These seem interesting. WiFi connected flood sensors.
www.orbitonline.com
B-hyve Smart Flood Sensor | Wi-Fi Water Leak & Freeze Detector
B-hyve Smart Leak & Freeze Detectors are industry-leading Wi-Fi-enabled sensors that alert you of even the smallest water leak and pipe freeze potential. Protect your home and shop now at Orbitonline.com.
www.orbitonline.com