7ML5221-1BA11

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The Siemens 7ML5221-1BA11 is a sophisticated ultrasonic sensor designed for precise level measurement in storage tanks. This device offers continuous, non-contact monitoring of levels and volumes in both liquids and slurries, making it an essential tool for various industrial applications. With a measurement range of up to 12 meters (40 feet), it ensures accurate readings even in challenging environments. The sensor features a durable plastic (PBT) enclosure with a 2" NPT process connection, and it supports 4-20mA and HART communication protocols. Certified for use in ordinary locations, it meets FM, CCSAUS, CE, UKCA, RCM, and KC standards, ensuring reliable performance across diverse settings.
Specification Description
Part Number 7ML5221-1BA11
Manufacturer Siemens
Part Category Ultrasonic Sensor
Part Family SITRANS Probe LU
Display Type LCD Display
Measurement Range Up to 12 meters (40 feet)
Application Monitors level and volume in liquids and slurries
Communication 4-20mA, HART
Enclosure Material Plastic (PBT)
Cable Inlet 2 x M20 (includes 1 general purpose cable gland)
Transducer Material PVDF Copolymer
Process Connection 2" NPT (Taper), ANSI/ASME B1.20.1
Approvals Ordinary Locations/General Purpose (Non-Ex), FM, CCSAUS, CE, UKCA, RCM, KC
Additional Features Optional PROFIBUS PA
Replacement Option Consider replacing with SITRANS Probe LU240 7ML51
Description The Siemens 7ML5221-1BA11 is a robust ultrasonic sensor designed for precise level and volume monitoring in various liquid and slurry applications. With a measurement range of up to 12 meters, it offers reliable performance in industrial environments. The device features a durable plastic enclosure and supports communication via 4-20mA and HART protocols, ensuring seamless integration into existing systems. Its PVDF copolymer transducer and 2" NPT process connection make it suitable for a wide range of installations. This sensor is ideal for industries requiring accurate and continuous level measurement.

What is the function of this Siemens ultrasonic sensor?

The Siemens ultrasonic sensor is designed for continuous, non-contact level measurement in storage tanks. It can monitor the level and volume of liquids and slurries up to a range of 12 meters (40 feet).

What are the key features of this ultrasonic sensor?

Key features include a 6-meter (20-foot) range, PVDF copolymer transducer material, 4-20mA and HART communication output, and compatibility with various approvals such as FM, CCSAUS, CE, UKCA, RCM, and KC.

What type of process connection does this sensor use?

This sensor uses a 2" NPT (Taper), ANSI/ASME B1.20.1 process connection, which is standard for many industrial applications.

Is this sensor suitable for hazardous locations?

The Siemens 7ML5221-1BA11 is approved for ordinary locations and general-purpose (non-explosive) environments.

What materials are used in the construction of this sensor?

The sensor features a plastic (PBT) enclosure with a PVDF copolymer transducer, ensuring durability and resistance to various chemicals.

Can this sensor be integrated with PROFIBUS PA?

Yes, the Siemens ultrasonic sensor offers optional integration with PROFIBUS PA for enhanced communication capabilities.

What is the recommended replacement for this sensor?

As this product is in phase-out, Siemens recommends considering the SITRANS Probe LU240 as a replacement option.

  • Monitoring liquid levels in storage tanks
  • Measuring volume in slurry applications
  • Continuous level measurement in industrial processes
  • Non-contact level detection in chemical processing
  • Level monitoring in water treatment facilities
  • Integration with process control systems via HART communication
  • Use in ordinary locations and general-purpose environments

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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