LS7000/2 Dual-Point Level Sensor

Field selectable Auto Fill or  Auto Empty;
Solid state, no moving parts;
Simple installation and calibration;
Explosion proof housing standard;
On-board fuse protection.

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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 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 a pump starter or solenoid valve.

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.



  • 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: Probe:  -30F to 340F - HALAR
                                    -30F to 250F – TEFLON SLEEVE

Pressure: 1500 psi @ 75F – 1” NPT STANDARD
                 300 psi @ 75 F – ¾” NPT (Optional)

Hazardous Area: Housing is CSA and UL approved for Class I, Div. 1, Groups C & D;  Class II, Groups E, F & G

Industrial Technical Services from Mississauga, Ontario is a single source Instrumentation and Automation company. We provide certified calibrations, PLC programming, custom controls and Panels.

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