Siemens SITRANS LG240 Guided Radar

Key Features of the SITRANS LG240

The LG240 series has several benefits, some of which we have listed for you below:

• Guided wave radar technology
• Measures level, interface, and volume of liquids and solids
• Suitable for hygienic and corrosive applications
• Handles extreme temperatures and pressures
• High accuracy to +/- 2 mm
• Advanced diagnostics for safety
• Simple menu-driven display for easy setup
• Modular design with replaceable probes
• Available in rod and cable versions
• Measures low DK values (≥ 1.6)
• FDA approval available
• Broad application range from storage to extreme pressure/temperature environments
• Auto-learn function for buildup resistance
• Probe end tracking for loss of echo situations
• USB and remote access options for convenience.

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Diverse Applications of the SITRANS LG240

The SITRANS LG240 from Siemens is a versatile guided wave radar transmitter designed for a wide range of applications. It excels in continuous level and interface measurement, particularly in challenging environments such as hygienic and corrosive applications. With the ability to measure very low dielectric constant (DK) values (≥ 1.6) and handle extreme process conditions, the LG240 is ideal for industries that require precise monitoring in aggressive liquids or in processes with high temperatures and pressures. It is well-suited for applications ranging from storage tanks to demanding environments like chemical plants and food production, where hygienic standards are critical. The LG240's advanced diagnostics and ease of maintenance make it a reliable solution for ensuring safety and efficiency in a broad range of level measurement scenarios.

Key Applications:

• Marine Industry
• Hygienic applications (e.g., food and pharmaceutical industries)
• Corrosive liquid environments
• Storage tanks for liquids and solids
• Chemical processing plants
• High-temperature and high-pressure environments
• Aggressive liquid measurement
• Separation and interface measurement processes
• Steam boilers and distillation columns
• LPG gas tanks and other pressurized vessels.

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Easy Configuration and Reliable Operation of the SITRANS LG240

The SITRANS LG240 is designed for continuous level and interface measurement, making it especially suitable for applications in the food processing and pharmaceutical industries. Utilizing high-frequency microwave pulses, this level sensor guides the impulses along a steel cable or rod, which are reflected when they reach the product surface. The time it takes for these pulses to return is then processed by the instrument to calculate and output the level or interface.

For interface measurement, the SITRANS LG240 requires a stable and homogenous upper medium with a known dielectric constant (minimum 1.6), and it must be non-conductive. The lower medium must have a dielectric constant at least 10 times higher than the upper medium, typically electrically conductive. The instrument can also handle applications involving a gas phase and is configured by default for level measurement, with the option to adjust settings for interface measurement. Its precise operation ensures reliable measurement in even complex multi-layered environments.

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Proper Installation Guidelines for the SITRANS LG240

For optimal performance, the SITRANS LG240 should be mounted at least 300 mm (12 in) away from vessel walls or installations, and 500 mm (19.7 in) in non-metallic vessels. The probe must not touch any vessel structures during operation, and in vessels with conical bottoms, centering the sensor ensures measurement close to the lowest point. For non-metallic vessels, a metal sheet or a version with a flange is required to ensure proper signal transmission. Avoid placing the sensor above the filling stream to ensure accurate product surface detection, and follow the specified guidelines for dead zones at the probe's ends for accurate measurements.

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