Product Overview

SITRANS Probe LU Ultrasonic level transmitter: continuous, non-contact, up to 12m (40 ft) range. Monitors level and volume in liquids and slurries. 2-wire loop powered ultrasonic transmitter for level, volume and flow monitoring of liquids in storage vessels and simple process vessels, as well as in open channels. Ideal for level monitoring in water, wastewater, and chemical storage applications.

Key Features

Measurement Technology:

• Ultrasonic Sensing: Non-contact ultrasonic level measurement
• 12 Meter Range: Up to 12 meters (40 feet) measuring range
• Continuous Monitoring: Real-time level and volume monitoring
• High Accuracy: Reliable and repeatable measurement performance

Communication:

• 4-20mA Output: Standard analog output with HART protocol
• HART Communication: Digital communication overlay on 4-20mA signal
• 2-Wire Loop Powered: Simplified installation with single cable connection
• Optional PROFIBUS PA: Digital fieldbus communication capability

Construction:

• PBT Enclosure: Robust plastic (PBT) housing for industrial environments
• PVDF Transducer: PVDF copolymer transducer material for chemical resistance
• IP65 Protection: Sealed enclosure for harsh environments
• Dual Cable Entry: 2 x M20 cable glands included

Technical Specifications

Measurement Performance:

• Measuring Range: Up to 12 meters (40 feet)
• Accuracy: ±0.25% of span (typical)
• Resolution: 1 mm (0.04 inch)
• Response Time: Adjustable from 1 to 99 seconds
• Temperature Compensation: Automatic temperature compensation

Electrical Specifications:

• Power Supply: 2-wire loop powered, 15-30 VDC
• Current Consumption: 3.6 mA (quiescent)
• Output Signal: 4-20 mA with HART protocol
• Load Resistance: 0-750 Ohms at 24 VDC
• Isolation: 500 VAC for 1 minute

Physical Characteristics:

• Enclosure Material: PBT plastic
• Process Connection: R 2" (BSPT), EN 10226
• Cable Entry: 2 x M20 with cable glands
• Transducer Material: PVDF copolymer
• Net Weight: 2.2 kg

Environmental Specifications:

• Operating Temperature: -40°C to +70°C (-40°F to +158°F)
• Storage Temperature: -40°C to +80°C (-40°F to +176°F)
• Humidity: 0-95% RH non-condensing
• Protection Rating: IP65 (NEMA 4X)

Approvals and Certifications:

• General Purpose: FM, CSA, CE, UKCA, RCM, KC
• Hazardous Area: Available with intrinsically safe versions
• EMC: EN 61326-1 Class B
• Safety: IEC 61010-1

Standards and Compliance:

• RoHS Compliance: Yes, since 10.01.2003
• WEEE Take-Back Obligation: Yes
• Export Control: ECCN: EAR99I / AL: N
• Country of Origin: Canada

Product Information:

• EAN: 4019169847278
• Net Weight: 2.2 kg
• Packaging Dimensions: 193.00 x 247.00 x 156.00 mm
• Packaging Quantity: 1 piece

Applications

The SITRANS Probe LU is ideal for:

• Water and Wastewater: Level monitoring in treatment plants and storage tanks
• Chemical Storage: Level measurement in chemical storage vessels
• Process Vessels: Simple process vessel level monitoring
• Open Channels: Flow monitoring in open channel applications
• Storage Tanks: Inventory management in storage facilities
• Pump Control: Automatic pump start/stop control
• Overflow Protection: High-level alarm and protection systems

Installation and Configuration

Installation Benefits:

• Simple Installation: 2-wire connection simplifies wiring
• Non-Contact Measurement: No contact with process medium
• Flexible Mounting: Multiple mounting options available
• Easy Commissioning: Simple setup and configuration

Configuration Options:

• Infrared Programmer: Intrinsically safe handheld programmer
• HART Communicator: Standard HART communication tools
• SIMATIC PDM: Process device manager integration
• Local Display: Optional local display available

System Integration

Communication Options:

• 4-20mA/HART: Standard analog output with digital overlay
• PROFIBUS PA: Optional digital fieldbus communication
• Control Systems: Integration with PLC and DCS systems
• SCADA Systems: Remote monitoring and control capability

Accessories:

• Mounting Hardware: Various mounting brackets and fittings
• Cable Glands: Additional cable entry options
• Surge Protection: Lightning and surge protection devices
• Display Units: Local and remote display options

Advantages

Measurement Benefits:

• Non-Contact Operation: No wear parts or maintenance
• Wide Range: Up to 12 meters measuring range
• Chemical Compatibility: PVDF transducer resists most chemicals
• Temperature Stable: Automatic temperature compensation

Installation Advantages:

• 2-Wire Technology: Simplified wiring and installation
• Loop Powered: No separate power supply required
• Flexible Configuration: Multiple setup options available
• Robust Construction: Suitable for harsh industrial environments

Operational Benefits:

• Reliable Performance: Proven ultrasonic technology
• Low Maintenance: No moving parts or wear components
• Cost Effective: Reduces installation and maintenance costs
• Versatile Applications: Suitable for various liquid types

Important Product Notice

Product Status: This product is discontinued and no longer available for new orders. The product is in the final year of support phase.

Successor Product: SITRANS Probe LU240 (7ML51 series) is the recommended replacement with enhanced features and performance.

Support: For assistance with replacements or technical support, please contact your local Siemens office.

REACH Compliance

Currently, there is no information on SVHC (Substances of Very High Concern) from the supply chain. Products are regularly compared with the REACH candidate list, and information will be updated as new findings become available.

Download existing graphical data for this product:

• Product Information and Technical Data
• SITRANS Probe LU Manual
• Product Datasheet
• Technical Support Forum
• Replacement Product Information