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Under $20 Water & Flood Detectors

Shop the best prices on 2,853 great value under $20 water & flood detectors. Shopping for water & flood detectors is easy with Fruugo, with SALE discounts, offers and savings on Shanghai Yangxin, Asiv, Guangzhou Aidai Trading Co., Ltd and more. Buy water & flood detectors online safely with Fruugo, with secure payment and fast shipping to Australia.

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1 - 32 of 2,853
Water Electrolyzer - Portable Water Quality Tester Lightweight Water Impurity Monitor Easy to Use Electrolyzer Test Monitor
$16.95 Save $9.00 RRP: $25.95
Temperature Sensor Induction Cooker Temperature Detector Electric Cooker Temperature Sensor
$8.95 Save $50.05 RRP: $59.00
2025 Smartlife App Wifi Water Sensor Water Leak Detector Alarm Home Control Ip67 Works With Tuyasmart /
$15.95 Save $15.00 RRP: $30.95
High Sensitive Leak Detector Loud Water Leak Alarm without Battery for Basement Apartment Kitchen Bathroom (White)
$17.95 Save $56.05 RRP: $74.00
Wireless Water Alarm Independent Battery Powered Water Alarm Sensor Detector 85dB Sounder Water
$4.95 Save $24.00 RRP: $28.95
Wifi Gas Leak Detector And Fire Alarm Lcd Display Wall Mounted App Control Smart Wi-fi Natural Gas/ Lpg Tester Methane Alarm Buzzler With Sound Ligh unbrand
$16.95 Save $9.00 RRP: $25.95
High Decibel Sound Light Alarm 220V Adjustable Security Warning Device, Impact Resistant Siren for Home Shop Warehouse Safety
$12.95
Wired Type Leakage Alarm Detector Water Sensor with 3.5mm Jack
$12.95 Save $5.00 RRP: $17.95
Tuya Wifi Smart Water Sensor Leak Detector Flood Water Leakage Alarm Security System For Alexa Home
$6.95
Water Electrolyzer - Portable Water Quality Tester Lightweight Water Impurity Monitor Easy to Use Electrolyzer Test Monitor-Good
$9.95 Save $19.00 RRP: $28.95
Zigbee Smart Vibration Sensor Detection Tuya Smart Life APP Notification Real-Time Motion Vibration Alarm Smart Home
$17.95 Save $5.00 RRP: $22.95
ZigBee TUYA Smart Water Leak Detector, Flood Sensor, Remote Monitoring Via Tuya Zigbee Gateway, Water Tank Full Alarm
$16.95
12V Gas Alarm Sensor Alarm Propane Butane LPG Natural Motor Home Camper
$16.95 Save $82.05 RRP: $99.00
Universal Smart Electric Infrared Remote Control for Home Automation, Wireless Smart Sensor Compatible with Multiple Devices
$15.95
Water Temperature Sensor Induction Plug Accessories for -
$10.95
Reliable Sound Light Alarm System ABS Emergency Alert System Easy to Use for Effective Emergency Notifications Yellow
$18.95
Tuya Smart Water Level Alarm Wifi Water Immersion Sensor Alarm Water Leak Detector App Remote Monitoring
$13.95 Save $13.00 RRP: $26.95
Smart Knob Switch Tuya ZigBee Wireless Button for Home Automation, Scene Creation Via Smart Life App
$19.95 Save $9.00 RRP: $28.95
TDS Water Quality Tester Digital Drinking Water Test Pen PH Testing Tool for Swimming Pool Water
$20.95 Save $43.05 RRP: $64.00
Fully Automatic Water Level Controller Switch 25A 220V Water Tank Liquid Level Detection Sensor Wat
$19.95
Wired Mini Siren for Home Security Alarm System Horn Siren 120dB 12V
$17.95 Save $3.00 RRP: $20.95
Tuya Zigbee Water Level Sensor Smart Water Leakage Alarm Detector Overflow Security Protection SmartThings Tuya EWeLink
$17.95
Water Mains Leak Detector Underground Mains Leak Monitor Water Mains Leak Detector With Headphones
$19.95 Save $4.00 RRP: $23.95
3-in-1 TDS Water Quality Tester High Accuracy Digital Water Testing Kit for Drink Water Water Tester FY
$0.95
Water Mains Leak Detector Underground Mains Leak Monitor Water Mains Leak Detector With Headphones
$1.95 Save $1.00 RRP: $2.95
Household Anti-Leak Alarm, Water Immersion Detector, Washing Machine Drainage Overflow Water Level Alarm
$13.95 Save $4.00 RRP: $17.95
Water Leakage Detection Alarm Rechargeable Underground Water Pipes Fire Pipeline Automotive Detecti
$17.95 Save $17.00 RRP: $34.95
12V Gas Alarm Sensor Alarm Propane Butane LPG Natural Motor Home Camper
$16.95 Save $82.05 RRP: $99.00
Portable Water Electrolysis Water Quality Tester Tool
$16.95 Save $82.05 RRP: $99.00
Wired Water Leakage Alarm Detector with 3.5mm Jack Sensor
$17.95 Save $27.00 RRP: $44.95
Wifi Ds18b20 Temperature Sensor Real-time Monitor Tuya Smart Rf433 Intelligent Thermostat Temperature Switch Voice Control 16a
$17.95
3-in-1 Tds Water Quality Tester High Accuracy Digital Water Testing Kit For Drink Water Water Teste
$13.95 Save $6.00 RRP: $19.95