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Water leak detector on a kitchen floor

Smart Alarms & Sensors

Explore smart alarms & sensors at SpyShop. Smart alarms and motion sensors designed to enhance security, awareness, and everyday safety at home or work. Choose security equipment by identifying the area, access point or property you want to protect and the system already in place.

Smart alarms & sensors: what to compare

Compare the installation requirements and supported connections for the selected product. Check whether it is a standalone device, part of a larger system or an accessory that needs compatible equipment. Power, mounting space and access for maintenance can affect your choice. Review the listed controls and alert methods, and confirm whether an app, hub or subscription is needed. A category name does not mean that every device includes the same functions, so use the specifications of the individual item.

  • Sensor purpose
  • Hub and app compatibility
  • Power and alert method

Before you order

Use security equipment on property you own or are authorised to manage, and respect the privacy of others when recording or monitoring. Confirm the exact product option, dimensions and supplied accessories in the listing before adding it to your basket.

Water leak detector on a kitchen floor

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125 products

Save 45%US1010 Ultrasonic Oxygen Sensor High Precision Ultrasonic Oxygen Concentration Ultrasonic Oxygen Sensor
US1010 Ultrasonic Oxygen Sensor Module with UART Output Sale price€33,56 Regular price€60,81
Save 41%SINVT Dual-Axis Tilt Sensor with TTL or RS232 Output
SINVT Dual-Axis Tilt Sensor with TTL or RS232 Output Sale priceFrom €116,86 Regular price€197,87
Save 45%PIR Light Sensor Switch, Adjustable, AC 100–240V or DC 12V
PIR Light Sensor Switch, Adjustable, AC 100–240V or DC 12V Sale priceFrom €32,16 Regular price€58,81
Save 43%Magnetic Smoke Alarm Mounting Plates 70 mm, 1-10 Pack
Magnetic Smoke Alarm Mounting Plates 70 mm, 1-10 Pack Sale priceFrom €20,96 Regular price€36,82
Save 46%Soil Moisture Sensor Module for Arduino, 5 or 10 Sets
Soil Moisture Sensor Module for Arduino, 5 or 10 Sets Sale priceFrom €16,76 Regular price€31,07
Save 39%100m Invisible Infrared Beam Sensor Waterproof Outdoor IR Alarm
Infrared Beam Sensor 100m Outdoor Perimeter Alarm Sale price€65,76 Regular price€107,31
Save 40%Adjustable PIR Motion Sensor Detector Module with Bracket
PIR Motion Sensor Module Adjustable Delay with Bracket Sale priceFrom €54,56 Regular price€91,38
Save 42%Docreate Mini Leak Detector Sound Amplifier For Home/13000X Audio Magnification/High Sensitivity Sensor/Rechargeable 200mAh - Spy-shop.com
Mini Leak Detector Sound Amplifier LA103 for Pipe Leaks Sale price€23,06 Regular price€39,61
Save 40%Gas Detector and Carbon Monoxide Alarm for Home Safety-CO and Gas Detector
Gas Detector and Carbon Monoxide Alarm with Voice Alert Sale priceFrom €51,06 Regular price€85,56
Save 41%Bluetooth Inclinometer Digital Compass, BWT901CL AHRS Accelerometer+Gyro+Angle+Magnetometer(XYZ,200HZ,MPU9250)for PC/Android/MCU
BWT901CL Bluetooth Motion Sensor with Angle and Acceleration Sale priceFrom €115,46 Regular price€195,45
