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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.

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All from 345
Elektrobock CN-L01 - Motion Sesnor
Elektrobock CN-L01
12.90 €
In stock 3 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Motion Sesnor , closed system with detection motion, range: lighting and electrical installation, power supply: Power plug,
Added to cart
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EVOLVEO wireless water level detector for Alarmex/Sonix - Water Leak Detector
EVOLVEO wireless water level detector for Alarmex/Sonix
12.90 €
Currently Unavailable
Water Leak Detector - detects Water gas, battery-powered, central unit required to function
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iGET SECURITY EP9 - wireless water sensor for iGET M5-4G alarm - Detector
iGET SECURITY EP9 - wireless water sensor for iGET M5-4G alarm
20.90 €
In stock > 5 pcs at the supplier's
Detector water detection sensor for iGET SECURITY M5 alarm. It is used for water detection in bathrooms, technical rooms, tanks, etc., wherever there is a risk of water flooding....
Added to cart
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Shelly Gas, CNG Gas Detector, Alarm: Flashing LED & Acoustic Signal, WiFi - Detector
Shelly Gas, CNG Gas Detector, Alarm: Flashing LED & Acoustic Signal, WiFi
63.90 €
In stock > 5 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Detector - Shelly GAS is a compact and highly sensitive CNG natural gas detector, bringing additional security for your home and family. Alarm: flashing LED & acoustic signal....
Added to cart
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GARNI 210T OneCare - Air Quality Meter
GARNI 210T OneCare
101.90 €
In stock > 5 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 +...
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Alecto COA3910 - Gas Leak Detector
Alecto COA3910
20.95 €
In stock > 5 pcs at the supplier's
Gas Leak Detector - detects CO (carbon monoxide), battery-powered, acoustic signals, signal volume 85 dB, battery indication, features alarm, cover material plastic, input voltage...
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IMMAX NEO Smart 3in1 PIR, occupancy and light sensor, Zigbee 3.0 - Sensor
IMMAX NEO Smart 3in1 PIR, occupancy and light sensor, Zigbee 3.0
29.38 €
In stock > 5 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Add AlzaPlus+ and save instantly 19.10 €
Sensor - 3in1 PIR sensor, presence and lighting, Zigbee 3.0 (Tuya) is a smart device, which combines motion detection (PIR), monitoring the presence of people and measuring light...
Added to cart
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Flammable and Explosive Gas Detector SAFE 808L (Natural Gas) - Gas Leak Detector
Flammable and Explosive Gas Detector SAFE 808L (Natural Gas)
Discounted -7 % 34.90 € 37.90 €
Currently Unavailable
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,...
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SAFEHOME Test spray for SAFE400 detectors - Accessory Kit
SAFEHOME Test spray for SAFE400 detectors
16.37 €
Currently Unavailable
Accessory Kit - Spray, Operational test of the sensor and equipment, tests all CO detectors according to BS / CSN / EN 50291 and UL 2034 and all tobacco smoke detectors,...
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Honeywell Home R200H-N2 Interconnected fire alarm detector - temperature principle, battery operated - Temperature Sensor
Honeywell Home R200H-N2 Interconnected fire alarm detector - temperature principle, battery operated
33.90 €
In stock > 5 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Temperature Sensor - interconnected fire detector, battery powered
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EZVIZ Smoke detector T4C - Smoke Detector
EZVIZ Smoke detector T4C
Great price 37.90 €
In stock > 5 pcs at the supplier's
Add AlzaPlus+ and save instantly 30.32 €
Smoke Detector - battery-powered , acoustic, visual signals, notifications via push notifications, signal volume 85 dB, battery indication, features: test button and temporary...
