100 Level Switches are low cost, compact, optical level sensors with built-in switching electronics. With no moving parts, these small plastic units are ideal for a variety of point level sensing applications especially where dependability and economy are a must. Of polysulfone construction, the ELSE 100 operates on 5 VDC or 10-28 VDC with 1 mm repeatability. The sensor offers broad liquid compatibility, however, it is not crystallizes or leaves a solid residue. These level switches are suitable for high, low or intermediate level detection in practically any tank, large or small.
Installation is simple and quick through the tank top, bottom or side.
Solid state switching ensures dependability over long service life. The electro-optical sensor contains an infrared LED and a light receiver. Light from the LED is directed into a prism which forms the tip of the sensor. With no liquid present, light from the LED is reflected within the prism to the receiver. When rising liquid immerses the prism, the light is refracted out into the liquid, leaving little or no light to reach the receiver.