Siemens 7ML5422-3AA30 SITRANS LR200 Radar Level Transmitter 7ML54223AA30

• Extended Product  Type: Level Transmitter
• Product ID: 7ML5422-3AA30
• ABB Type Designation: Pressure Transmitter

Description of Siemens 7ML5422-3AA30 SITRANS LR200 Radar Level Transmitter

The Siemens 7ML5422-3AA30 SITRANS LR200 is a high-performance, non-contact radar level transmitter designed for continuous level measurement of liquids and slurries in industrial environments. Utilizing advanced 2-wire, 6 GHz pulse radar technology, the SITRANS LR200 delivers precise and reliable measurements even under challenging conditions such as vapor, temperature fluctuations, and varying process pressures.

Engineered for simplicity and durability, the LR200 is ideal for chemical storage tanks, water treatment facilities, and general process industries. Its robust enclosure and intuitive setup interface enable fast commissioning and minimal maintenance. With high signal sensitivity and intelligent echo processing, this radar transmitter ensures accurate level detection even in narrow tanks or installations with internal obstructions.

The device supports seamless integration with modern automation systems through standard analog outputs, making it a dependable solution for real-time monitoring and process optimization. Its non-contact measurement principle eliminates wear and reduces lifecycle costs, positioning it as a preferred choice for industrial level measurement applications.

Technical Specifications of Siemens 7ML5422-3AA30 Radar Level Transmitter

Parameter	Specification
Model Number	7ML5422-3AA30
Product Series	SITRANS LR200
Measurement Principle	Non-contact radar (pulse radar, 6 GHz)
Measuring Range	Up to 20 m (66 ft)
Accuracy	±3 mm (0.12 inch)
Output Signal	4–20 mA (2-wire), HART communication
Frequency	6 GHz
Process Temperature	-40°C to +80°C (-40°F to +176°F)
Process Pressure	Up to 3 bar (43.5 psi)
Wetted Parts	Antenna material: PVDF or polypropylene
Enclosure Rating	IP66 / IP67 (NEMA 4X)
Power Supply	24 V DC (loop-powered)
Mounting	Threaded or flanged process connection
Programming	Local display or remote via HART
Hazardous Area Approval	Available (depending on configuration)

Key Features of Siemens 7ML5422-3AA30 Radar Level Transmitter

• Non-contact radar technology eliminates wear and maintenance
• High measurement accuracy (±3 mm) for critical level monitoring
• Reliable performance in harsh conditions (vapors, turbulence, temperature changes)
• 2-wire loop-powered design reduces installation complexity
• Advanced echo processing algorithms for superior signal reliability
• Compact and robust housing with IP66/IP67 protection
• Supports HART communication for easy integration and diagnostics
• Quick setup and commissioning with user-friendly interface
• Suitable for narrow tanks and vessels with internal obstructions

Applications of Siemens 7ML5422-3AA30 Radar Level Transmitter

The SITRANS LR200 radar level transmitter is widely used across multiple industries due to its versatility and reliability:

• Water & Wastewater Treatment – tank level monitoring, lift stations, chemical dosing
• Chemical Processing – storage tanks, aggressive liquids, process vessels
• Oil & Gas (non-custody transfer) – tank level measurement
• Food & Beverage – liquid storage and processing tanks
• Power Generation – cooling water systems and auxiliary tanks
• General Manufacturing – bulk liquid storage and process control

Siemens SITRANS LR200, radar level transmitter, non-contact level sensor, industrial level measurement, 7ML5422-3AA30, liquid level monitoring, radar level sensor for tanks, 2-wire radar transmitter

Frequently Asked Questions (FAQ)

1. What makes the SITRANS LR200 different from ultrasonic level transmitters?
Radar technology used in the SITRANS LR200 is not affected by temperature, pressure, or vapors, unlike ultrasonic sensors, making it more reliable in harsh industrial environments.

2. Can the SITRANS LR200 be used in narrow tanks?
Yes, its 6 GHz radar frequency and focused beam allow accurate measurements even in narrow or obstructed vessels.

3. Is this transmitter suitable for corrosive liquids?
Yes, with appropriate antenna material (such as PVDF), it can handle a wide range of aggressive chemicals.

4. What type of output signal does it provide?
It provides a standard 4–20 mA analog signal with HART communication for diagnostics and configuration.

5. Does it require regular maintenance?
No, as a non-contact radar device, it has no moving parts and requires minimal maintenance.

6. Can it be used outdoors?
Yes, the IP66/IP67 (NEMA 4X) rated enclosure ensures reliable operation in outdoor and harsh environments.

7. What industries commonly use this device?
It is commonly used in water treatment, chemical processing, food & beverage, power plants, and general industrial applications.