Save 45%RV Propane Gas Detector 85dB Alarm DC 12V Compact Design-White
RV Propane Gas Detector, 85dB Alarm, 12V, Digital Display Sale price€80,46 Regular price€145,67
Save 46%Tuya Rain Sensor - Wi-Fi or Zigbee
Tuya Rain Sensor, Wi-Fi or Zigbee, Black or White Sale priceFrom €30,76 Regular price€57,44
Save 41%Rechargeable Pipe Leak Listening Detector
Rechargeable Pipe Leak Listening Detector with Headphones Sale price€27,96 Regular price€47,06
Save 41%R60ABD1 60G Millimeter Wave Radar Sensor Respiratory Sleep Monitoring Breathing and Heartbeat Wave Biosensing Radar Module
R60ABD1 60 GHz Breathing and Sleep Radar Module Sale price€46,86 Regular price€79,56
Save 40%Digital Fibre-Optic Sensor Amplifier Options
Fibre-Optic Sensor Amplifier BS-N22 or BS-P22, NPN or PNP Sale priceFrom €51,06 Regular price€85,80
Save 44%SCT013 Split-Core AC Current Sensor - Output Options
SCT013 Split-Core AC Current Sensor, Range and Output Sale priceFrom €19,56 Regular price€35,16
Save 45%Tuya Zigbee Water-Leak Sensor
Tuya Zigbee Water Leak Sensor with App Alerts Sale price€34,26 Regular price€62,45
Save 40%Tuya Zigbee Rain Sensor
Tuya Zigbee Rain Sensor SJ100, Smart Life Alerts Sale price€56,66 Regular price€93,82
Save 43%HLK-LD2450 Motion-Tracking Radar Module Options
HLK-LD2450 24GHz Radar Module for Motion Tracking Sale priceFrom €20,26 Regular price€35,84
Save 40%WiFi Water Leak Alarm with Tuya App Alerts
WiFi Water Leak Alarm WF-WWT01 with Tuya App Alerts Sale price€30,06 Regular price€49,72
Save 44%Solar Irradiance Sensor with Output Options
Solar Irradiance Sensor, SDI-12 RS485 4-20 mA 0-2 V Sale priceFrom €126,66 Regular price€225,30
Save 38%Zigbee Rain Sensor for eWeLink Setups
Zigbee Rain Sensor for eWeLink with Battery Power Sale price€69,26 Regular price€111,64
Save 44%Digital Colour-Mark Sensor with Output Options
Digital Colour-Mark Sensor PM-LX101 with NPN or PNP Output Sale priceFrom €89,56 Regular price€159,42
Save 40%Solar-Powered Zigbee Rain Sensor for Tuya
Solar Zigbee Rain Sensor for Tuya Smart Home Sale price€57,36 Regular price€95,44
Save 39%Solar and USB Motion Alarm with Flashing Light
Solar Motion Alarm with Flashing Light and Remote, CT90R Sale price€61,56 Regular price€101,42
Save 42%Zigbee Smart Motion Sensor - Multiple Versions
Zigbee Motion Sensor with Tuya or Zigbee2MQTT Options Sale priceFrom €25,16 Regular price€43,16
Save 40%LD2451 LD2415H 24GHz MMWave Radar Module Vehicle Speed Distance Detection TTL RS485 Multi Target 100m 180m Long Range
24GHz Vehicle Radar Module, LD2451 or LD2415H Sale priceFrom €25,86 Regular price€43,32
Save 45%HW19 Motion Alarm and Doorbell with Remote
HW19 Motion Alarm Doorbell with Remote Control Sale priceFrom €34,26 Regular price€62,20
Save 46%Force-Sensitive Resistor Sensor Options
Force-Sensitive Resistor, FS400 FSR402 or FSR406 Sale priceFrom €16,76 Regular price€30,99
Save 44%ME3-NH3 Electrochemical Ammonia Sensor
ME3-NH3 Electrochemical Ammonia Sensor Component Sale price€123,16 Regular price€219,64
Save 44%Four-Direction Tilt Sensor Module 3-5V with Digital Output
Four-Direction Tilt Sensor Module 3-5V with Digital Output Sale price€20,26 Regular price€36,07
