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Uson-21 Ex Ultrasonic Level Transmitter

Uson-21 Ex Ultrasonic Level Transmitter

 Certified for high level of Flameproof Enclosure explosion protection: Ex d II C T6 Gb.

 With three measurement for selection, including 5 meters, 10 meters and 15 meters.

 With temperature compensation function, offers high accuracy and strong adaptability.

 With RS-485 communication interface.

 Special echo signal processing algorism is used, effectively avoids false echo signal.

 With IP66/IP67 Ingress protection rating.

 Probe made of corrosion-resistant PVDF, suitable for corrosive liquid or applications under corrosive environment.

 High cost-effective ratio and low maintenance cost.

 EMC design of the product complies with IEC61000-4 (GB/T 17626.2) standard in EFT (LT: A), ESD (LT: A) and surge.


  • Uson-21 Ex Ultrasonic Level Transmitter is designed with a flameproof enclosure. It is certified for Flameproof Enclosure (Ex d II C T6 Gb) explosion protection by the National Explosion-proof Product Quality Supervision and Inspection Center. It works on the same principle as Uson-11. But Uson-21 is suitable not only for general working conditions, but also for explosion hazardous environment.


  • Uson-21 works on the same principle as Uson-11. Transducer (probe) sends out high frequency ultrasonic pulses. When a pulse hits liquid surface, it is reflected back. The reflected wave is received by the transducer and converted into an electronic signal. The ultrasonic pulse travels at velocity of sound wave, and the time interval between transmitted ultrasonic pulse and received ultrasonic pulse is directly proportional to the distance between transducer and liquid surface. The relationship between distance S, sound speed C and time interval T can be expressed by a formula: S=C×T/2.
  •  Certified for high level of Flameproof Enclosure explosion protection: Ex d II C T6 Gb.

     With three measurement for selection, including 5 meters, 10 meters and 15 meters.

     With temperature compensation function, offers high accuracy and strong adaptability.

     With RS-485 communication interface.

     Special echo signal processing algorism is used, effectively avoids false echo signal.

     With IP66/IP67 Ingress protection rating.

     Probe made of corrosion-resistant PVDF, suitable for corrosive liquid or applications under corrosive environment.

     High cost-effective ratio and low maintenance cost.

     EMC design of the product complies with IEC61000-4 (GB/T 17626.2) standard in EFT (LT: A), ESD (LT: A) and surge.

  • Measurement range

    5m, 10m, 15m

    Transducer

    Standard:ABS

    Anti-corrosion:PVDF

    Dead zone

    ≤0.3m (for 5m/10m measurement range)

    ≤0.6m (for 15m measurement range)

    Resolution

    ±0.5% of the measurement range

    Beam angle

    6° for 5m measurement range

    8° for 10m measurement range

    10° for 15m measurement range

    Accuracy

    ≤1%

    Display

    LCD

    Buttons

    Three

    Power supply

    85~240V AC 50/60Hz

    18~30V DC

    Signal output

    Two-wire 4~20mA

    Four-wire 4~20mA

    Optional:RS485/Relay output

    Relay contact rating

    4A 250V AC/30V DC

    Ambient temperature

    -20~60℃

    Process temperature

    -20~80℃

    Process pressure

    Normal

    Cable entry

    M20x1.5

    External housing

    Aluminum alloy

    Process fitting

    Thread

    Flange

    Ingress protection level

    IP66/IP67

    Explosion proof certificate

    Flameproof Enclosure: Ex d IIC T6 Gb

  •  Ideal solution for open tank/pool where the atmosphere contains explosive gas.
     Level measurement for applications under corrosive environment where the atmosphere contains explosive gas as well, such as urban drainage pumping station, sump pit/collecting well, biochemical reaction pool and sedimentation tank etc.


  • Uson-21 Ex Ultrasonic Level Transmitter
  • Uson-21 Ex Ultrasonic Level Transmitter
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