7ML5221-1AB11

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Overview of Siemens 7ML5221-1AB11 SITRANS Probe LU Ultrasonic Level Transmitter

The Siemens 7ML5221-1AB11 SITRANS Probe LU is a continuous, non-contact ultrasonic level transmitter designed for measuring level and volume in liquids and slurries. It offers reliable measurement up to 12 meters (40 feet) using advanced Sonic Intelligence signal processing. This model supports communication via 4-20 mA/HART and optional PROFIBUS PA protocols for flexible integration into process control systems.

Key Features of Siemens 7ML5221-1AB11 Ultrasonic Level Transmitter

  • Non-contact ultrasonic measurement up to 12 meters – Prevents wear and contamination for long-term reliability.
  • Patented Sonic Intelligence® signal processing – Enhances signal-to-noise ratio and reduces false echoes.
  • Auto False-Echo Suppression – Mitigates false signals caused by fixed obstructions in vessels.
  • Flexible communication – Supports analog 4-20 mA, HART, and PROFIBUS PA protocols.
  • Wide range of process connections – Available in 2" NPT, BSPT, BSPP, and flange options.
  • Chemical resistant transducers – ETFE or PVDF materials for various process conditions.
  • Integrated LCD display and bargraph – Facilitates easy configuration and local monitoring.

Technical Specs

Specification Details
Model Number 7ML5221-1AB11
Measurement Range 0.25 to 12 meters (10" to 40')
Frequency 54 kHz
Output 4-20 mA with HART and optional PROFIBUS PA
Process Connection 2" NPT (taper), BSPT, BSPP, or flange
Transducer Material ETFE or PVDF
Operating Temperature -40°C to +85°C (-40°F to +185°F)
Enclosure IP67 / NEMA 4X
Display LCD with bargraph
Weight Approx. 2.2 kg (4.6 lbs)

Applications / Use Case

The Siemens SITRANS Probe LU 7ML5221-1AB11 is widely used for continuous level and volume measurement in tanks, open channels, and vessels containing liquids and slurries. Typical industries include water and wastewater treatment, chemical processing, and food manufacturing.

Siemens supports this product with warranty and technical assistance for reliable performance in critical applications.

7ML5221-1AB11

$0.00

  • ACHIEVING

    4.0

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    95%

    positive reviews

  • LESS THAN

    1%

    return rate

Does it come with a warranty?

Yes, All products are offered wth 1-Year warranty.

What is the condition of the product?

All products sold are New & Unused.

How fast is shipping?

All products are delivered within 2-8 business days depending on our stock location.

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