Based on this product's specifications, here are some alternatives and similar models
Leak Detection Sensor Milesight WS303-868M — Mini LoRaWAN water leak detector
Summary description:
Mini leak detection sensor Milesight WS303-868M is a compact LoRaWAN device for detecting water leaks and moisture. Designed for remote monitoring, it reports leak events over LoRaWAN networks and fits tight spaces. Suitable for basements, utility rooms, server racks and industrial sites to enable timely alerts and reduce water damage risks.