Due to our territory agreement with Siemens, Lesman is the authorized Siemens sales representative in Illinois, Indiana, Wisconsin, Eastern Missouri, Michigan's Upper Peninsula, and the Paducah, KY area. If you are outside that area, you can find your local sales office or get technical assistance by calling 800-365-8766 or 972-522-4500, or sending an email to piabusales.industry@siemens.com.

Siemens SITRANS LUT400 Ultrasonic Controller for Continuous Level Monitoring

Siemens SITRANS LUT400 high-accuracy ultrasonic level controller takes the knowledge from a million successful Siemens level installations and puts them into a single unit. It combines high accuracy and application flexibility in an easy-to-use, easy-to-install, and easy-to-configure device.

The LUT440 model replaces the retired Milltronics OCM-III ultrasonic controller for open channel flow applications.

Key Specifications

  • ±0.04" (1mm) accuracy for the utmost confidence in your measurements
  • Local display and user interface with four-button programming and English prompts — no more codes to remember. Just follow the setup wizards and use the arrow keys to select the option you need.
  • Siemens' patented Sonic Intelligence evaluates and adjusts for noise levels, echo strength, and changing process conditions
  • The first Siemens ultrasonic transceiver/controller with built-in HART® communications
  • Out-of-the box ready for wall, pipe, or DIN-rail mounting. Panel mounting kit also available
  • Removable terminal connections make it easy to wire and install
  • Compatible with Siemens Echomax ultrasonic transducers
  • Replaces the retired Milltronics OCM III for open channel flow applications

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

A complete catalog number will look like this: 7ML5050-_ _ _ _ _-_ _ _ _-Z
Description Catalog
SITRANS LUT400 Single Channel Ultrasonic Controller 7ML5050-
Model SITRANS LUT420 Level Controller
SITRANS LUT430 Level, Volume, Pump, Flow Controller 
SITRANS LUT440 Open Channel Flow Monitor
0A_ _ _-
0B_ _ _-
0C_ _ _-
With display
With remote panel mount display
No display (blank lid provided)
_ _A_ _-
_ _B_ _-
_ _C_ _-
Input Voltage 100 to 230 VAC ± 15%
10 to 32 VDC
_ _ _ 1_-
_ _ _ 2_-
Cable Inlet 3 cable inlets, cable glands not supplied
3 cable inlets, M20 plastic cable glands supplied
_ _ _ _1-
_ _ _ _2-
Approvals General purpose CE, FM, CSA US/C, UL, C-TICK
CSA Class I, II, III Div 2 Groups A-G
Manufacturer's test certificate
Stainless steel tag: Max. 27 characters plain text
Preset NAMUR NE43 Failsafe setting <3.6mA
Documentation Printed English User Manual
Printed Communications Manual
Accessories Stainless steel tag, 0.47 x 1.77", one text line
Panel Mount Cable Extension 2.5 m (8.2 ft)
3-Pack Cable Glands and Retaining Nuts
LUT400 Sunshield, 304 Stainless Steel


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Video is a great way to learn about instruments and technology, and it's available whenever you need it. Watch step-by-step instructions on how to configure a level transmitter or use Siemens' Sonic Intelligence algorithms. We'll post videos we create, and those our manufacturer partners share with us, so you don't have to look in multiple places to find the video training you need.

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