Description

Traditional water detection often requires complex wiring back to a central control panel. The TSF400 Water Leak Sensor simplifies this by integrating the detection logic directly into the probe. This “Standalone” design is the perfect solution for localised risks—such as HVAC drip trays or individual server racks—where you need a direct digital signal without the footprint of a DIN-rail module.

The TSF400-0 is a compact water-leak detector designed for early detection of water presence on floors, trays, or inside equipment enclosures. It operates from a wide 4.5–26vDC supply and provides an N-channel open-drain output for direct connection to PLCs, controllers, alarm modules, or building-automation systems.

Detection is based on the conductivity between sensing electrodes; when water bridges the electrodes, the output changes state, enabling fast and reliable alarming with just a few millimeters of water. The detector is fully electronic, with no moving parts, ensuring high reliability and long service life. Electrode arrangement is shown on the diagram below on the rear of the TSF400 water detection sensor.

Features

• Early leak detection
• Wide power supply range
• N-channel open-drain output
• LED status indicator
• Rugged IP65 enclosure
• Maintenance-free design
• Compact and easy to install
• Versatile applications

Applications

• Leak detection in server rooms, UPS rooms and telecom shelters
• HVAC drip trays, cooling/condensation lines
• Under-floor and raised-floor monitoring
• Domestic and commercial flood-alert systems

N-channel open-drain output

The TSF400 is designed for the modern engineer. Its N-channel open-drain output acts like a dry contact, allowing it to interface directly with PLCs, BMS controllers, or Ethernet I/O modules like the TCW series of remote modules, available in our Ethernet Remote Monitoring Devices section. Whether you are monitoring a remote telecom shelter or a high-rise office building, the TSF400 provides a low-power (5mA), high-reliability gateway to early leak warning.

Specifications