SIEMENS 7ML5221-2AA11 Central control module

SIEMENS 7ML5221-2AA11 Overview

The SIEMENS 7ML5221-2AA11 is a 2-wire radar level transmitter from the SITRANS LR250 series. It is designed for continuous, non-contact level measurement in a wide range of liquid and slurry applications.

Product Detailed Description

• Function:

• Continuous, non-contact level measurement.

• Suitable for various liquids and slurries.

• 2-wire technology simplifies power and signal connections.

• Measurement via radar technology, unaffected by process conditions such as temperature, pressure, vapor, or dust.

• Configurable measuring range and output signal.

• Features:

• 25 GHz pulse radar technology.

• Measuring range up to 20 meters (65.6 ft).

• High accuracy and reliability.

• Easy to install and commission.

• Intrinsically safe (Ex ia) approval for hazardous areas.

• HART communication protocol for configuration and diagnostics.

• Optional flange or threaded connections.

• Plastic (PBT) or aluminum enclosure.

Product Parameters

• Measuring Principle:

• Pulse radar, 25 GHz.

• Measuring Range:

• 0.25 m to 20 m (0.8 ft to 65.6 ft).

• Process Connection:

• Flange: DN 80 / 3" to DN 150 / 6", ASME 3" to 6".

• Thread: 1 1/2" NPT or G 1 1/2".

• Process Temperature:

• -40 °C to +80 °C (-40 °F to +176 °F).

• Process Pressure:

• -1 bar to +3 bar (-14.5 psi to +43.5 psi).

• Accuracy:

• ±2 mm (±0.08 inch).

• Output Signal:

• 4 mA to 20 mA HART (2-wire).

• Power Supply:

• 2-wire, voltage range 19 V DC to 30 V DC depending on load resistance.

• Enclosure:

• Plastic (PBT) or aluminum.

• Degree of Protection:

• IP67.

• Explosion Protection:

• Intrinsically safe (Ex ia IIC T6 Ga).

• Communication Protocol:

• HART.

Product Advantages

• Non-Contact Measurement:

• No contact with the medium, avoiding mechanical wear and corrosion issues.

• Unaffected by Process Conditions:

• Insensitive to changes in temperature, pressure, vapor, dust, and dielectric constant.

• High Accuracy and Reliability:

• Provides accurate and consistent level measurements.

• Easy Installation and Commissioning:

• 2-wire connection and HART communication simplify installation and configuration.

• Suitable for Hazardous Areas:

• Intrinsically safe approval allows use in potentially explosive environments.

• Low Maintenance Costs:

• Non-contact measurement reduces maintenance requirements.

• Wide Range of Applications:

• Suitable for measuring various liquids and slurries.

Precautions

• Correct Installation:

• Follow Siemens' installation guidelines, ensuring the sensor is mounted in the correct position and orientation.

• Process Connection:

• Select the correct process connection type and size appropriate for the application.

• Environmental Conditions:

• Ensure the operating environment meets the sensor's temperature and pressure specifications.

• Media Properties:

• While radar is generally insensitive to most media, extreme foam or severe surface agitation may affect measurement accuracy.

• HART Communication:

• A compatible HART communication device or software is required for configuration or diagnostics.

• Explosion Protection Requirements:

• When used in hazardous areas, all relevant explosion protection safety regulations and installation requirements must be followed.

Product Applications

• Chemical Industry:

• Storage tank level measurement, reactor level control.

• Oil and Gas Industry:

• Level monitoring in storage tanks, separators, surge tanks.

• Water and Wastewater Treatment:

• Level measurement in basins, water tanks, sedimentation tanks.

• Food and Beverage Industry:

• Level control in storage tanks.

• Pharmaceutical Industry:

• Level monitoring in storage tanks.

• Bulk Solids Handling:

• Applicable in some slurry applications.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapor

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