A water leak detector is a device designed to identify the presence of water in areas where it shouldn't be, such as basements, kitchens, or bathrooms. These detectors typically use sensors to monitor moisture levels and can alert homeowners through alarms or notifications when a leak is detected. This early warning can help prevent significant water damage and costly repairs. Many water leak detectors are equipped with features like Wi-Fi connectivity, allowing users to receive alerts on their smartphones. Some models also include automatic shut-off valves that can stop the water supply when a leak is detected, providing an added layer of protection for homes and businesses.