support, app with Czech and English language support for Android and iOS
28.16 €
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Ordered on request
Order Code: EMOS24054
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EMOS Microwave sensor (motion sensor) IP20, 1200 W, 360°, built-in
Motion Sesnor with detection motion, range: lighting, power supply: Power plug,
Great price 20.21 €
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Ordered on request
Order Code: EMOS26068
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iGET SECURITY MP14, for M6-4G alarm or standalone
Smoke Detector - battery-powered , detection reach 500 m, acoustic, visual signals, notifications via push notifications, signal volume 85 dB, battery indication, features: alarm, cover material plastic, operating temperature from 0 to 40 °C, operating humidity from 10 to 90 %, ingress protection IP20, input voltage 3V, battery and mounting kit included, standalone unit requires a central hub, app language options: Czech and English , compatible with Android and iOS
New arrival 33.90 €
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Ordered on request
Order Code: IGET26009
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iGET SECURITY MP19, Wireless Carbon Monoxide (CO) Detector for M6-4G
Gas Leak Detector - detects CO (carbon monoxide), measurement range from 50 to 300 ppm, gas detection sensitivity 100 ppm, battery-powered, detection reach 500 m, acoustic, visual signals, notifications via push notifications, signal volume 85 dB, battery indication, features alarm, cover material plastic, operating temperature from -10 to 50 °C, operating humidity from 30 to 95 %, ingress protection IP20, input voltage 3V, battery and mounting kit included, standalone unit requires a central hub, app language options: Czech and English , compatible with Android and iOS
New arrival 41.91 €
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Ordered on request
Order Code: IGET26010
4.8 30×
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iGET SECURITY M3P1 - wireless PIR motion detector for iGET SECURITY M3 and M4
Motion Sesnor , connect through Radio frequency, open system with detection motion, range: security, power supply: Battery-Powered,
from  17.15 €
Currently Unavailable
Order Code: NU106b
5.0 12×
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Ajax MotionProtect White
Motion Sesnor , connect through Radio frequency with detection motion compatible with Ajax, range: security, application in English and Czech, power supply: Battery-Powered,
88.93 €
Currently Unavailable
Order Code: AJAX5328
3.9
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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
207.90 €
Currently Unavailable
Order Code: QGP009a
4.8 23×
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SwitchBot Thermometer & Hygrometer Plus
Sensor - temperature measurement in °C or F, measurement of humidity in %, 3" LCD display, data recovery every 4 seconds, mobile apps, notifications, support for voice assistants, the possibility of inclusion in the SwitchBot ecosystem, battery operation (2× AAA)
16.90 €
Currently Unavailable
Order Code: SwBot21_19
In the category Smart Home Sensors & Detectors on Alza.sk, we currently have a total of 526 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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