Vibration level switch for liquids in hygienic applications

  • Point level detection of liquids in the food, beverage and pharmaceutical industry
  • Polished tuning fork to meet hygienic requirements
  • Density: ≥0.5 g/cm3 / 0.018 lb/in3
  • -50…+250°C / -58…+482°F; -1…64 barg / -14.5…925 psig

OPTISWITCH 5150 C – Version with stainless steel housing and Tri-clamp connection

Vibration level switch OPTISWITCH 5150 C – Version with stainless steel housing and Tri-clamp connection

The OPTISWITCH 5150 is a vibration level switch with polished tuning fork for liquid hygienic applications. It is a universal and reliable device for level detection in vessels. It detects low or high level and is mostly used for overfill, dry-run or pump protection. Installations in pipelines are also possible.

Product highlights

  • Polished tuning fork with a large choice of hygienic process fittings
  • Optional adapter for high temperatures up to +250°C / +482°F
  • Outputs: relay, transistor, 2-wire, NAMUR or contactless electronic switch
  • Optional gas-tight lead-through for toxic gases
  • In compliance with FDA and EC1935/2004

Typical applications

  • Hygienic applications in the food, beverage and pharmaceutical industries
  • Level detection, overfill protection, dry-run protection, pump protection

General information

Measurement principleVibrating
Level measurement typePoint level detection
Measured mediaLiquids
Contact to measured mediumYes
Interface measurementNo
Probe length80…6000 mm/
3…236 in
Process pressure-1…64 barg/
-14.5…925 psig
Process temperature-50…250°C/
Wetted partsAustenitic stainless steel (1.4404/316L)
GasketsEthylene propylene diene monomer (EPDM), Fluoroelastomer rubber (FKM/FPM), Kalrez® 6375, PFA

Process connections

Thread connectionsMale:
G¾, G1
¾ NPT, 1 NPT
Hygienic connectionsDairy screw (DIN 11851): DN40
Tri-Clamp®: 1", 1 1/2", 2"
Varivent®: N
SMS (1145): 38 mm
Fitting with compression nut: F40 (PN25)


Discrete outputs2-wire (8/16 mA), Contactless, NAMUR, Relay, Transistor


Certificates/Approvals Hygienic3A, EC 1935/2004, FDA

Related products

SU 502

Single channel controller for vibration level switches with 8/16 mA output

  • Signal conditioner for simple control of point-level detection via integrated relay
  • Optional 2nd relay: configurable as fail-safe relay or as second level detection relay
  • Designed for installation on a DIN rail
  • Approved for use in hazardous areas

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