Next-generation 80GHz W-band radar level transmitter for bulk solids, powders, and granules in narrow tall silos.
We provide original factory-new stock, EN 10204-3.1 material certificates, and 24-hour global dispatch support.
In tall, narrow silos containing grain, plastic pellets, or cement, legacy 26GHz radar transmitters project a wide signal cone that reflects off corrugated metal walls, internal ladder rungs, or steep material repose angles (Angle of Repose). These wall reflections trigger false high-level alarms, forcing plant operators to shut down pneumatic filling systems prematurely. Micropilot FMR66B addresses these operational hazards directly:
This specification matrix outlines the physical, thermal, pressure, and electrical boundaries required by instrumentation engineers during FMR66B solids level radar selection.
| Engineering Parameter | FMR66B Factory Value | Field Application Boundary |
|---|---|---|
| Measuring Principle | Non-Contact Radar (80GHz W-band FMCW) | Optimized for continuous level measurement of bulk solids and powders |
| Measurement Accuracy | ±3 mm (0.12 in) | Prevents material inventory accounting discrepancies in bulk storage |
| Process Temperature Range | -40 to +130 °C (-40 to +266 °F) | Covers standard ambient powder silos and drying hoppers |
| Process Pressure Limit | Vacuum to 16 bar (232 psi) | Suitable for pressurized pneumatic conveying receiving hoppers |
| Max Measuring Range | Up to 50 m (164 ft) | Maintains strong signal return across tall grain, sand, or cement silos |
| Min. Dielectric Constant (DK / εr) | DK ≥ 1.6 | For DK < 1.6 or extremely low-density powders, switch to FMR67B |
| Antenna & Wetted Materials | 1-1/2" PVDF encapsulated or 2" PTFE drip-off | Fully complies with FDA 21 CFR and EU 1935/2004 food contact standards |
| Purge & Alignment Options | Integrated compressed air purge connection & swivel flange alignment | Allows precise aiming toward material discharge cone in sloped silos |
| Process Connections | Thread: G1-1/2", MNPT1-1/2" Flange: UNI DN80...DN150 / Mounting Bracket |
Flexible adaptation to flat or sloped silo roofs |
| Output & Digital Protocols | 4–20 mA HART, PROFIBUS PA, PROFINET (Ethernet-APL), Bluetooth SmartBlue | Enables seamless data integration into PLC / DCS plant control systems |
| Safety & Marine Approvals | SIL2 / SIL3 (IEC 61508), Ex (ATEX, IECEx, NEPSI, CSA), Marine (ABS, LR, BV, DNV) | Includes HistoROM memory for fast replacement without re-calibration |
Selecting between Micropilot FMR66B and heavy-duty FMR67B depends on process temperature, abrasive wear conditions, and media dielectric constant (DK). Use this comparison matrix to select the right model without over-budgeting.
| Selection Factor | Micropilot FMR66B (Basic Solids) | Micropilot FMR67B (Severe Solids) |
|---|---|---|
| Primary Application Area | Grain, sugar, flour, cement, sand, plastic pellets | Abrasive ores, high-temp fly ash, extreme clinker silos |
| Max Process Temperature | +130 °C (+266 °F) | Up to +450 °C (+842 °F) |
| Dielectric Limit (DK / εr) | DK ≥ 1.6 | DK ≥ 1.1 (Extremely loose / low-density powders) |
| Air Purging & Alignment | Standard integrated air purge | Heavy-duty air purge & 3D alignment sensor |
| Max Measuring Distance | 50 m (164 ft) | Up to 125 m (410 ft) |
A: Yes. FMR66B is rated for bulk solids with a dielectric constant (DK) ≥ 1.6. For extremely loose, low-density powders with DK < 1.6 or extremely steep repose angles in 100m silos, we recommend choosing the higher-sensitivity Micropilot FMR67B.
A: FMR66B operates on the 80GHz W-band FMCW principle, which inherently features superior dust penetration compared to optical or ultrasonic sensors. In addition, its PVDF encapsulated and PTFE drip-off antennas naturally shed fine dust particles, preventing signal attenuation.
A: FMR66B supports 4–20 mA HART, PROFIBUS PA, and PROFINET with APL (Advanced Physical Layer). It also includes wireless Bluetooth parameterization using the SmartBlue App for quick mobile commissioning without special handheld tools.
Need immediate stock availability, process connection sizing, or SIL verification documentation for FMR66B? Contact our application engineers today for factory-direct quotes and technical support.
