Principle Of Operation - Siemens SITRANS LG240 Operating Instructions Manual

Application area
Functional principle -
level measurement
PBD-51041044
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Fig. 1: Layout of the type label (example)
1 Instrument type
2 Product code
3 Process and ambient temperature
4 Process pressure
5 Signal output electronics
6 Voltage supply
7 Protection rating
8 Order number
9 Identification code
10 Serial number of the instrument
11 Symbol of the device protection class
12 Reminder to observe the instrument documentation
13 ID numbers, instrument documentation
14 Hardware and software version
3.2

Principle of operation

The SITRANS LG240 is a level sensor with polished rod probe for
continuous level or interface measurement, particularly suitable for
applications in the food processing and pharmaceutical industry.
Optionally an autoclaved version with separable housing is available.
High frequency microwave pulses are guided along a steel cable or
a rod. Upon reaching the product surface, the microwave pulses are
reflected. The running time is evaluated by the instrument and output
as level.
SITRANS LG240 - Operating Instructions
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