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Hundreds of categories, thousands of products, millions of details and user reviews for detectors. How can you make sense of all of this? Try our Alza Test, which guarantees an objective selection based on customers' experiences. How the products from detectors rank are based solely on various data and feedback from actual people who have purchased the products.

All detectors
All from 361
FIBARO Flood Sensor - Water Leak Detector
FIBARO Flood Sensor
-8 % off new 1,889,- New 2,059,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Water Leak Detector - detects temperature and water gas, battery-powered, connect via Bluetooth, standalone functional unit,, app with Czech language support, app with Czech and...
GARNI 210T OneCare - Air Quality Meter
GARNI 210T OneCare
-8 % off new 2,289,- New 2,489,-
Unsealed - in stock 3 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Air Quality Meter - detects temperature, humidity, dust particles, temperature measurement from -10 to 50 °C with accuracy 0.8 °C, humidity measurement with accuracy 5 %, mains +...
Airthings Corentium Home 2 - Smart radon detector - Air Quality Meter
Airthings Corentium Home 2 - Smart radon detector
-1 % off new 4,399,- New 4,449,-
From 101,- per month
Unsealed - in stock 2 pcs
Air Quality Meter - detects temperature, humidity, radon, battery-powered, visual signals, notifications via push notifications, display, operating temperature from 4 to 40 °C,...
Flammable and Explosive Gas Detector SAFE 808L (Natural Gas) - Gas Leak Detector
Flammable and Explosive Gas Detector SAFE 808L (Natural Gas)
-32 % off new 669,- New 990,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Gas Leak Detector - detects natural gas, propane-butane, measurement range to 2500 ppm, mains power supply, reaction time 20 s, acoustic, visual signals, signal volume 85 dB,...
Homematic IP Smoke detector HmIP-SWSD-2 - Smoke Detector
Homematic IP Smoke detector HmIP-SWSD-2
-8 % off new 1,439,- New 1,571,-
Unsealed - in stock 1 pcs
Smoke Detector - battery-powered , detection reach 40 m, acoustic, visual signals, signal volume 85 dB, battery indication, features: test button, cover material plastic, operating...
Shelly Gen4 Flood, flood sensor, Bluetooth - Water Leak Detector
Shelly Gen4 Flood, flood sensor, Bluetooth
-5 % off new 849,- New 899,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Water Leak Detector - detects Humidity and water gas, battery-powered, range: 2 m, sound level: 50dB, compatible with Apple Home, Google Home, Manufacturer app and Home Assistant,...
Airthings View Pollution - air quality monitor - Air Quality Meter
Airthings View Pollution - air quality monitor
-45 % off new 2,649,- New 4,899,-
Unsealed - in stock 2 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Air Quality Meter is designed for indoor environments where it monitors humidity and temperature. You use batteries or a USB cable to power it. Easily connect the air detector to...
BOT Smart gas detector WiFi GS5 - Gas Leak Detector
BOT Smart gas detector WiFi GS5
-6 % off new 739,- New 789,-
Unsealed - in stock 2 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Gas Leak Detector - mains power supply, detection reach 20 m, acoustic signals, notifications via push notifications, signal volume 70 dB, display, features alarm, cover material...
Smoot Air Gas Sensor - Gas Leak Detector
Smoot Air Gas Sensor
-10 % off new 799,- New 890,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Gas Leak Detector - detects natural gas, propane-butane, smoke, mains power supply, notifications via push notifications, battery indication and display, cover material plastic,...
IMMAX NEO Smart Ultrasonic Liquid Level Sensor , 5 m, WiFi - Sensor
IMMAX NEO Smart Ultrasonic Liquid Level Sensor , 5 m, WiFi
-8 % off new 1,029,- New 1,124,-
Unsealed - in stock 2 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Sensor - precise measurement using ultrasonic technology, suitable for any type of liquid, IP65 resistance, possibility of connection to a smart water valve, Immax NEO PRO app in...
IMMAX NEO Smart Ultrasonic Liquid Level Sensor , 5 m, WiFi - Sensor
IMMAX NEO Smart Ultrasonic Liquid Level Sensor , 5 m, WiFi
-10 % off new 1,009,- New 1,124,-
As good as new - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Sensor - precise measurement using ultrasonic technology, suitable for any type of liquid, IP65 resistance, possibility of connection to a smart water valve, Immax NEO PRO app in...
