eufy Security Water and Freeze Sensor with Remote Alerts, IP65 Waterproof, 2-Year Battery Life, HomeBase Required, Compatible with HomeBase 2 and 3, Optional 24/7 Protection Service, App Control

VIVOHOME Natural Gas Leak Detector with 3000mAh Rechargeable Battery and Audible Visual Alarm, 3 Modes Sensitivity, Portable Combustible Gas Leak Tester Sniffer Detector Like Propane for Home RV

$79.99

Kidde KN-COEG-3 Nighthawk Plug-in Carbon Monoxide and Explosive Gas Alarm with Battery Backup (Pack of 2)

$189.99

Oxygen Detector by Forensics | Industrial Wall Mount | Continuous Monitoring | USA NIST Traceable Calibration | Explosion Proof | Sound & Light Alarms | Relay Output | 0-30% O2 |

$739.45

2 Pack MQ-5 LPG Gas City Sensor Module

$9.00

Kidde Radon Detector, Home Kit, Professional Analysis

$73.00

2 Pack MQ-9 Gas Sensor

$8.00

LogiCO2 CO2 Detector MK90, CO2 Monitor and Alarm

$469.99

HYDROGEN Gas Detector, Meter & Analyzer by FORENSICS | USA NIST Calibration & Certificate | Dust & Explosion Proof | USB Recharge | Sound, Light and Vibration Alarms | 0-1000 ppm |

$397.45

YoLink Smart Home Starter Kit: Hub & Water Leak Sensor 4 with 105dB Audio Alarm 3-Pack, SMS/Text, Email & Push Notifications, Freeze Warning, LoRa Up to 1/4 Mile Open-Air Range, w/Alexa, IFTTT

$69.99

GAEYAELE Liquid Timer Control Relay Electronic Liquid Level Controller 10A (GRL8-01,AC/DC24V-240V)

$24.90

Copapa Tanks Horizontal Liquid Float Switch Water Level Sensor NO NC (White)

$8.99

YoLink Water Leak Detector 4 with 105dB Audio Alarm, App Push, Email Alerts and Limited Text, MoveAlert Function, Freeze Warning Water Sensor Alarm w/ Alexa, IFTTT - 1/4 Mile Long Range, Hub Required

$31.99

Water Leak Detector 5-Pack, 100dB Water Sensor Alarm, Leakage Detection Devices for Home Pipe/Drain/Sink/Faucet Drip, Floor Flooding in Basement/Bathroom/Kitchen/Toilet/Laundry Room

$49.99

KKnoon Wireless Ultrasonic Water Level Monitor Tank Liquid Level High/Low Alarm Solar Powered Water Level Sensor Water Level Indicator Gauge IP65 Waterproof

$90.99

4 Pack WiFi Door Sensor: Smart Window Contact Sensor, App Alerts, Programmable with Tuya/Smart Life Devices for Home Security & Smart Home Automation, Compatible with Alexa Google Assistant

$39.99

FloodStop Water Heater Leak Detector Kit with Automatic Water Shut-Off and Visual/Audible Alarms, 3/4" Compression

$195.43

Filotimo Water Leak Detector, Lound Sound Sensor Alarm, Home Water Flooding Monitor Sink Overflow Monitoring Wet Moisture Alert Pipe Leakage Drip Detection Warning for Basement, Laundry, Bathroom

$11.99

DiversiTech WS-1 Wet Switch Flood Detector

$72.00

Pentair 4005702 Connected Salt Level Sensor for Water Softening Systems, White

$99.00

KERUI Wi-Fi Water Leak Sensor Alarm, Smart Water Detector with App Alerts for Kitchens, Basements, Bathrooms - 3 Pack, Battery Included

$29.99

RecPro RV Tank Sensor Monitor Panel M21 | KIB Replacement | Includes Wire Harness Kit | Level Sensor | Fresh Water or Holding Tank Level Sensor (Black)

$67.95

YoLink Water Leak Sensor 2, 1/4 Mile World's Longest Range Smart Home Water Leak Sensor, Water Leak Detector with Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Included

$49.99

Grohe 22601LN0 Sense Water Leak Detector, Starlight Chrome

$79.80

Sump Pump Alarm High Water Septic Tank Alarm High/ Low Water Alarm Ideal for Sump Alarm System with 110dB Loud Alarm and LED Indicator, Indoor/Outdoor

$125.00