Finder 72.11.9.024.0000 Level Control Relay, 24V AC/DC, Fixed 150 kΩ Sensitivity, 1 CO 10A, DIN Rail

In industrial tanks, water treatment plants, or building services, the Finder 72.11.9.024.0000 level control relay monitors conductive liquid levels using up to three electrodes. It energizes or de-energizes its output contact when the liquid reaches the set threshold, with fixed 150 kΩ sensitivity and selectable fill or empty function.

Key specifications

• Supply voltage: 24V AC/DC
• Function: Single function (fill/empty selectable)
• Sensitivity: Fixed 150 kΩ
• Output contact: 1 CO (SPDT), 10A @ 250V AC / 10A @ 30V DC
• Number of electrodes: 3 (common, min, max)
• Mounting: 35mm DIN rail
• Operating temperature: -20 to +50 °C
• Power consumption: 2 VA (AC) / 1.5 W (DC)
• Max. electrode cable length: 1000 m (with 1.5 mm² cable)
• Dielectric strength: 2 kV AC (supply-contacts), 1 kV AC (contacts)

Why choose it

This relay provides reliable level control with fixed sensitivity, eliminating the need for adjustment. Its SPDT contact can switch pumps or valves directly, and the selectable fill/empty function adapts to different applications.

Ideal use cases

• Pump control in wells, sumps, and wastewater systems
• Level monitoring in cooling towers and boilers
• Overfill or dry-run protection for tanks

Good to know

The relay is designed for 35mm DIN rail mounting and operates with three electrodes for minimum and maximum level detection. It is suitable for conductive liquids with a maximum cable length of 1000 m.