Hütermann Water flood minialarm - water leak detector - flood moisture sensor - Water Leak Detector
Hütermann Water flood minialarm - water leak detector - flood moisture sensor
-8 % off new 319,- New 348,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Water Leak Detector - detects water gas, battery-powered, sound level: 85dB, standalone functional unit
Meross Smart Water Leak Sensor - Sensor
Meross Smart Water Leak Sensor
-5 % off new 379,- New 399,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Sensor - dual detection probe (upper and lower), detection of small droplets and larger leaks, instant acoustic alarm 100 dB, alerts via push notifications to your phone,...
Aptel Wireless motion sensor 9V white - 3 m range - Motion Sesnor
Aptel Wireless motion sensor 9V white - 3 m range
-60 % off new 239,- New 609,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Motion Sesnor , closed system with detection motion,
Honeywell Home Shut-off Valve L5 WiFi 1" and Leak Detector - Humidity Sensor
Honeywell Home Shut-off Valve L5 WiFi 1" and Leak Detector
5,889,-
From 135,- per month
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Humidity Sensor - acoustic signalling, notifications via push notifications, cover material plastic, operating temperature up to 50 °C, input voltage 230 V, sensing cable in the...
EVOLVEO SecuPro, wireless siren with solar power - Siren
EVOLVEO SecuPro, wireless siren with solar power
-5 % off new 849,- New 899,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Siren - closed system, area of use: security, power supply: Battery-Powered, Solar and USB
Homematic IP Rain Sensor - HmIP-SRD - Sensor
Homematic IP Rain Sensor - HmIP-SRD
-59 % off new 1,559,- New 3,890,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Sensor The wireless rain sensor (HmIP-SRD) for outdoor use is part of the Homematic IP smart home system. The sensor with its high weather and weather protection offers a wide...
EVOLVEO Alarmex Pro (ACSALMWTD) wireless flood detector - Water Leak Detector
EVOLVEO Alarmex Pro (ACSALMWTD) wireless flood detector
-10 % off new 439,- New 489,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Water Leak Detector - detects water gas, battery-powered, range: 100 m, compatible with Manufacturer app, connection via radio waves, battery indication, standalone functional unit...
ONDILO ICO Pool V2, smart water monitor, salt disinfection - Sensor
ONDILO ICO Pool V2, smart water monitor, salt disinfection
-10 % off new 11,190,- New 12,499,-
From 257,- per month
As good as new - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Sensor - water quality analysis, minimal maintenance, durable construction
EVOLVEO Alarmex Pro (ACSALMPIR) wireless PIR motion sensor - Motion Sesnor
EVOLVEO Alarmex Pro (ACSALMPIR) wireless PIR motion sensor
-12 % off new 509,- New 579,-
As good as new - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Motion Sesnor , connect through GSM, closed system with detection motion, range: security, power supply: Battery-Powered,
Sonoff PIR3-RF Small 433MHz RF PIR3 Motion Sensor - Sensor
Sonoff PIR3-RF Small 433MHz RF PIR3 Motion Sensor
-31 % off new 239,- New 349,-
Unsealed - in stock 4 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Sensor - movement, a bridge is necessary to function, the angle of view: 100°, two modes, range: 8 m, connection: radio waves, colour: white
MOES Human Presence Sensor + Light Sensor, Zigbee - Motion Sesnor
MOES Human Presence Sensor + Light Sensor, Zigbee
-36 % off new 559,- New 879,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Motion Sesnor , connect through WiFi 2,4 GHz, open system with detection motion compatible with Tuya, Smartlife and MOES, range: security, power supply: USB,
EVOLVEO Alarmex Pro (ACSALMPIRP) wireless PIR motion sensor with immunity to small animal movement - Motion Sesnor
EVOLVEO Alarmex Pro (ACSALMPIRP) wireless PIR motion sensor with immunity to small animal movement
-15 % off new 579,- New 689,-
Unsealed - in stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Motion Sesnor , connect through WiFi 2,4 GHz and GSM, closed system with detection motion compatible with Tuya, range: security, power supply: Battery-Powered,
Nedis ALRMMW20WT - Motion Sesnor
Nedis ALRMMW20WT
-41 % off new 319,- New 549,-
Unsealed - in stock 2 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Motion Sesnor , closed system with detection motion, range: security, power supply: Battery-Powered,
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