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Under $20 Water & Flood Detectors

Shop the best prices on 1,431 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 Lihua Trading and more. Buy water & flood detectors online safely with Fruugo, with secure payment and fast shipping to New Zealand.

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1 - 32 of 1,431
Tuya ZigBee Smart Rain Sensor 2-in-1 Rainwater Flood Detector Rainwater Detection for Home Automati
$14.95 Save $14.00 RRP: $28.95
3-in-1 TDS Water Quality Tester High Accuracy Digital Water Testing Kit for Drink Water Water Tester
$17.95 Save $56.05 RRP: $74.00
ZigBee TUYA Smart Water Leak Detector, Flood Sensor, Remote Monitoring Via Tuya Zigbee Gateway, Wate
$14.95
Water Level Alarm Water Leakage Detector Overflow Alarm Full Water Alarm 120 DB Security Alarm System
$16.95 Save $8.00 RRP: $24.95
3-in-1 TDS Water Quality Tester High Accuracy Digital Water Testing Kit for Drink Water Water Tester
$6.95 Save $13.00 RRP: $19.95
Water Leakage Detection Alarm Rechargeable Ergro Water Pipes Fire Pipeline Automotive Detecti
$2.95 Save $3.00 RRP: $5.95
3-in-1 Tds Water Quality Tester High Accuracy Digital Water Testing Kit For Drink Water Water Tester Integrated
$16.95 Save $16.00 RRP: $32.95
Water Leakage Detector Sensor Water Level Sensor Probe 3 Meter Cable
$10.95
Automatic Operation Water Leak Detector Water Alarm Sensor, Water Leakage Alarm
$5.95 Save $20.00 RRP: $25.95
Accurate Pool & Spa Water Quality Tester, Quick & Easy Chlorine, Bromine, pH, Hardness, Alkalinity, Cyanuric Acid Strips, 50 PCS for Swimming Pool &
$16.95 Save $8.00 RRP: $24.95
3-in-1 Tds Water Quality Tester High Accuracy Digital Water Testing Kit For Drink Water Water Teste
$17.95 Save $18.00 RRP: $35.95
2X 2 m thermistor temperature sensor waterproof probe wire 10 K 1% 3950 black
$10.95 Save $6.00 RRP: $16.95
Tuya Smart Wifi Water Flood Sensor Water Leakage Detector Send Alert When Leak Is Detected Work Wit
$7.95 Save $8.00 RRP: $15.95
Full Automatic Water Level Controller PCB Low Consumption Liquid Level Detection Sensor Module
$12.95 Save $15.00 RRP: $27.95
Water Leak Alarm Detector 120dB Loud Sensor for Home Sink Fish Tank Pump Overflow Leakage Alert System
$16.95 Save $8.00 RRP: $24.95
ZigBee Flood Sensor Water Leakage Detector Water Tank Full Alert Overflow Security Alarm System App
$18.95 Save $60.05 RRP: $79.00
Water Leakage Spot Alarm Detector for Home Security and Flood Alert
$21.95 Save $52.05 RRP: $74.00
Tuya Smart Life WiFi Switch Relay Temperature Humidity Monitoring Thermostat Sensor Passive Dry Cont
$19.95 Save $19.00 RRP: $38.95
2 m thermistor temperature sensor waterproof probe wire 10 K 1% 3950 black
$10.95
Full Automatic Water Level Controller PCB Low Consumption Liquid Level Detection Sensor Module DC5V
$20.95 Save $38.05 RRP: $59.00
Precise HCSR04 Ultrasonic Sensors Module Ideal for Obstacle Avoidance and Level Detection in Intelligent Home Systems
$18.95
433MHz Wired Overflow Leakage Sensor Water Level Leak Detector Home Security Alarm
$18.95 Save $12.00 RRP: $30.95
Tuya Z2M Water Immersion Sensor Zigbee3.0 Flood Water Leak Detector Alarm Security Water Leak Sensor
$18.95 Save $9.00 RRP: $27.95
Wired Type Leakage Alarm Detector Water Sensor with 3.5mm Jack unbrand
$17.95
Zigbee Water Leak Detector for EWelink Zigbee Water Detector APP Remote Control Water Sensor for Kitchens Basements unbrand
$16.95
Water Electrolyzer - Portable Water Quality Tester Lightweight Water Impurity Monitor Easy to Use Electrolyzer Test Monitor-Good
$11.95 Save $24.00 RRP: $35.95
Water Leakage Alarm Detector with Wired Sensor 1 Meter Cable Water Level Sensor Probe Dual Metal Pol
$8.95 Save $4.00 RRP: $12.95
ZigBee TUYA Smart Water Leak Detector, Flood Sensor, Remote Monitoring Via Tuya Zigbee Gateway, Wate
$19.95 Save $34.05 RRP: $54.00
Tuya Smart Water Level Alarm Wifi Water Immersion Sensor Alarm Water Leak Detector App Remote Monitoring
$11.95 Save $67.05 RRP: $79.00
Tuya WIFI Water Sensor Alarm Water Leak Detector Flood Alert Overflow Security Alarm System Works
$19.95 Save $4.00 RRP: $23.95
Wired Photoelectric Vibration Alarm Sensor Detector Home Security Alarm System
$20.95 Save $24.00 RRP: $44.95
Water Liquid Level Controller Sensor Module Water Level Detection Sensor Pumping Drainage Protection
$11.95 Save $5.00 RRP: $16.95