Ultrasonic Flowmeter – Non Contact Type SITRANS PROBE LU Previous ProductNext Product

Unbeatable accuracy in ultrasonic level measurement

World’s First Flow-Liquid System

Ultrasonic Non-Contact level/flow measurement has been in use around the world since 1970’s as witnessed by the popularity of these meters that continues unabated in virtually all sectors of industry. Anodyne together with SIEMENS presents the state of the art and most commonly used level/flow sensor, SITRANS PROBE LU for open channel application. SITRANS L non-contacting ultrasonic level products provide continuous monitoring of wet wells, flumes, and weirs with reliable level-to-flow calculations.


Electromagnetic Flowmeters are based on Faraday's Law of Electromagnetic Induction.

It is suitable for monitoring of level, flow and volume in storage vessels and simple process vessels, as well as in open channels. The range on the Probe LU is 6 or 12 meters (20 or 40 feet). It uses Auto False-Echo Suppression for fixed obstruction avoidance, and also boasts improved signal-to-noise ratio for improved accuracy to 0.15% of the range or 6mm (0.25"). This is unmatched reliability. • Continuous ultrasonic level measurement up to 12m (40ft) range
• Easy installation
• Programming using infrared intrinsically safe hand-held programmer
The SITRANS Probe LU ultrasonic level transmitter uses the latest technology, with Sonic Intelligence signal processing strength, new echo processing features and the latest micro-processor and communications. The Probe LU level transmitter has two communication options: HART and PROFIBUS PA (Profile version 3.0, Class B).



Chemical storage vessels

Small bulk hoppers

Filter beds

Liquid storage vessels


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


Range 0.25 – 12 m
Working Pressure 0.5 bar g (7.25 psi g)
Working Temperature -40 to 85 °C (-40 to 185 °F)
Wetted Parts ETFE or PVDF transducers for chemical compatibility
Material (enclosure) PBT (Polybutylene Terephthalate)
Material (transducer) Buna-N seal with ETFE (Ethylene Tetrafluoroethylene) or PVDF (Polyvinylidene Fluoride)
Resolution 3 mm (0.12 inch)
Accuracy ± the greater of 0.15 % of range or 6 mm (0.24 inch)
Repeatability 3 mm (0.12 inch)
Output 4 – 20 mA
Display Local: LCD display with bar graph
Remote: Available via HART or PROFIBUS PA
Display units All standard engineering units in m3, litre, gallon, ft3, imperial gallon
Configuration Using Siemens SIMATIC PDM (PC) or HART handheld communicator or Siemens infrared handheld programmer
Power Supply 4 – 20 mA/HART Nominal 24 V DC with 550  maximum; maximum 30 V DC 4 ... 20 mA
PROFIBUS PA 12, 13, 15, or 20 mA depending on programming (General Purpose or Intrinsically Safe version) per IEC 61158-2
Protection Class Type 4X/NEMA 4X, Type 6/NEMA 6/ IP67/IP68 enclosure
Cable Length for Remote Transmitter As required
Installation Non-Contact (Flange Connection: 3 inch (80 mm) universal flange)


SITRANS Probe LU Ultrasonic Flow Sensor
SITRANS Probe LU240 Ultrasonic Flow Sensor (Battery and Solar Power Friendly)


OEM Ultrasonic Controller/Transmitter

Model Number: SITRANS LUT 400 series

OEM Multi-Channel Controller

Model No.: MultiRanger 200 HMI

External Controller

Product Code: AN-EXT-CNTLR


Product Code: AN-COMM
Cloud Data Logger Interface • Connection via SIM, LAN
• Secured tamper proof data transfer