SITRANS LT500 controller for level, flow, pump applications

SITRANS LT500 is an advanced level, flow, and pump controller that works with radar and ultrasonic transmitters and any 2-wire 4–20 mA device, offering multiple options.

• Measurement types : Level, distance, space, volume, differential, average, head and Open Channel Flow
• Measuring range : Sensor-based with SITRANS LR110/LR120 and SITRANS Probe LU240, and ultrasonic transducers
• Communications : Up to three 4 to 20 mA outputs
• Fieldbus option cards : EtherNet IP, HART, Modbus RTU, Modbus TCP, PROFIBUS DP, PROFIBUS PA, or PROFINET options
• Outputs : 2 x 4 … 20 mA, + 1 x 4-20 mA output with HART card, 6 x relay and fieldbus

SITRANS LR100 Series — compact 80 GHz radar transmitters for liquid or solid level measurement, featuring Bluetooth for quick setup and a narrow beam.

Compact, cost-effective ultrasonic level transmitter for liquids and small vessels, and environmental measurement, with optional Bluetooth for easy diagnostics.

SITRANS LT500 is the next evolution of level and pump controllers for radar and ultrasonic transmitters, transducers, or any 2-wire 4-20 mA device. With applications ranging from basic level measurement to complex pumping routines, it optimizes operations and delivers significant cost savings through intelligent level and pump control. The SITRANS LT500 controller offers:

Quickly commission using intuitive Quick Start Wizards, multiple display views and flexible configuration tools. Six fully programmable relays streamline pump control, alarming and overall setup, saving time and effort.

Ensure precise measurement for liquids or solids using SITRANS LR110/120 radar, Probe LU240 and ultrasonic transducers, or mA inputs to meet a wide range of application needs.

Improve process performance with datalogging, parameter backup and easy configuration transfers. Access immediate status and diagnostics through digital-ready Ethernet/IP, HART, Modbus, PROFIBUS or PROFINET for smarter operations.

Level, distance, space, volume, differential, average, head and Open Channel Flow

Sensor-based with SITRANS LR110/LR120 and SITRANS Probe LU240, and ultrasonic transducers

Up to three 4 to 20 mA outputs and multiple fieldbus option cards

2 x 4-20 mA,+ 1 x 4-20 mA output with HART card,6 x relay, fieldbus

40+ years of controller experience backed by more than 170 years of Siemens’ innovative engineering experience and millions of installed process instruments in the field.

Controlling your application keeps you operating within local legislation. From basic level control to complex pumping routines, protect the environment while keeping accurate records of your process.

Schedule pumps before high-demand periods and save money. Connectivity and reliable level measurement reduce CO2 emissions. Programmable features – grease ring reduction, pump runtime and alternating pumps – reduce maintenance.

Reduce personnel access to vessel tops or confined spaces. High-level alarms and backup level override help prevent overflow of hazardous materials. Put safety first with simple push-button configuration from the controller.

Digitalization ready for connection to the cloud, IIoT or networks using standard industry protocols and onboard datalogging for events, totalizers, pumps and more. Everything at your fingertips or just a touch away.

Save time with continuous ultrasonic sludge monitoring that replaces manual checks. Act faster with real-time visibility into sludge blanket changes and optimize performance using accurate data to improve pumping decisions.

SITRANS LT500 and SITRANS LR110 provide pump control for irrigation systems while reducing costs through close water-level monitoring. Installation is simple with easy commissioning, requiring no instrumentation experience.

SITRANS LT500 and SITRANS LR120 activate shaker screens based on rock height in the crusher. Bluetooth access enables fast commissioning and monitoring, and the SITRANS mobile IQ app provides clear performance readings.

SITRANS LT500 meets Siemens EcoTech standards by minimizing environmental impact across its entire lifecycle. It combines the functions of two devices into one, reducing material use by 50% and using packaging that is 100% paper-based and more than 25% lighter and 65% smaller than previous designs. SITRANS LT500 is built in facilities powered by 100% renewable electricity and offers exceptionally long service life, with an MTBF over 450 years. Customers benefit from repairability, upgradability and ongoing firmware support, enabling long-term value and reduced waste. Read more about the SITRANS LT500 EcoTech profile .

Watch the video to discover how the EcoTech label supports environmental responsibility, longterm reliability, and total lifecycle efficiency. It explains how features like reduced material use, recyclable packaging, renewable-powered manufacturing and long-lasting design make SITRANS LT500 a sustainable choice for process industries.

You can access a dedicated video library featuring expert-led training and real-world application examples for SITRANS LT500. This collection includes step-by-step technical walkthroughs, detailed feature explanations from the product manager and short instructional clips designed to help you get the most from your level, flow and pump controller. Whether you’re looking to simplify commissioning, explore advanced functions or see practical use cases in action, the video library provides everything you need to build confidence and maximize performance with SITRANS LT500. Find the library here .

SITRANS IQ Guard enhances the SITRANS LT500 by adding powerful real-time diagnostics, predictive maintenance alerts and detailed data analysis that help operators prevent downtime and optimize system performance. When combined, SITRANS LT500’s advanced level and pump control capabilities work seamlessly with SITRANS IQ Guard’s 200+ precision diagnostics, automated alerts and in-depth trend logging. This enables operators to detect issues earlier, reduce manual inspections and make smarter decisions that improve reliability and lower maintenance costs. Read the full article to learn more about how SITRANS IQ Guard elevates industrial monitoring.

SITRANS LT500 enables wastewater treatment plants to significantly reduce operating costs by optimizing pump run times and shifting pumping to off-peak electricity hours. By intelligently controlling single or multiple pumps based on level conditions, SITRANS LT500 helps plants avoid high electricity rates during afternoon and evening peak periods. In a real-world example, switching to off-peak pumping saved more than $527 per wet well and over $58,000 annually across 110 stations. SITRANS LT500’s advanced features — including dual-point level measurement, 6 relays and compatibility with radar, ultrasonic and 4–20 mA devices — give operators precise control and real-time insight. Its built-in edge computing also processes data locally, improving system reliability even in low-connectivity environments. Read the full article to learn how SITRANS LT500 boosts efficiency and ROI.

SITRANS LT500 enhances industrial process monitoring by combining precise level control with advanced edge computing and IoT connectivity. Acting as a local microcontroller, SITRANS LT500 processes data at the source, reducing latency, easing the load on the main PLC and enabling reliable operation even when network connectivity is limited. It can route data to the control room or directly to the cloud via gateways using Modbus or HART, enabling access to powerful analytics, custom apps and remote monitoring tools. With seamless integration to devices like the SITRANS Probe LU240 and Siemens cloud applications, SITRANS LT500 supports predictive maintenance, inventory management, buildup detection and smart data visualization. This makes it an ideal solution for facilities looking to streamline operations, boost efficiency and accelerate digitalization. Read more here .

SITRANS LT500 enhances safety and operational reliability by supporting dual-technology level monitoring, allowing operators to use two different sensor types — such as radar and ultrasonic — within the same controller. This built-in redundancy allows continuous measurement even if one sensor is affected by challenging conditions like foam, dust or turbulence. SITRANS LT500 seamlessly integrates a wide range of level devices, including ultrasonic, radar, pressure, guided wave radar and capacitance sensors, providing a failsafe system ideal for critical industrial applications. By combining a primary “smart” device with a secondary backup signal, SITRANS LT500 minimizes downtime, reduces manual intervention and delivers accurate, dependable monitoring across industries requiring the highest level of safety. Read more here .

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