Greisinger 482758 Water Detector with External Sensor, Mains-Powered

Detects conductive liquids in under 2 seconds with an external sensor and 1.5 m cable, triggering an 85 dB audible alarm, red LED, and potential-free relay output.

Overview

The Greisinger 482758 is a mains-powered water detector with an external sensor for monitoring leaks and spills. It uses conductive measurement to detect liquids such as water or heating oil. The main unit mounts on a wall and connects to the sensor via a 1.5 m cable. When liquid is detected, the device activates an acoustic alarm (approx. 85 dB at 10 cm), a red LED, and a relay output. The relay is a potential-free changeover contact rated for up to 250 V AC / 5 A or 30 V DC / 5 A resistive load. The alarm resets automatically once the sensor dries. The housing is made of ABS plastic and has an IP20 protection class for indoor use.

What stands out

• Fast response: detects liquid in less than 2 seconds
• Loud acoustic alarm: approximately 85 dB at 10 cm
• Potential-free relay output for integration with building management systems
• External sensor with 1.5 m cable for flexible placement
• Automatic alarm reset after sensor dries

Technical details

• Detection principle: conductive measurement
• Sensor type: external water sensor
• Power supply: 230 V AC, 50/60 Hz
• Power consumption: approx. 1.5 VA
• Alarm type: acoustic, visual, relay output
• Acoustic alarm volume: approx. 85 dB (at 10 cm)
• Visual alarm indicator: red LED
• Relay output type: potential-free changeover contact (NO/NC)
• Relay switching capacity (AC): max. 250 V AC, 5 A (resistive load)
• Relay switching capacity (DC): max. 30 V DC, 5 A (resistive load)
• Sensor cable length: 1.5 m
• Operating temperature range: 0 to +50 °C
• Storage temperature range: -20 to +70 °C
• Housing material: ABS plastic
• Protection class (main unit): IP20
• Mounting type: wall mounting
• Liquid detection: conductive liquids (e.g., water, heating oil)

Our verdict

A reliable and fast water detector with a flexible external sensor and relay output, ideal for monitoring leaks in technical rooms or basements.