Harmony Control. This level relay monitors the level of conductive, non-flammable liquids (conductive measuring principle) as a limit switch. It can also be used to control liquid levels in a 2-point control during filling and emptying. For this purpose, additional conductive level electrodes are hung in the tank. The measuring principle enables the distinction between liquid and foam. Two relay changeover switches are available for reporting, which can be loaded up to 5 A. The limit value can be set for the resistance value (250 Ohm-1 MOhm) and a time delay for the relays. The settings are made using controls on the front, which can be protected against changes under a transparent cover. 3 LEDs show the device status. The wide-voltage power supply (24-240 VAC/DC) enables universal use. The cable connection is made using screw terminals.