Greisinger 482755 Water Detector with External Sensor, Mains-Powered

In a basement prone to flooding or near a washing machine that could leak, the Greisinger 482755 water detector provides immediate warning. It uses an external conductive sensor on a 1.5 meter cable to detect water presence. When moisture is detected, it triggers an acoustic alarm, a visual LED, and a potential-free relay contact for integration with building management systems.

Key specifications

• Detection method: Conductive measurement
• Sensor: External conductive water sensor, IP65
• Sensor cable length: 1.5 m
• Power supply: Mains powered 230 V AC, 50/60 Hz
• Alarm outputs: Acoustic buzzer, visual LED, potential-free relay (changeover, max 250 V AC / 5 A or 30 V DC / 5 A)
• Device protection class: IP40
• Housing material: ABS plastic
• Mounting: Wall mounting
• Operating temperature: 0 to +50 °C
• Response time: < 1 second
• Power consumption: approx. 1.5 VA
• Reset: Manual reset for alarm state
• Status indicators: Power LED, Alarm LED

Why choose it

This detector offers both local and remote alarm options. The relay output allows connection to external alarm systems or automation controllers, while the built-in buzzer and LED provide immediate on-site notification. The external sensor can be placed in hard-to-reach areas, and its IP65 rating ensures durability in damp environments.

Ideal use cases

• Monitoring basements, laundry rooms, and utility closets for leaks
• Integration into building management systems via relay contact
• Early warning for water heaters, sump pumps, or HVAC condensate trays
• Industrial applications where water detection is critical

Good to know

The device is designed for wall mounting and operates on standard mains power. The sensor cable length of 1.5 meters provides flexibility in sensor placement. The manual reset function allows the user to acknowledge and clear alarms after the water event has been resolved.