The FMR52 is a high-performance, non-contact radar level meter utilizing stable 26 GHz high-frequency Pulse Technology. As a superior replacement for ultrasonic level sensors, the FMR52 remains unaffected by air temperature fluctuations, vacuum, or heavy steam, ensuring consistent reliability where traditional ultrasonic technology often fails. Designed for the most demanding industrial applications, it offers an ideal balance of precision, range, and cost-effectiveness for the chemical, oil & gas, and water treatment sectors.
We supply a professional range of Micropilot FMR5x Series solutions:
[FMR51 Radar Level Meter]: The premier choice for standard industrial environments and stable process conditions.
[FMR52 Radar Level Transmitter]: The enhanced version featuring a flush-mounted, PTFE-filled horn antenna specifically for aggressive media.
| Feature | Specification |
| Technology | 26 GHz Pulse Radar |
| Measurement Range | Up to 40 meters (131 ft) / 60m (Optional) |
| Accuracy | $\pm 2$ mm |
| Min. Dielectric Constant | Suitable for media with $\epsilon_r \ge 1.6$ (or $\epsilon_r \ge 1.4$ with stilling well) |
| Process Temperature | -40°C to +200°C |
| Process Pressure | -1 to 40 bar |
| Communication | 4-20mA + HART / Modbus RTU / Profibus |
| Protection Rating | IP66 / IP68 |
| Certifications | ATEX / IECEx Explosion-proof / SIL |
| Antenna Design | Fully PTFE Encapsulated (Flush-mounted) |
The 26 GHz frequency provides a focused signal that is significantly more effective than lower-frequency radars. For systems requiring even higher integration, it pairs perfectly with our [Industrial Pressure Transmitters] to provide comprehensive tank monitoring.
The FMR52 features a completely flush-mounted PTFE antenna. Unlike traditional horn antennas where build-up in the cone causes signal loss or "ghost echoes," this gap-free design is immune to:
Sticky Media: Viscous liquids like resins, syrups, or heavy oils slide off the smooth PTFE surface.
Crystallizing Liquids: In processes involving chemicals that tend to crystallize (like salt solutions or certain acids), the flush design prevents solid deposits from forming on the sensor face. This ensures continuous, maintenance-free operation and eliminates the need for frequent manual cleaning of the antenna.
With no moving parts and a full PTFE cladding, the FMR52 is immune to corrosive wear. This makes it an exceptionally durable choice for aggressive chemicals, reducing the Total Cost of Ownership (TCO).
Equipped with sophisticated algorithms, the FMR52 can effectively filter out false echoes caused by agitators or internal tank structures, providing a clear "envelope curve" for precise level tracking.
Replacing unreliable ultrasonic sensors, the 26 GHz radar excels in:
Open Channels & Pump Stations: Unaffected by air temperature or wind.
Sludge & Clarifier Tanks: High signal stability even with surface turbulence.
Media Compatibility: If your liquid is highly corrosive or requires food-grade hygiene, choose the FMR52 (PTFE Encapsulated). For standard oils or water-based liquids, the FMR51 is the most cost-effective solution.
Mounting Considerations: Ensure the nozzle height does not interfere with the radar beam. For tanks with many internal obstructions, careful positioning is key to maximizing the 26 GHz signal.
Communication: Standard setups use 4-20mA + HART, while complex automation systems benefit from Modbus RTU integration.
Strategic Positioning: Avoid the center of the tank and keep away from the infeed stream to prevent signal noise. Maintain a wall clearance of at least 1/6 of the tank diameter.
The "Nozzle Height Rule": To ensure peak signal integrity, ensure the PTFE antenna head extends at least 10mm below the tank nozzle. This prevents the 26 GHz radar waves from hitting the nozzle wall, which can cause internal reflections and signal interference.
Orientation: The antenna must be mounted perpendicular (90°) to the liquid surface for maximum echo return.
Grounding: Ensure the housing is properly grounded to protect the electronics from electromagnetic fields and static buildup.
| Issue | Potential Cause | Recommended Solution |
| Weak Echo | Heavy foam or low dielectric constant ($\epsilon_r$) | Increase the gain or optimize the mounting position. Consider a stilling well for low $\epsilon_r$ media. |
| Fixed Error | Internal obstruction (pipe/ladder) | Perform a False Echo Suppression (Mapping) via HART to filter out interference. |
| No Output | Power supply failure or incorrect wiring | Verify the loop voltage (typically 24V DC) and check terminal connections. |
| Ringing Effect | Antenna head "buried" inside the nozzle | Verify the Nozzle Height Rule and ensure the antenna tip extends below the nozzle. |
Q1: Why choose 26 GHz over ultrasonic sensors?
A1: Radar is unaffected by air temperature, pressure, or vacuum. It provides consistent accuracy where ultrasonic sensors fail due to environmental changes.
Q2: Is the FMR52 suitable for CIP/SIP cleaning?
A2: Yes. The flush-mounted PTFE antenna is ideal for hygienic applications and can withstand rigorous cleaning cycles.
Q3: Can it measure through a plastic tank lid?
A3: Yes, 26 GHz radar can penetrate certain plastic/non-metallic materials, allowing for measurement without opening the tank.
The FMR52 26 GHz Radar is a versatile and robust solution for the "difficult" side of level measurement. By focusing on chemical resistance and maintenance-free design, Hanyuzl helps industrial users achieve stable, high-precision monitoring.
Explore Our Radar Series:
[Radar Level Meter FMR51] – The industrial standard for general liquid sensing.
[Radar Level Meter FMR52] – The specialist for corrosive and hygienic applications.
The FMR52 26 GHz Radar is a versatile and robust soluti
Quick Selection Checklist for FMR52:
[ ] Is your medium corrosive (Acid/Alkali)?
[ ] Does the process involve heavy steam or surface turbulence?
[ ] Is there limited space at the top of the tank for installation?
[ ] Do you require 2-wire 4-20mA HART integration?
If you checked 2 or more, FMR52 is your ideal solution. [Contact Hanyuzl for a Quote]
