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ULM-11A1 Level Transmitter

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A noncontact radar level transmitter ULM-11A1 aims to resolve common process tasks of level measurement in various tanks containing liquids or loose materials. No contact between the ULM-11A1 level transmitter and the product to be measured makes this instrument perfect for level measurement of most explosive, food, and high-viscosity products, either neutral or aggressive. It combines an optimal price, high reliability, and measurement accuracy.

Explosion-proof design – 1ExdIIBT6.


Technologies. ULM-11A1 level transmitter as well as ULM-11 and ULM-31А1 level transmitters use an original technology of adaptive FMCW-system tuning; therefore the ULM-11A1 level transmitter is equally reliable in level measurement both for liquids and various loose materials. The used technologies ensure maximum sensitivity in level measurement of various products.

Applications. The ULM-11A1 level transmitter is used to measure the level of acid (sulphuric, hydrochloric, nitric, hydrofluoric, etc.), alkalis, water, various solutions, chemicals, petroleum, dark and light oil products, mazut, bitumen, alcohol, gas condensate, cement, ore, crushed stone, sand, coal, coal dust, chips, wood sander dust, soot (carbon black), etc.

Unified design. The ULM-11A1 level transmitter has a unified structural design. The ULM-11A1 level transmitter has the same mounting dimensions as all other ULM series level transmitters.

Compatibility. The ULM-11A1 level transmitter is fully compatible with all other ULM series level transmitters both by their protocol and electrical connection. This allows the Customer to build a level measuring system on the enterprise's tank farm with the best price/quality ratio. Depending on the required measurement accuracy, each specific tank can use different level transmitters. Herewith, all level transmitters are connected to a single information line and work with the same top-level software, which eventually enables the Customer to obtain the best optimal price/quality ratio of the level measuring system.

  • Explosion-proof design
  • Reliable level measurement of liquids and loose materials
  • Noncontact level measurement of aggressive products
  • Optimal price/measurement accuracy ratio
  • Available version for level measurement in tank trucks
  • Available version for level measurement in guide pipes

Maximum absolute level measurement error


Measuring beam width


Level-measurement range

0.6 ÷ 30m

Operating ambient temperature at the level-transmitter installation place

-60 to +500C, no heating case required

Temperature of the monitored product

Not limited

Supply voltage

Either 24V DC or 220V 50Hz


Explosion-proof, 1ExdIIBT6

Digital interface

RS485, Modbus

Analogue output


Technical Information

Operation Manual. ULM-11 and ULM-11A1 Level Transmitters

Technical Description of the ULM4.01.000-01 Level Sensor



Certificate of Registration in the State Register of Measuring Instruments

Certificate of Conformity