Finder Level Control Relay 72 Series, 2 CO, 240V AC, Conductive Liquids 725102400000PQA

In water treatment plants, pumping stations, and industrial process control, maintaining the correct liquid level in tanks is critical. The Finder 72 Series level control relay monitors conductive liquids and switches its output contacts based on the liquid level detected by electrodes. This unit operates on 240V AC and provides two changeover contacts for controlling pumps, valves, or alarms.

Key specifications

• Supply voltage: 240V AC (50/60 Hz)
• Two changeover contacts (AgNi), rated 8 A at 250V AC
• Sensitivity adjustable from 5 to 150 kΩ
• Selectable filling or emptying function
• Mounts on 35 mm DIN rail
• LED indicator for relay status
• Electrode voltage: 5 V AC
• Maximum cable length to sensor: 100 m
• Power consumption: 3 VA
• Ambient temperature: -20 to +50 °C

Why choose it

This relay offers reliable level detection for conductive liquids, with adjustable sensitivity to accommodate different liquid conductivities. The filling/emptying selection makes it versatile for both tank filling and drainage applications. Its compact DIN rail housing saves panel space, and the LED indicator provides clear status at a glance.

Ideal use cases

• Controlling pumps in water tanks and reservoirs
• Monitoring liquid levels in industrial processes
• Protecting pumps from dry running
• Alarm signaling for high or low level conditions

Good to know

The relay is designed for use with conductive liquids; non-conductive liquids require additional sensors. Electrodes are not included and must be selected based on the application. The relay's dielectric strength between input and output is 4 kV AC, providing isolation between the control circuit and the load.