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The Power Electronics PT414-8 level controller monitors the level of conductive liquids in tanks and boreholes, and connects to suspended-type electrodes. It measures the liquid’s resistance between the electrodes: the relay activates when the liquid reaches the upper electrode and deactivates when the level falls below the middle electrode.
The lowest of the three electrodes serves as a reference point and can be replaced by the ground connection in a metal tank. The safe, low AC voltage between the electrodes prevents electrolysis, while the resistance between them must be less than 20 kΩ.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.