SITRANS Probe LU240 - Ultrasonic Level Transmitter

For liquid inventory, small process vessels, and environmental level measurement. Optional Bluetooth with SITRANS mobile IQ.

The SITRANS Probe LU240 is a compact ultrasonic level transmitter for liquids in small vessels and environmental applications, providing accurate measurements.

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.

SITRANS mobile IQ is a free app that provides easy access to your field devices. Commission, configure, and monitor instrumentation via Bluetooth.

The SITRANS Probe LU240 provides reliable, low-maintenance ultrasonic level measurement for demanding environments. Advanced echo processing, rugged IP68 construction, and flexible power and connectivity options ensure accurate data, easy installation, and lower lifetime costs—helping you maximize uptime and asset efficiency.

Leverage state-of-the-art Process Intelligence echo processing to distinguish true level signals from false echoes, delivering accurate, repeatable measurements with fast response—even in challenging applications.

Eliminate buildup with maintenance-free active face technology and rely on an IP68-rated, fully potted, encapsulated PVDF sensor that withstands corrosion, chemicals, and extreme shock.

Supports battery and solar installations with low startup current and 10.5 V operation, while enabling easy commissioning via HART 7, push-button setup, remote configuration, and optional Bluetooth.

ETFE or PVDF transducers for chemical compatibility

6- and 12-meter versions: 0.15% of range, or 6 mm (0.25 inch) ±2 mm (0.08 inch) for ranges of 4 meters or less; 3-meter version: ±10 mm (0.39 inch)

HART 7; EDD for SIMATIC PDM for remote configuration and diagnostics; FDT such as PACTware or Fieldcare via SITRANS DTM; optional Bluetooth wireless technology with the SITRANS AW050 adapter

The SITRANS Probe LU240 demonstrates why ultrasonic level measurement is not limited by blanking distance. A smart installation utilizes top-of-tank buffer zones, safety point level backup, and proven engineering practices to prevent overflow. The result: reliable, accurate performance in real-world applications.

The SITRANS Probe LU240 integrates seamlessly into Siemens’ integration ecosystem. Commission and configure it via Bluetooth using SITRANS mobile IQ, remotely using the SITRANS LT500 controller, or through SIMATIC PDM. Easily turn level data into actionable insights—from local displays and control rooms to cloud monitoring and digitalization apps.

The SITRANS Probe LU240 is designed to perform in real-world conditions. Its self-cleaning ultrasonic sensor resists buildup, cobwebs, wind, temperature fluctuations, and vibration. With encapsulated electronics and proven Siemens ultrasonic technology, the SITRANS Probe LU240 delivers reliable, accurate level measurement—even in harsh and demanding environments.

The SITRANS Probe LU240 delivers proven ultrasonic accuracy for open-channel measurement applications. Built on decades of Siemens expertise, it provides reliable level data in environmental and water applications. When paired with Siemens controllers and communication options, it supports precise measurement, diagnostics, alarms, and seamless integration—helping to ensure consistent, reliable flow monitoring.

Add Bluetooth wireless connectivity to the SITRANS Probe LU240 using the SITRANS AW050 adapter. Using the SITRANS mobile IQ app on your handheld device, you can commission, monitor, and maintain your ultrasonic level transmitter quickly and safely, with intuitive diagnostics and real-time access, right at your fingertips.

The SITRANS Probe LU240 meets Siemens EcoTech criteria through reduced material use, recyclable packaging, and a long service life. It supports repairability, software and firmware updates, optional Bluetooth upgrades, and low-maintenance operation, helping to reduce environmental impact while enabling reliable performance throughout its lifecycle. Read the Siemens EcoTech profile for the SITRANS LU240 here.

When you unbox the SITRANS Probe LU240, you’ll find an easy-to-install ultrasonic level transmitter designed for quick setup. The packaging is compact, protective, and clearly labeled, with helpful instructions included on the product itself. You’ll also find guidance for a short demo to get you up and running quickly—making installation, configuration, and initial measurements straightforward right from the start.

SITRANS IQ Guard provides advanced diagnostics, trend logging, and alerts, helping users monitor tank levels, filling rates, and unusual behavior. This combination helps optimize material usage, prevent overfills or product loss, reduce downtime, and support smarter, data-driven decisions across operations. Read more here.

A properly engineered level measurement system should also include a level switch for alarm or backup purposes. Typically used for high-level overfill prevention and/or low-level dry-run protection, these safeguards help ensure safe operation and process reliability.

Supplementary components are designed to work in conjunction with most types of instrumentation to enhance functionality, such as by enabling remote displays and remote monitoring solutions. They help expand system visibility and accessibility.

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