Vibex™ LSV1 Vibrating Level Switch, Flocorp-Level Switches

Vibex™ LSV1 Vibrating Level Switch 

Vibex™ LSV1 Vibrating Level Switch

This universal vibrating level switch is an ideal instrument for accurate point level detection in liquids. Using vibrating fork technology, this device will detect the change in its natural resonant frequency (1.100 Hz) which is driven by an internal piezoceramic element inside the sensor. The frequency will change when the sensor is covered to a known point on the vibrating fork upon which the sensor will send a switching output. If the vibrating fork is not covered by a liquid, its natural resonant frequency changes back and so do the state of the switching output. Typical applications include washing, filling, cooling and lubricating systems, sump level and bulk holding tank level control.

Features & Benefits

  • Simple, compact design
  • Extremely reliable
  • Setup without adjustment or calibration
  • Independent of liquid properties and installation conditions
  • No moving parts, thus wear and maintenance-free
  • External test option using test magnet
  • Suitable for temperatures up to 150º C (302º F)

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Electrical Data
Switching Output TypeTransistor (For connection to binary inputs of a PLC with an input resistance <100kΩ)
Supply Voltage10 to 31 VDC
Load Current Max.

250mA (output is overload and permanently

short-circuit protected)

Off-State Current (Load Off)


< 10uA

Voltage Drop< 1V
Power Consumption Max



Protection ClassIP66/67
Over-voltage Category




Connection Plug

M12x1, 4-Pin (See order code for adding the mating - M12 cable)

Measurement Performance

(Reference Condition: Density .7g/cm3

Hysteresis0.08in (2mm) 3mm +/- 5mm




Switching Point (Nominal)

Vertical Installation: 0.51in (13mm) above tip of fork (indicated by a small notch on the outside of the fork paddles)

Horizontal Installation: Center axis of the fork paddle (indicated by an elogated ridge on the outside of the fork paddles) Switching point

is in any liquid definitely located on the fork

paddle area

Switching DelayOn: 0.5s / Off: 0.5s
Application Conditions


Dielectric Constant


No restriction (Suitable for all oils, ie: cutting, grinding and hydraulics oil; collant; erosion dielectric fluid; cleaning and  degreasing agents; solvents; all liquid lubricants; water and water-based liquids)
ConductivityNo restrictions



0.025 to 0.9lbs/in3 (0.7 to 2.5g/cm3)

(Not suitable for substances with very low

density, ie. propane)


Dynamic Viscosity

0.1 to 10,000cP (0.1 to 10.000mPa s)

(Not suitable for very viscous or adhesive


Solid Content in the Liquid

Max. 0.2in (5mm) diameter of solid particles

contained in the liquid can be used in slurries

Foam/Air BubblesInsensitive to foam and air bubbles




Avoid situations where a substance coats and dries on the fork, thus creating excessive build- up/caking on the fork or even bridge the fork (ie. dense paper slurries, bitumen)
Application TemperatureF: -40º to + 212º or -40º to + 302º C: -40º to + 100º or -40º to +150º
Ambient TemperaureF: -40º to 158º C: -40º to 70º
Temperature ShockNo restrictions
Application Pressure


-14.5 to 580 PSI (-1 to 40 Bar)

Mechanical Data
Ingress Protection Rating


M12x 1 plug: IP66/IP67

Connection Size3/4" or 1/2"
Thread TypeNPT (US) or G (Metric)
Surface Finish [Ra]1.26in-4 (<3.2um)
Material All Metal Parts


1.4404 (316L)

Other Materials

Flat seal: Klingersil C -4400, Plastic End Cap:


Download Datasheet: Vibex™ LSV1 Vibrating Level Switch, Flocorp-Level Switches