The 8111 is a vibrating level switch for liquids,using a tuning fork for level detection.It is designed for industrial use in areas ofprocess technology and can be used in liquids.Typical applications are overfill or dry run protection.Depending on the version it is also used formonitoring or control of levels in hazardousenvironments, even for combustible liquids,

gases, fogs or vapours.Due to the simple and rugged measuring system, the 8111 is virtually unaffected by the chemical and physical features of the liquid.It works even under unfavourable conditionssuch as turbulence, air bubbles, foam generation,

buildup or varying products.

Materials

Housing / Cover / Seal ring

Wetted parts

Tuning fork and process fitting

Process seal

PBT, Stainless steel 316L (1.4435) / PC / EPDM

Stainless steel 316L (1.4435)

FKM

Weight approx. 890 g

Electrical connections 1 or 2 cable glands M20 x 1.5 (depends on output version)

Process fitting Thread G, NPT 3/4”, G, NPT 1” or Clamp 2”

Surface finishing quality Ra < 3.2 μm (thread) / Ra < 0.8 μm (Clamp)

Viscosity dynamic 0.1 up to 10000 mPa.s (requirement: with density 1)

Density 0.5 up to 2.5 g/cm3 (selected by DIP switch) or

0.7 up to 2.5 g/cm3

Fluid temperature -50 up to 150°C (-58 to 302°F)

Fluid pressure -1 to 64 bar (-14.51 to 928.64 PSI)

Accuracy

Hysteresis

Delay time / Frequency

Approx. 2 mm with vertical installation

Approx. 500 ms / Approx. 1200 Hz

Output Double relay output or Namur output