ELS-1100 series single-point, optical level switch from Gems Sensors is a compact, economical, no-moving-parts, polysulfone level sensor with built-in switching electronics. It's available with a variety of mountings, power requirements and electrical terminations. ELS-1100 is 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. It's not recommended for use in any liquid that crystallizes or leaves a solid residue.