level switch-optiswitch 3300


Vibration level switch with rigid extension for solid applications

  • Point level detection of solids
  • Probe length: up to 6 m / 20 ft
  • Density: <8 g/l / <0.49 lb/ft3
  • -50…+250°C / -58…+482°F; -1…16 psig / -14.5…232 psig

The OPTISWITCH 3300 is a vibration level switch with tube extension for applications with bulk solids or powders. This robust level device detects the MIN or MAX levels of abrasive media and operates reliably even in applications with extremely low density. Its tube extension enables level detection in thick-walled silos or for a more flexible position of the switching point, e.g. in media that form a cone of bulk goods.

  • Abrasion resistant and highly robust tuning fork
  • Simple setup without product
  • Unaffected by product properties (maintenance-free)
  • Optional version to detect solids in water
  • Remote housing up to 25 m / 82 ft
  • Silos with light bulk goods
  • Limit and overfill detection
  • Detecting solids in water
Measurement principles Vibrating
Level measurement type Point level detection
Measured media Bulk solids, Granulates, Powders, Solids
Contact to measured medium Yes
Interface measurement No
Probe length 0.3…6 m/
1…20 ft
Process pressure (relative) -1…16 barg/
-14.5…232 psig
Process temperature -50…250°C/
Wetted parts Austenitic stainless steel (1.4404/316L)
Process seals EPDM, FKM/FPM, Kalrez® 6375, PFA

Products Details

Alternative product categoriesTuning fork, Vibration fork, Vibronic


Certificates/Approvals ExATEX, CSA, EAC, FM
Certificates/Approvals SafetySIL2
Ingress protectionIP66/67, NEMA4/4X/6


Binary outputs2-wire, Contactless, NAMUR, Relay, Transistor

Process connections

Flange connectionsEN (1092-1): DN50…200
ASME (B 16.5): 2…4″
Thread connectionsMale:
G1 1/2
1 1/2 NPT
Hygienic connectionsTri-Clamp®: 2″

*More instruments are available, please liaise with us if any of your required instruments is not listed above.