The lubricant level switches allows the operator to read the lubricant level. It is a visual indicator in the form of an oil gauge glass that is installed in most reservoirs. The float switches are used for electrical monitoring and it has one to three output signals. They are designed with a permanent magnet accommodated in the float body operates a reed contact located in the tubular guide. In the tubular guide at different heights, multiple contacts can be installed. Before the minimal lubricant level is reached, an early warning can be generated. Multiple proximity switches are required to show multiple lubricant levels.