Flow Star Engineering Private Limited

FERF-200 MODEL

Flowstar make RF level switch is an industrial device designed for reliable level measurement and control in bins, silos, and vessels containing solids, slurries, or liquids, regardless of whether they are conductive or non-conductive. It operates on the radio frequency (RF) admittance principle and is especially useful in environments with challenging process conditions like coating, ratholing, mechanical damage, or high temperatures.

 Working Principle and Construction

• The core components of the Flowstar RF level switch (FERF 200 series) are a sensing probe and a remote electronic controller.
• The probe contains two sections: an active section and a shield section, insulated from each other, with no electronics or moving parts inside the probe itself.
• The electronics (controller) are housed separately in a dust- and weather-proof enclosure and connect to the probe via a coaxial cable. This setup enhances reliability in harsh environments and eliminates issues from coating or mechanical stresses.
• The device works by transmitting low-power RF signals to both probe sections, comparing changes in the material around the probe to determine the presence or absence of material at the measured level.
• The switch output is typically a relay (SPST or DPDT type), used for alarms or controls.

Applications and Features

• Typical applications include coal-based thermal power plants, where it helps detect levels in challenging bulk material handling scenarios.
• It is unaffected by dense suspended particles, high temperature, and coatings from process material. Installation is straightforward and damage risk is minimized due to robust probe design.
• Input power options include 24VDC, 110/220VAC, and other custom requirements. The relay output can be used for further automation, alarms, or interlocks.
• Sensing range can be tailored from small 200mm probes up to 40 meters for large silos.

 Product Specifications

Key Advantages

• Immune to coating and suspended dust in process vessels.
• High temperature adaptability.
• Minimal mechanical damage risk.
• Suitable for conductive/non-conductive, granular, or liquid media.
• Fail-safe design and straightforward calibration.

The Flowstar RF level switch represents a highly robust and adaptable solution for level measurement challenges in demanding process environments.