Siemens Radar Level Transmitter 7ML5221-1DA11

Product Description

It operates at 25 GHz and offers a measuring range of up to 20 meters (66 feet), making it suitable for a wide variety of applications including chemical, petrochemical, and water treatment. The device features a compact design with a PEEK or PTFE antenna, ensuring compatibility with corrosive media and high-temperature processes up to 200°C (392°F). The 7ML5221-1DA11 variant is configured with a 4-20 mA HART output, enabling easy integration into existing control systems. It supports a wide supply voltage range of 18-33 V DC and provides high accuracy of ±2 mm, ensuring reliable and precise level measurement. The transmitter is certified for hazardous areas, including ATEX and IECEx approvals, making it safe for use in explosive environments. With its user-friendly local display and intuitive setup via SIMATIC PDM or HART handheld communicators, the SITRANS LR250 simplifies commissioning and maintenance. The device is built to withstand harsh industrial conditions, featuring robust construction and advanced echo processing algorithms that filter out false echoes from agitators and other obstructions. This makes the Siemens 7ML5221-1DA11 a dependable choice for demanding level measurement tasks. The Siemens 7ML5221-1DA11 is a SITRANS LR250 radar level transmitter designed for continuous level measurement of liquids and slurries in process industries.

Basic Product Information

• Measuring range up to 20 m (66 ft)
• 4-20 mA with HART protocol output
• Accuracy ±2 mm for reliable readings
• PEEK or PTFE antenna for chemical compatibility
• Hazardous area approvals (ATEX, IECEx)
• Local display with intuitive menu navigation
• Advanced echo processing for false echo suppression
• 25 GHz high-frequency radar for precise measurement

Technical Specifications

Version & Model Difference

The Siemens 7ML5221-1DA11 is part of the SITRANS LR250 family. The ordering code 7ML5221-1DA11 specifies a particular configuration: it includes a PEEK antenna (suitable for high temperatures), a 4-20 mA HART output, and a 1-1/2" BSP process connection. Other variants may have different antenna materials (e.g., PTFE), different process connections (e.g., NPT, flanged), or different output protocols (e.g., PROFIBUS PA, FOUNDATION Fieldbus). The '1DA11' suffix indicates the standard version with no special options. For applications requiring higher pressure ratings or different approvals, other model numbers within the LR250 series should be selected.

Application Scenarios