The Flowline LZ12 vibration level switch provides reliable liquid level detection of dirty liquids such as those with light to medium coating, scaling or foaming characteristics with a relay output. Media examples include wastewater, diluted caustic soda and light weight oil. For optimum performance, the liquid level switch automatically adjusts for coating build up, and if necessary, outputs a proactive maintenance alarm to request cleaning. The submersible liquid level sensor is universally mounted through the tank wall or inside the tank as a high level alarm or low level alarm.