The Qolsys QS5536-840 Wireless S-Line Flood Water Sensor detects the presence of water and sends immediate alerts to help prevent costly water damage before it starts. Ideal for high-risk areas like beneath water heaters, sinks, and washing machines, this encrypted sensor delivers reliable performance and secure communication with your IQ Panel.

• Keyless flood detection using encrypted S-Line technology for enhanced security

• 6-foot cable with water “bug” sensor for flexible placement on floors or walls

• Sends real-time alerts via email or text when water is detected

• Supports legacy 319.5 MHz systems and features a 600-foot wireless range

• Battery-powered with replaceable dual CR2032 lithium batteries lasting up to 5 years