High-frequency level sensor RFLS-28

Reliable Limit Level Detection for Industrial Liquids and Pastes

The RFLS-28 High-Frequency Level Sensor is designed for accurate limit level detection of liquids, viscous fluids, and paste-like materials in industrial processes. Using high-frequency measurement technology, the sensor ensures stable operation even in applications where buildup, foam, or sticky materials typically cause problems for conventional level sensors.

This sensor is ideal for monitoring level limits in tanks, pipes, vessels, filling stations, and containers, helping operators maintain safe and efficient process control.

High-Frequency Technology with Buildup and Foam Elimination

The RFLS-28 operates in the high-frequency band, allowing it to reliably detect the presence of media while eliminating false signals caused by foam or deposits on the sensing electrode. This makes it suitable for demanding applications involving viscous or adhesive materials.

The sensor suppresses the influence of buildup from substances such as:

• Ketchup

• Yogurt

• Syrups and jams

• Creams and soaps

• Detergents and chemicals

This ensures accurate switching signals even in environments where traditional capacitive or vibrating level sensors may fail.

Ideal Replacement for Vibrating Level Sensors

Thanks to its advanced sensing principle, the RFLS-28 can serve as a direct replacement for vibrating level sensors or conventional capacitive level sensors in more demanding industrial environments.

The sensor works with conductive and non-conductive materials and can detect substances with a relative permittivity as low as εr ≥ 1.5, providing flexibility for a wide range of process media.

Unique “Medium Window” Material Recognition

One of the most advanced features of the RFLS-28 is the “Medium Window” function, which enables selective detection of a specific medium.

This intelligent recognition system allows the sensor to identify materials based on their dielectric properties. For example, the sensor can:

• Distinguish oil from water or air

• Detect foam while ignoring the liquid beneath it

• Sense only a selected material while ignoring others

This feature significantly improves reliability in complex process environments.

Easy Installation and Configuration

The RFLS-28 can be mounted directly into tank walls, pipes, funnels, and vessels where level detection is required. It supports multiple threaded and clamp process connections, making integration into existing systems straightforward.

Configuration is quick and simple using a magnetic pen, allowing adjustments without opening the device housing.

Durable Stainless Steel Construction

The sensor is built with a robust stainless steel housing (AISI 316L) for high corrosion resistance and long service life. The sensing electrode is available with protective coatings such as PEEK or PTFE, ensuring compatibility with aggressive chemicals and industrial fluids.

Different versions are available for standard industrial environments as well as hazardous areas requiring intrinsically safe operation.