Page 357 - Bürkert

Tuning-Fork Level Switch

8110 / 8111 G 3/4”, G 1” and clamp 2”

• For universal use as overfill
or dry run protection system

• Hygienic surface finish
• Extension tubes available
Type 8111

Type 8110

Level switch for liquids with a tuning fork as a sensor element. Simple Envelope Dimensions [mm] (see datasheet for details)
setup without adjustment makes this perfect for deployment into process
environments. This device provides peace of mind from overfill or run dry
Type 8110
Type 8110 - The small tuning fork (40 mm length) can be used in ves-
sels, tanks or pipes.
Type 8111 - SuperBRIGHT visual output lets the user know the status
from a distance.

Technical Data D
Type 8110 8111
Process connection G 3/4”, G 1” or G 3/4”, G 1” or
Clamp 2” Clamp 2” C
Max. fluid +100 ºC G +150 ºC G
temperature +150 ºC Clamp +150 ºC Clamp
Materials Stainless / PEI housing Stainless / PBT housing
Stainless steel forks Stainless steel forks A
®
®
Klingersil seal Klingersil seal D
Max. fluid pressure 64 bar 64 bar
Voltage supply 10-55V DC / max. 0.5W 20-253V AC (5 A),
50-60 Hz, or 20-72V DC
Electrical M12 M20 cable glands B
connections
Outputs Transistor output PNP, Relay (DPDT), 2 floating
250 mA SPDTs
Ingress protection IP66 and 67 IP66 and 67
Surface finishing Ra < 3.2 µm (thread) Ra < 3.2 µm (thread)
quality Ra < 0.8 µm (clamp) Ra < 0.8 µm (clamp) Type 8111
Dynamic viscosity 0.1 to 10000 mPa.s / 0.1 to 10000 mPa.s /
0.7 to 2.5 g/cm 3 0.7 to 2.5 g/cm 3
Medium temperature -40 °C to 100 °C -50 °C to 150 °C C
(150 °C for Clamp
process connection)
Medium pressure -1 to 64 bar -1 to 64 bar
Accuracy A
Hysteresis Approx. 2 mm with Approx. 2 mm with
Delay time/ vertical installation vertical installation
Frequency Approx. 500 ms / Approx. 500 ms / B
Approx. 1200 Hz Approx. 1200 Hz
Voltage loss Max. 1 V DC Type A B C D
Turn-on voltage Max. 55 V DC min.: 10 mV; max.: 253 8110 3/4” G 21.3 158 31.7
VAC, 253 V DC 1” G 21.3 161 31.7
Switching current min.: 10 mA; max.: 5 A 2” clamp 21.3 165 31.7
(AC), 1 A (DC) 8111 3/4” G 16 210 91
1” G 16 213. 91
2” clamp 16 213 91

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