Liquid level detector for detecting a liquid level when reaching a prescribed height

摘要: A liquid level detector for detecting whether a boundary surface between and medium rises beyond prescribed comprises rectangular prismatic refractor body formed of material which only allows the transmission light having particular wavelengths absorbs other wavelengths. The have first second inclined flat surfaces base. base is provided with light-emitting element projecting beam wavelength photoelectric conversion converting to an electric signal. Each these equidistantly spaced from center base, optical axis each elements defines angle 45° body. Where contacts medium, passes through body, totally reflected surfaces, finally enters element. liquid, refracted on receives substantially no generates