Siemens 7ML5221-1BC11 SITRANS Probe LU Ultrasonic Level Transmitter

Description

The 7ML5221-1BC11 is a SITRANS Probe LU ultrasonic level transmitter engineered for continuous, non-contact level and volume monitoring of liquids and slurries. This device offers a measurement range of up to 6 meters (20 ft) and utilizes an advanced echo processing algorithm to ensure reliable performance in diverse industrial environments. Equipped with a 4-20 mA HART communication output, it allows for easy integration into existing control systems and remote monitoring architectures. The transmitter features a durable PVDF copolymer transducer and a G 2" (BSPP) process connection, making it suitable for a wide range of vessel types and process conditions.

Features

• Technology: Ultrasonic non-contact measurement for level and volume.
• Measurement Range: Up to 6 meters (20 ft).
• Output: 4-20 mA with HART communication.
• Transducer Material: PVDF copolymer (chemical resistant).
• Process Connection: G 2" (BSPP), EN ISO 228-1.
• Enclosure: Plastic (PBT) with 2 x M20 cable inlets.
• Certifications: General purpose, FM, CSA, CE, C-TICK, KCC.

Applications

• Liquid level monitoring in storage tanks and process vessels.
• Slurry level measurement in industrial waste or mining applications.
• Volume calculation for chemical storage.
• Wastewater and utility monitoring.

Technical Specifications

Installation Guidelines

• Mounting: Install the transmitter in a vertical position, ensuring the transducer face is clear of any obstructions such as agitators, fill pipes, or tank walls that could cause false echoes.
• Environment: Avoid mounting the unit in areas with heavy turbulence or excessive foaming on the liquid surface, as these conditions can impede ultrasonic wave propagation.
• Wiring: Use shielded, twisted-pair cabling for the 4-20 mA HART loop to prevent electromagnetic interference. Ensure all cable glands are tightened securely to maintain the integrity of the enclosure.
• Configuration: Utilize the HART protocol to configure parameters such as tank dimensions, material type, and damping constants during the initial commissioning phase.
• Maintenance: Periodically inspect the transducer face for buildup; clean using non-abrasive materials to ensure signal accuracy.