Level measurement-Vibrating switchesLK50

 LK50 is a standard vibrating level switch for material detection in liquid and slurry applications such as overflow, high,

low, and demand applications, as well as pump protection.

• Proven vibrating level switch technology for liquids

• Compact insertion length of 40 mm (1.57 inch) for confined

space applications

• Fault monitoring for corrosion, loss of vibration or line break to

the piezo drive

Output

Output options • Relay output (DPDT),

2 floating SPDTs

• Contactless electronic switch

• 2-wire Namur signal output

• Transistor (NPN/PNP) 10 ... 55 V DC

• 8/16 mA

Measuring accuracy

Repeatability  0.1 mm (0.004 inch)

Hysteresis  Approx. 2 mm (0.08 inch) with

vertical installation

Switching delay  • Standard, Extended: approx.

500 ms (on/off)

• High temperature: approx. 1 s

(optionally adjustable at factory)

Frequency  • Standard, Extended:

Approx. 1 200 Hz

• High temperature: 1400 Hz

Rated operating conditions

Installation conditions

• Location  Indoor/outdoor

Ambient conditions

• Ambient temperature  -40 ... +70 °C (-40 ... +158 °F)

• Storage temperature -40 … +80 °C (-40 … +176 °F)

Medium conditions

• Temperature

 Standard  -50 ... +150 °C (-58 ... +302 °F)

• Tuning fork  316L (1.4404 or 1.4435), Alloy C22

• Extension tube

[ø 21.3 mm (0.839 inch)]

316L (1.4404 or 1.4435), Alloy C22

• Process connection: threaded  • Standard, Extended:

316L (1.4404 or 1.4435), Alloy C22

• High temperature: Inconel 718

• Process connection: flange  316L (1.4404 or 1.4435), 316L with

Alloy C22, ECTFE, or PFA coating

• Process seal  Klingersil C-4400

Process connection

• Pipe thread, cylindrical (ISO 228 T1) G ¾" A, G 1" A

Supply voltage

• Relay DPDT  20 ... 253 V AC, 50/60 Hz,

20 ... 72 V DC

datasheet-LK50-en-250-2.pdf

Key Applications: for use in liquids and slurries, for level

measurement, overfill, and dry run protection