LS7000/2 Dual-Point Level Sensor

The LS7000/2 dual-point RF level switch uses the proprietary radio frequency (RF) balanced impedance bridge. It is specifically designed to automatically fill or empty a tank, vessel or sump. The high and low set points are adjustable over the entire length of the probe. This unit is designed for use in homogeneous liquids.

The dual-point level switch uses a single relay (DPDT 5 amp) and an on-board latching circuit for automatic operation. No external latching relays or holding contacts are required. Simply wire the relay output in series with the pump.

To automatically fill a vessel, select "AUTO-FILL" on the electronics, and the relay will energize when the material is below the "LOW" set point. The pump will turn on and continue to run until the level reaches the "HIGH" set point, then shut off. For "AUTO-EMPTY", the relay action is reversed.

Designed for use in homogeneous liquids only. Coated probe is required for fluids with dielectric constant greater than 12.

The probe is made of a HALAR coated 316 Stainless Steel Rod, 1" NPT process connection and the insulator is made of Teflon. The standard coating is HALAR, but other options such as a Teflon Sleeve are available. The seals are made with Viton "O" rings. All the electronics are housed in a cast aluminum explosion-proof enclosure.

All the necessary calibration indicators are on-board so all you need to calibrate the LS7000/2 is a small screwdriver. 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.

Product Features:

  • Field selectable Auto Fill or  Auto Empty
  • Solid state, no moving parts
  • Simple installation and calibration
  • Explosion proof housing standard
  • On-board fuse protection
  • User Programmable time delay
  • Modular electronics easily replaced


  • Auto Fill/Auto Empty
  • Pump control


  • Water
  • Acids/Caustics
  • Fuels/Oils
  • Solvents



Power: 115VAC (+/- 15%) 50/60Hz, 2 watts STANDARD (12 VDC, 24VDC or 230VAC Optional) Output: 2 Form C Contact DPDT relay, 5 amp resistive at 125, 230VAC; 30VDC On Board Fuse: .5 A RF Frequency: Approx. 1.3 MHz


Temperature for Teflon: insulator -30F to 450F

Temperature for electronics: insulator -30F to 450F

Pressure: 1500 psi @ 75F (Higher on request)

Hazardous Area: Housing Class I, Group D; Class II, Groups E, F & G

Ordering Information 

Standard Probe Style
MODELSupply Voltage“H”- Halar Probe
“T”- Teflon Sleeve Probe
Probe length in inches
LS7000/2 115VAC H 10"

* This describes an LS7000/2, powered by 115VAC with a HALAR coated probe and a 10" probe. The probe length is measured from the end of the process connection to the tip of the probe.

Special materials of construction are available


LS7000/2 Dual Point Level Switch

dual point level switch