ELS-1100 Series Single-Point Level Switch is a compact, economical, no moving parts polysulfone level sensor with built-in switching electronics. A variety of mountings, power requirements and electrical terminations are available. These level switch units are suitable for high, low or intermediate level detection. Installation is simple and quick through the tank top, bottom or side. The sensor offers ±1 mm repeatability and broad liquid compatibility. They are not recommended for use in any liquid that crystallizes or leaves a solid residue.