Honeywell
Resideo RWD42 Water Defense Water Leak Alarm with Sensing Cable (Non-WiFi)
Tuehakny
2 Pcs Water Leak Detector with Dual Probe, 16.4ft Per Probe Cord, Max 120 dB Adjustable Audible & Visual Water Sensor,Water Alarm for Water Tank/Aquarium/Swimming Pool/Basement/Underground/Flume/Flood
Eve
Eve Water Guard - Smart Home Water Leak Detector, 2m Sensing Cable (extendable), 100dB Siren, Water-Leak Alert on iPhone, iPad, Apple Watch (Apple HomeKit)
EG Air
Natural Gas Detector, Propane Gas Leak Detector, Gas Sniffer, Portable Combustible Explosive Gas Sensor, Tester: Methane, Butane, LPG, LNG; Sound & LED Warning, Flexible Sensor Neck; eBook