LS2100 Loop-Powered Level Sensor

The LS2100 2-Wire Loop Power Level Switch can measure virtually any liquid or dry material making it an excellent choice for point level detection in a variety of industrial applications. The two wire design provides a current output and is perfect for use with PLC’s and DCS systems.  The LS2100 level switch has no moving parts to wear out, jam or break, so there is no need for regular maintenance or cleaning. Calibration is a snap, one piece construction makes installation quick and easy.


The proprietary radio frequency (RF) circuit has a wide tuning range and exceptional temperature stability. When the probe is installed, it is calibrated in the absence of material touching the probe. When the desired product comes into contact with the probe, the milli-amp signal on the 24 VDC Loop changes to indicate level.

The standard probe is made of a solid 316 stainless steel rod, ¾" NPT process connection and the standard insulator is made of Teflon. The standard seals are double Viton "O" rings on the probe and insulator. All the electronics are housed in a cast aluminum explosion-proof enclosure.

The solid stainless steel rod is available in a variety of lengths and is suited for liquids or bulk solids. These probes can be coated with Halar in lengths up to 72 inches.

A blind-end probe option is also available for applications where a wet material build-up may foul a horizontally mounted probe. The blind-end unit has no visible probe because the insulating material completely covers the sensing probe.

All the necessary calibration indicators are on-board so all you need to calibrate the LS2100 is a small screwdriver. Fail-safe electronics provide peace of mind. The modular electronics make trouble shooting and repair a snap. The entire unit is backed by our two year warranty, 60 day money back guarantee. Flanged process connections and other materials of construction are available. Please consult factory.

Babbitt also offers Audible & Visual Alarm Boxes that can be used to accompany any of our single point, dual point or multi-point level switches. Alarm boxes provide simple and reliable warning of high or low-level alarm conditions in tanks, vessels, silos, hoppers, sumps, chutes and interface applications. To learn more, click the link here.

LS2100 2 Wire Level Switch

loop powered level switch

liquid level switch


  • Solid state, no moving parts
  • Simple installation and calibration
  • Explosion proof housing standard
  • Fail safe electronics


  • High or low level alarms
  • Sump control
  • Oil/water interface detection
  • Dry pump protection


  • Waste/Wastewater
  • Acids/Caustics
  • Chemicals/Oils
  • Slurries

Dry Solids:

  • Flour/Grains
  • Powders
  • Plastics
  • Sand/Cement



Power: Loop Powered 16-32 VDC

Output: Normal – 8mA
              Alarm  -  16mA
              Output is reversible

RF Frequency: Approx. 1.3 MHz


Temperature:  Probe             -30C to 400F
                         Electronics    -30C to 180F

Pressure: 300 psi @ 75F

Enclosure: Cast Aluminum, Explosion Proof -  Class I, Groups C & D; Class II, Groups E, F & G


Need assistance in selecting the right part number? Please fill out and submit an LS2100 data worksheet.