Added to cart
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iGET SECURITY P9 - wireless water level detector for iGET SECURITY M3B and M2B - Water Leak Detector
iGET SECURITY P9 - wireless water level detector for iGET SECURITY M3B and M2B
8.09 €
In stock 1 pcs at the supplier's
Water Leak Detector - detects Water gas, battery-powered, range: 80 m, connect via GSM, battery indication, central unit required to function
Added to cart
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Shelly Gen4 Flood, flood sensor, Bluetooth - Water Leak Detector
Shelly Gen4 Flood, flood sensor, Bluetooth
37.90 €
In stock > 5 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,...
Added to cart
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QINGPING CO2 & Temperature & RH Monitor - Air Quality Meter
QINGPING CO2 & Temperature & RH Monitor
83.90 €
In stock > 5 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Add AlzaPlus+ and save instantly 67.12 €
Air Quality Meter - detects gas, temperature, humidity, measurement range from 400 to 9999 ppm, temperature measurement from -20 to 50 °C with accuracy 0.5 °C, humidity measurement...
Added to cart
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Homematic IP Smoke detector HmIP-SWSD-2 - Smoke Detector
Homematic IP Smoke detector HmIP-SWSD-2
65.90 €
In stock > 5 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Smoke Detector - battery-powered , detection reach 40 m, acoustic, visual signals, signal volume 85 dB, battery indication, features: test button, cover material plastic, operating...
Added to cart
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MOES Human Presence Sensor + Light Sensor, Zigbee - Motion Sesnor
MOES Human Presence Sensor + Light Sensor, Zigbee
24.90 €
In stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Motion Sesnor , open system with detection motion, range: security, power supply: USB,
Added to cart
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Elektrobock CN05C - Motion Sesnor
Elektrobock CN05C
Great price 10.90 €
In stock 1 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Motion Sesnor with detection motion, range: lighting, power supply: Power plug,
Added to cart
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EVOLVEO SecuPro wireless PIR motion sensor - Motion Sesnor
EVOLVEO SecuPro wireless PIR motion sensor
20.97 €
In stock > 10 pcs at the supplier's
Motion Sesnor , connect through WiFi 2,4 GHz and WiFi 5 GHz with detection motion compatible with Tuya, range: security, application in English, Czech and Slovak, power supply:...
Added to cart
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Kidde Fire and Smoke Detector 10Y29 - Smoke Detector
Kidde Fire and Smoke Detector 10Y29
Discounted -16 % 20.90 € 24.90 €
In stock > 10 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Smoke Detector - signal volume 85 dB, standalone unit
Added to cart
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GARNI 204 OneCare - Air Quality Meter
GARNI 204 OneCare
116.90 €
In stock > 5 pcs
Order by midnight, get it at the AlzaBox in the morning.
Info
Air Quality Meter - detects temperature, humidity, dust particles, temperature measurement from -40 to 70 °C, humidity measurement from 1 to 99 %, mains + battery-powered,...
Added to cart
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Airthings View Pollution - air quality monitor - Air Quality Meter
Airthings View Pollution - air quality monitor
203.90 €
From 4.84 € per month
On the way > 5 pcs
Expected 15/09/2026
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...
Added to cart
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Homematic IP PIR motion detector with brightness sensor - outdoor - HmIP-SMO-2 - Motion Sesnor
Homematic IP PIR motion detector with brightness sensor - outdoor - HmIP-SMO-2
87.81 €
Currently Unavailable
Motion Sesnor , connect through WiFi 2,4 GHz, closed system with detection motion, range: lighting, heating and cooling and security, application in Czech, power supply:...
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Homematic IP Siren indoor - HmIP-ASIR-2 - Siren
Homematic IP Siren indoor - HmIP-ASIR-2
66 €
Currently Unavailable
Siren - open system, area of use: security, OS supported: Android and iOS, compatible with Google Home and Homematic IP, power supply: Battery-Powered
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Ajax MotionProtect Curtain Black - Motion Sesnor
Ajax MotionProtect Curtain Black
110.23 €
Currently Unavailable
Motion Sesnor , connect through Radio frequency, closed system with detection motion compatible with Ajax, range: security, application in English, Czech, German and Slovak, power...
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