Siemens SITRANS LUT400 Continuous Ultrasonic Level Controllers

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Long range single point continuous ultrasonic level monitor and controller for continuous level, or volume measurement of liquids, slurries, and solids, and high accuracy monitoring of open channel flow. Compatible with Echomax transducers ST-H, XPS-10, XPS-15/15F, and XRS-5 at a range of 1 to 196 feet (0.3 to 60 meters), and can be used in environments with temperatures up to 122°F. Wall- or panel-mount models. Front-panel pushbuttons for programming plus HART communications standard.

Territory Restriction: 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

Siemens SITRANS LUT400 series controllers are compact, single point, long-range ultrasonic controllers for continuous level, or volume measurement of liquids, slurries, and solids, and high accuracy monitoring of open channel flow. Key applications include wet wells, reservoirs, flumes and weirs, hoppers, crusher bins, or storage for chemicals, liquids or dry solids. They feature an easy-to-use local interface with four-button programming, menu-driven parameters, and wizard support for key applications.

SITRANS LUT400 comes in three different models, depending on the functionality you need: SITRANS LUT420 level controller for level or volume measurement of liquids, slurries, and solids, as well as basic pump control functions, including service ratio pump routine and discrete input pump interlocks, a 9 digit totalizer, and basic data logging capability. SITRANS LUT430 level, volume, pump and flow controller includes all features of the LUT420 plus a full suite of advanced pump control and alarm functionality, open channel flow monitoring, and basic flow data logging capability.

SITRANS LUT440 high accuracy OCM is the highest accuracy Open Channel Flow model, and replaces the retired Milltronics OCM-III open channel flow monitor when used with the XRS-5 Echomax level sensor and the TS-3 temperature sensor. It includes all features of the LUT430, plus the industry’s best accuracy (± 1 mm within 3 m), full suite of advanced control functionality, and enhanced flow logging capability including daily summary of min/max, average flow rates and total. It is MCERTS-certified for open channel flow applications.

  • HART + 4/20 mA + three relay outputs standard. The 4-20mA output is conveniently field wired as either a passive loop-power output or an active (powered) output
  • Compatible with Siemens Echomax transducers ST-H, XPS-10, XPS-15/15F, and XRS-5; Add optional submergence shield for protection and to sense flooding or overfill conditions
  • Local display and user interface with four-button programming and English prompts — no more codes to remember, no handheld programmer needed
  • Siemens' patented Sonic Intelligence evaluates and adjusts for noise levels, echo strength, and changing process conditions
  • Removable terminal connections make it easy to wire and install
  • LUT440 replaces the retired Milltronics OCM III for open channel flow applications
  • 1/2 DIN IP65/NEMA 4X polycarbonate enclosure with universal mounting bracket for wall, pipe, and DIN rail standard; panel mount kit optional
  • CSA, CE, FM, UL listed for general purpose use, CSA Class I, Div 2, Groups A-D, Class II, Div 2, Groups F-G, Class III non-incendive for hazardous environments
  • Optional TS3 external temperature sensor used for high accuracy temperature compensation measurements in open channel flow applications

Supported by

Siemens Advantage Plus

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 (for high accuracy Open Channel Flow measurements order a TS-3 temperature sensor from accessories below and order an Echomax XRS-5 Transducer separately)
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
TS-3 External Temperature Sensor with 1m (3.28ft) Cable, 3/4" NPT Connection, CSA Approved

More Information
Point or Continuous Level Continuous
Level Media Liquid, Slurry, Dry Solid
Level Technology Ultrasonic
Measuring Range 1 to 195 Feet (0.3 to 60 Meters)
Wetted Materials Depends on transducer

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