Siemens SITRANS LU01 Ultrasonic Level Controller

SITRANS LU01 Ultrasonic Level Controller

  • Automatically Converses Automatic level-to-volume conversion for standard or custom tank shapes
  • Superior Reliability Features patented Sonic Intelligence echo processing software
  • Ultrasonic Controller Single-point, long-range level monitoring up to 60m (200ft)
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The Siemens SITRANS LU01 is an ultrasonic long-range level controller for solids and liquids in a single vessel measuring up to 60 m (200 ft). The system consists of a SITRANS LU01 monitor linked to a non-contact ultrasonic transducer that can be mounted up to 365 m (1200 ft) away. The LU01 features patented Sonic Intelligence® echo processing software for superior reliability and can measure distance, level or volume.

An on-board communications port automatically configures for RS-232, RS-485 or bi-polar current loop, and a backlit LCD displays readings in user-selectable linear engineering units. The LU 01 will connect to a PLC or DCS using Siemens SmartLinx® interface modules, giving you remote 2-way communication and full parameter access. Modules for popular industrial buses can be factory installed or added later to meet changing needs. The unit does not require an external gateway which reduces hardware and cabling costs. (Handheld programmer shown is an accessory and must be ordered separately)


  • Single point, long-range level monitoring
  • Compatible with all Echomax® transducers
  • Easy to install; easy to program using removable infrared keypad (optional)
  • Backlit LCD display with reading in standard engineering units
  • Automatic level-to-volume conversion for standard or custom tank shapes
  • High/low alarms
  • Dolphin Plus and SmartLinx compatible

Manufactured by: Siemens-Milltronics
Model: SITRANS LU01 Ultrasonic Level Controller

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Chemical storage
Liquid storage
Bulk solids storage (gravel, flour bins, grains cereals)
Plastic pellets


Mode of Operation
Measuring principle Ultrasonic level measurement
Measuring range 0.3 ... 60 m (1 ... 200 ft)
Measuring points SITRANS LU01: Max. one point;
Output Signal
Ultrasonic transducer Echomax series,
ST-H transducers
Relays 4 SPDT Form C relays, rated at
5 A at 250 V AC, resistive load
mA output 0/4 ... 20 mA, optically isolated
- Max. load 750 Ω, isolated, 30 V
- Resolution 0.1 % of range
- Outputs SITRANS LU01:
Max. one mA output
Error in measurement 0.25% of range or 6 mm (0.24”), whichever is greater
Resolution 0.1% of measuring range or 2 mm (0.08”), whichever is greater
Temperature compensation -50 ... +150 °C (-58 ... +302 °F)
• Integral temperature sensor
• External TS-3 temperature
sensor (optional)
• Programmable fixed temperature
Rated operating conditions
Ambient conditions
Ambient temperature for enclosure -20 ... +50 °C (-4 ... +122 °F)
Weight 2.7 kg (6 lbs)
Material (enclosure) Polycarbonate
Degree of protection (wall mount) IP65
Electrical connection
Ultrasonic transducer cable
RG62-A/U coaxial cable with low
mA output signal 2-core copper conductor, twisted, shielded, 0.5 ... 0.75 mm²
(22 ... 18 AWG), Belden 8760 or equivalent is acceptable
Electrical connection and relay
Copper conductor according to local requirements, rated 250 V 5 A
Synchronization Up to 16 LU01/LU02 units can be synchronized together
Power supply
AC model 100/115/200/230 V AC ± 15%, 50/60 Hz, 31 VA
DC model 18 ... 30 V DC, 25 W
Displays and controls 51 x 127 mm (2 x 5") graphics LCD with backlighting
Memory EEPROM (non-volatile), no backup battery required
Programming Using removable programmer (ordered separately) or Dolphin Plus (option)
Certificates and approvals CE, CSAUS/C, FM, ATEX II 3D
Lloyd's register of Shipping (Categories ENV1, ENV2, ENV3 and ENV5)
External temperature sensor TS-3
Communications • SmartLinx: protocol-specific modules as interface for popular industrial fieldbus systems • Dolphin Plus: Siemens Windows-compatible interface and ComVerter link (infrared)



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