Starting at $117.00
Minimum Order Quantity of 5 Items.
  • Usually ships in 2-3 weeks



  • HTS Version - 1/2" Long
  • UL Approved
  • Isoplast Housing and Prism
  • Operating Temperature: -40 to 212 PSI
  • Operating Pressure: 150 PSI
  • Output: TTL/CMOS Compatible. Transistor Output with 10K Pull Up Resistor May Sink 18 mA. 12 VDC input power units switch a maximum 5 VDC on output
  • Repeatability: ±1 mm


The Gems ELS-1100HT series is a low cost, compact, optical, level sensor with built-in switching electronics. With no moving parts, these small units are ideal for a variety of high temperature point level sensing applications especially where dependability and economy are a must. Made from high performance Isoplast plastic, the ELS-1100HT series maintains broad chemical compatibility and suitability for fluid temperatures to 212°F. Among the smallest of sensors, the HTS version is just 1/2" long.

The ELS-1100HT series is suitable for high, low or intermediate level detection in practically any tank top, 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 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.

Applications for the Gems ELS-1100HT Series flow switch:

  • Coolant reservoir monitoring
  • Medical diagnostic and sterilizer equipment
  • Low lubricant warning on machine tools
  • Low level warning in hydraulic reservoirs