Level Instrumentation > Transmitters > Siemens SITRANS LU150/LU180


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Siemens SITRANS LU150 and LU180 Short-Range Non-Contacting Ultrasonic Level Transmitters

Siemens' SITRANS LU150 is a short-range integrated ultrasonic level transmitter for use with liquids, slurries, and bulk materials in open or closed short-depth vessels (from 0.8 to 16.4 feet). This general purpose, two-wire, 4 to 20 mA loop powered transmitter features an integrated ultrasonic transducer is available in PVDF copolymer, making the LU150 suitable for a variety of applications. The SITRANS LU150 is an ideal replacement for the Milltronics Probe with 4-20 mA output. If you need HART communications, see the Siemens SITRANS Probe LU.

The new SITRANS LU180 has the same functionality as the LU150 plus intrinsically safe approval (CE cCSAus, ATEX, FM, CSA, IECEx, and NEPSI) for use in harsh environments.

Both SITRANS LU150 and LU180 include patented Sonic Intelligence echo processing algorithms to discriminate between the true echo and false echoes from acoustic or electrical noises and agitator blades in motion. The ultrasonic pulse propagation time to the material and back is temperature-compensated and converted into distance for display, and analog output.

Key Specifications

  • Proven ultrasonic technology: Replaces Milltronics' "The Probe" (4-20 mA output models)
  • For liquids, slurries, and bulk materials in open or closed tanks
  • Measuring range 0.8 to 16 feet (0.25 to 5 meters)
  • Accuracy ±0.25% full scale
  • PVDF transducer with integral temperature compensation
  • 2" NPT, BSP, G or 4" Tri-clamp connections available
  • General service or intrinsically safe approvals
  • Click here to view our full offering of Siemens Milltronics level instrumentation

Specifications, Manuals, and Supporting Literature

Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

Description Catalog Number Availability
SITRANS LU150 General Purpose 4-20 mA Output Level Transmitter 7ML5201-  
SITRANS LU180 Intrinsically Safe 4-20 mA Output Level Transmitter 7ML5202-  
2" NPT OE _ _ -
R 2" BSPT OF _ _ -  
G 2" BSPP OG _ _ -  
4" Sanitary Mount OJ _ _ -  
Cable Inlet M20 x 1.5" _ _ A0  
M20 x 1.5", Cable Gland Included _ _ B0  
1/2" NPT Stainless Steel Entry _ _ C0
Accessories Printed English User Manual A5E34590123  
4" Sanitary Mounting Clamp 7ML1830-1BR  
Stainless Steel Tag 7ML1930-1AC
Universal Box Bracket Mounting Kit 7ML1830-1BK
Universal Mounting Adapter for 3" Flange, 2" NPT 7ML1830-1BT  


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