Before revision: Well-known manufacturers of the highest quality Bi-Colour Level Gauges are FPS-Aquarian, IGEMA and Quest-Tec Magnetic indicator In a magnetic indicator is a float on the surface of the liquid contains a permanent magnet.
After revision: Klinger,Well-known manufacturers of the highest quality Bi-Colour Level Gauges are FPS-Aquarian, IGEMA and Quest-Tec Magnetic indicator In a magnetic indicator is a float on the surface of the liquid contains a permanent magnet.