Save 40%PMS7003 G7 Laser Particle Sensor Module for Projects
PMS7003 G7 Laser Particle Sensor Module for Projects Sale price€31,46 Regular price€52,12
Save 38%HASS Series Magnetic Current Transducer, 50-S to 600-S
HASS Series Magnetic Current Transducer, 50-S to 600-S Sale priceFrom €74,16 Regular price€118,87
Save 44%Zigbee Temperature and Humidity Sensor SNZB-02P
Zigbee Temperature and Humidity Sensor SNZB-02P Sale priceFrom €34,26 Regular price€61,46
Save 43%Tuya Zigbee Smoke Detector, 3V, 1 or 3 Pack
Tuya Zigbee Smoke Detector, 3V, 1 or 3 Pack Sale priceFrom €41,96 Regular price€73,16
Save 42%Tuya Wi-Fi Door & Window Sensors – 1, 2, 4 or 8 Sets
Tuya Wi-Fi Door and Window Sensors 1, 2, 4 or 8 Sets Sale priceFrom €23,06 Regular price€39,47
Save 41%D02 Tuya Wi-Fi Door & Window Contact Sensor
Tuya Wi-Fi Door and Window Contact Sensor D02 Sale price€25,16 Regular price€42,48
Save 41%898D Standalone Water Leak Alarm, 1, 2 or 3 Pack
898D Standalone Water Leak Alarm 1, 2 or 3 Pack Sale priceFrom €23,06 Regular price€39,36
Save 40%Water Contact Sensor with Wired Probe, Wi-Fi or Zigbee
Water Contact Sensor with Wired Probe, Wi-Fi or Zigbee Sale priceFrom €28,66 Regular price€47,53
Save 44%Wi-Fi Smoke Alarm 228WT for Tuya Smart and Smart Life
Wi-Fi Smoke Alarm 228WT for Tuya Smart and Smart Life Sale price€37,76 Regular price€66,91
Save 44%Tuya Wi-Fi Water Leak Alarm with Probe, 1–3 Sensor Options
Wi-Fi Leak Alarm with Probe, Tuya App Alerts, 1–3 Sensors Sale priceFrom €38,46 Regular price€68,40
Save 44%Round Zigbee water leak sensor on white background
Zigbee 3.0 Water Leak Sensor for Tuya and Smart Life Sale price€36,36 Regular price€64,74
Save 43%White smoke alarm with test and mute button on white background
Standalone Smoke Alarm, 1 to 5 Unit Packs Sale priceFrom €22,36 Regular price€39,10
Save 39%Zigbee Microwave Motion Sensor for Tuya or Zigbee2MQTT
Zigbee Microwave Motion Sensor for Tuya or Zigbee2MQTT Sale priceFrom €28,66 Regular price€47,33
Save 39%Wi-Fi PIR Motion Sensor with Lux for Smart Lighting
Wi-Fi PIR Motion Sensor with Lux for Smart Lighting Sale priceFrom €29,36 Regular price€48,20
Save 42%White water leak sensor with cable and two-pin probe on white background
Tuya Zigbee 3.0 Leak Sensor with Remote Probe Sale price€25,16 Regular price€43,07
Save 42%IH-K665 Tuya Zigbee Water Leak Sensor 1-8 Pack
IH-K665 Tuya Zigbee Water Leak Sensor 1-8 Pack Sale priceFrom €22,36 Regular price€38,41
Save 43%Wired Smoke Detector with Sound and Light Alarm, 40 m²
Wired Smoke Detector with Sound and Light Alarm, 40 m² Sale price€39,86 Regular price€69,86

Our Smart Alarms & Motion Sensors collection includes reliable devices for monitoring movement and detecting potential security threats in real time. From motion sensors to smart alarm solutions, these products are selected to help improve safety, awareness, and peace of mind in different environments.

Focused on ease of installation, reliable detection, and everyday usability, this collection is suitable for homes, offices, and other indoor spaces. Whether you want to enhance security, monitor activity, or add an extra layer of protection, these smart solutions support a safer and more controlled environment.