Level sensors

Flexible and robust – Tuning Forks for all kinds of liquids

Your Benefits

  • Easy installation and commissioning, no calibration necessary
  • Easy operation and integration, saves time
  • Maintenance-free sensor, reduces downtime
  • Testing in place possible – no mounting required, which reduces installation time
  • Flexible and tough system for a multitude of applications
  • Universal technology works in all kinds of liquids


Flexible and robust – Tuning Forks for all kinds of liquids

The LFV300 product family of universal vibrating level switches precisely detects predefined liquid levels in systems to the millimeter – even under difficult operating conditions. The switches can emit a signal to prevent overfilling, a switching signal for refilling, or a dry-run signal for pump protection. The LFV300 works independently of the liquid and is wear-free and maintenance-free. A wide selection of flange, threads, and hygienic connections together with a modular device concept enable customer-specific solutions. The device is suitable for hygienic applications and can be cleaned using SIP/CIP. There are also variants for use in explosive atmospheres, to prevent overfilling in compliance with WHG, and with marine certification (GL). Besides the rugged LFV310 standard device, there are LFV330 tube-extended variants for reliable vertical mounting to bridge sensing ranges up to 6 m.

At a glance
  • Choice of various housing materials and electrical output signals
  • Commissioning without filling
  • Process temperature up to 250 °C
  • Immune to deposit formation
  • Very high repeatability
  • Hygienic designs according to EHEDG and FDA, compatible for CIP and SIP
  • ATEX approval available
  • Tube extension up to 6 m in length


Technical overview

  • Technical data overview

    Technical data overview

    Measurement principleVibrating level switch
    Detection principleContact
    Process temperature–50 °C ... +250 °C, See safety notes for ATEX devices
    Process pressure–1 bar ... 64 bar
    Output signal

    Non-contact switch

    Double relay (DPDT)

    1 x PNP/NPN

    NAMUR signal

    Accuracy of sensor element± 2 mm
All technical data can be found accompanying the individual product