Level Measurement
Continuous level measurement
Ultrasonic transmitters
SITRANS Probe LU
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Overview
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SITRANS Probe LU is a 2-wire loop powered ultrasonic transmit-
ter for level, volume and flow monitoring of liquids in open chan-
nels, storage vessels, and simple process vessels.
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Benefits
• Continuous level measurement up to 12 m (40 ft) range
• Easy installation and simple startup
• Programming using infrared Intrinsically Safe handheld
programmer, SIMATIC PDM or HART Communicator
• Communication using HART or PROFIBUS PA
• ETFE or PVDF transducers for chemical compatibility
• Sonic Intelligence signal processing
• Auto False-Echo Suppression for fixed obstruction avoidance
• Level to volume or level to flow conversion
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Application
The SITRANS Probe LU is ideal for level monitoring in the water
and wastewater industry, chemical storage vessels, and small
bulk hoppers.
The range of SITRANS Probe LU is 6 or 12 m (20 or 40 ft). Using
Sonic Intelligence, Auto False Echo Suppression for fixed ob-
struction avoidance, and accuracy of 0.15 % of range or 6 mm
(0.25 inch), the Probe LU provides unmatched reliability.
The Probe LU offers two communications options: HART or PRO-
FIBUS PA (Profile version 3.0, Class B).
The transducer on the Probe LU is available as ETFE or PVDF to
suit the chemical conditions of your application. As well, for ap-
plications with varying material and process temperatures, the
Probe LU incorporates an internal temperature sensor to com-
pensate for temperature changes.
• Key Applications: chemical storage vessels, filter beds, liquid
storage vessels
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Siemens FI 01 · 2018
© Siemens AG 2018
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Configuration
Parabolic mounting
Flat mounting and beam angle
Pipe
Rungs
Seams
SITRANS Probe LU mounting
Fill
10°
Beam angle