Endress+Hauser Micropilot FMR20 Compact Radar Level Transmitter

Overview

The Endress+Hauser Micropilot FMR20 is a compact 26 GHz non-contact radar level transmitter purpose-built for continuous liquid level measurement in water, wastewater, and general utility applications across all industries. Thanks to a proprietary radar chip design that integrates the radio-frequency components directly onto a single board, the Micropilot FMR20 achieves one of the smallest footprints in its class, making it the natural choice for pump stations, lift stations, and storage tanks where panel and nozzle space is limited. The instrument outputs a 2-wire, 4 to 20 mA HART signal and measures level with an accuracy of ±2mm across ranges up to 20 metres, independent of medium density, viscosity, or conductivity, since the sensor never touches the process fluid.

As the official authorized partner and exclusive regional representative for Endress+Hauser, Seven Star LLC proudly supplies the Endress+Hauser Micropilot FMR20 to water utilities, municipalities, and industrial facilities throughout Oman and the wider GCC. Every unit shipped from our Muscat-based instrumentation division is genuine factory stock, backed by full manufacturer warranty, application support, and access to Endress+Hauser’s calibration and commissioning services – a level of assurance unmatched by grey-market resellers operating in the region.

Measurement Principle

The Micropilot FMR20 operates on the time-of-flight principle of pulse radar. A short 26 GHz microwave pulse is emitted from the antenna toward the liquid surface; the wave travels at the speed of light, reflects off the surface, and returns to the sensor – the core working principle behind every Endress+Hauser FMR20 installation. The transmitter’s onboard electronics precisely measure the elapsed transit time and convert it into a distance value, from which the empty space and, by subtraction from the tank height, the liquid level are derived. Because the calculation depends only on the speed of light and elapsed time, the measurement is unaffected by changes in vapor pressure, temperature gradients, density, or turbulence at the liquid surface, conditions that routinely degrade the accuracy of hydrostatic or ultrasonic alternatives.

With a 12° beam angle from its compact horn-style antenna, the FMR20 focuses its energy tightly enough to avoid interference from tank walls, ladders, and agitators in most standard vessels. Because the antenna never contacts the process medium, there is no moving mechanism to foul, no seal to wear, and no pressure drop introduced into the process, which translates directly into lower maintenance visits and a longer service interval for utilities operating remote lift stations across Oman’s interior and coastal governorates.

Engineering Design of the Endress+Hauser Micropilot FMR20

The FMR20 is built around a chemically resistant PVDF housing and antenna assembly, rated IP66/IP68 and NEMA 4X/6P for outdoor and submersible installation in open channels, wet wells, and sumps. The compact, low-profile enclosure accommodates thread connections from G1″/NPT1″ up to G2″/NPT2″, along with UNI slip flange options from DN80 to DN150 (3″ to 6″), giving specifying engineers flexibility when retrofitting existing nozzles on legacy tanks with an Endress+Hauser FMR20.

Commissioning is carried out either over the HART loop with a standard communicator or wirelessly through the SmartBlue app via Bluetooth®, which displays the live echo curve on any Android or iOS device, dramatically simplifying setup for technicians working at height or in confined-space wet wells. A 32-point linearization table is stored in the transmitter for direct volume or flow readout in irregular tanks and open channels, and an optional remote display (FHX50) can be fitted where the primary housing is not readily accessible for local readout.

Key Features

The Endress+Hauser FMR20 combines a compact form factor with the accuracy and reliability engineers expect from Endress+Hauser radar technology.

• The Endress+Hauser FMR20 uses non-contact 26 GHz pulse radar measurement eliminates moving parts and process contact, removing routine maintenance associated with mechanical level devices.
• Measuring accuracy of ±2mm across ranges to 20 metres supports both simple level indication and precision inventory or flow-linearized applications.
• Bluetooth® commissioning via the SmartBlue app allows technicians to configure and view the echo curve directly from a smartphone without opening the housing.
• On the Endress+Hauser FMR20, chemically resistant PVDF wetted parts and antenna withstand aggressive water, wastewater, and chemical dosing environments.
• IP66/IP68 and NEMA 4X/6P ingress protection permits installation in flooded wet wells, open channels, and outdoor tank farms without additional enclosures.
• Compact radar chip design integrates RF components onto a single board, giving the FMR20 one of the smallest footprints available in a 26 GHz radar transmitter.
• The Endress+Hauser FMR20 2-wire loop-powered 4 to 20 mA HART output integrates directly into existing PLC, SCADA, and DCS infrastructure with no additional signal conditioning.
• 32-point linearization table enables direct volume, flow, or open-channel readout for irregularly shaped tanks and channels.

Industrial Applications

The Endress+Hauser FMR20 radar level transmitter is widely specified across municipal and industrial water infrastructure, including raw and treated water storage tanks, wastewater lift and pump stations, stormwater retention basins, and sewer network monitoring points. The Endress+Hauser FMR20 compact housing makes it especially well suited to confined manholes and package pump stations, where larger radar transmitters simply do not fit, and its chemical resistance supports use in dosing tanks and chemical storage across desalination and utility plants.

As the officially authorized partner for Endress+Hauser, Seven Star LLC distributes the Micropilot FMR20 to water authorities, EPC contractors, and industrial end users throughout Oman, including projects around Muscat, the Sohar and Salalah economic zones, and inland municipal networks, as well as broader GCC markets in the UAE, Saudi Arabia, Qatar, Bahrain, and Kuwait. Regional warehouse stock and local application engineering support allow project teams to specify the Endress+Hauser FMR20 with confidence that lead times and after-sales service will match the pace of Gulf infrastructure schedules.

Technical Specifications

The table below summarizes the core specifications of the Endress+Hauser FMR20 relevant to sizing and installation planning.

Request a Quote for Endress+Hauser Micropilot FMR20 Compact Radar Level Transmitter

Facility engineers and procurement teams across Oman and the GCC can request a formal RFQ for the Endress+Hauser FMR20 directly from Seven Star LLC, with regional warehouse stock available for rapid dispatch and full technical datasheets provided on request. As the authorized partner for Endress+Hauser in Oman and the GCC, our instrumentation division supports specification, sizing, and commissioning of every Endress+Hauser FMR20 from initial inquiry through installation, backed by genuine manufacturer warranty and local technical support. Contact Seven Star LLC today to receive a formal quotation for your project.

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