Finder Level Control Relay for Conductive Liquids, 24V AC/DC, 1 CO, 72.01 Series 720180240002

Managing liquid levels in tanks or reservoirs often requires a reliable and automatic solution to prevent overflow or dry-running. The Finder 72.01 level control relay monitors conductive liquids using up to three electrodes, automatically controlling fill or empty operations. This unit operates on 24V AC/DC and provides one changeover relay output rated up to 10A at 250V AC, making it suitable for pumps, valves, and alarms in industrial and building automation systems.

Who is it for

This level control relay is intended for electricians, panel builders, and maintenance technicians who need a compact, DIN-rail mountable device for liquid level management in water treatment, HVAC, irrigation, and process control applications.

Main features

• Selectable fill or empty control function for versatile liquid management.
• Adjustable sensitivity from 5 to 150 kΩ to accommodate different liquid conductivities.
• Supports up to three electrodes (minimum, maximum, common) for precise level detection.
• LED indicators for supply and output status for quick diagnostics.
• 35 mm DIN rail mounting for easy integration into control panels.

Specifications

• Supply voltage: 24 V AC/DC
• Output: 1 CO (SPDT) relay, AgNi contact
• Rated current: 10 A at 250 V AC (AC1)
• Sensitivity range: 5 to 150 kΩ
• Number of electrodes: 3
• Power consumption: 3 VA (AC) / 1.5 W (DC)
• Operating temperature: -10 to +50 °C
• Protection degree: IP40 front, IP20 terminals
• Dielectric strength: 2 kV AC between input and output
• Dimensions: DIN rail module, width 17.5 mm (1 module)

Tips

For reliable operation, ensure the electrodes are spaced appropriately and the liquid conductivity is within the adjustable range. Use shielded cables for electrode connections to minimize interference. The relay can be used with conductive liquids only; do not use with flammable or non-conductive fluids.