Non-Contact 80GHz FMCW Radar: Designed for tall solid silos up to 125m.
Severe Dust & High Temp Protection: PTFE Drip-off antenna & purge connection (-40 to 450°C).
High Precision & Safety: ±3mm accuracy, SIL2/SIL3 certified with Heartbeat Technology.
Wireless Operation: SmartBlue App Bluetooth commissioning in Ex-zones without hot-work permits.
The Endress+Hauser Micropilot FMR67B is a new-generation 80GHz W-band non-contact radar level transmitter engineered for extremely tall bulk solid silos (up to 125 m / 410 ft), heavy dust concentration, and high-temperature process conditions (-40 to +450 °C, vacuum to 160 bar).
Plant engineers managing raw material storage routinely face severe mechanical failures and process interruptions. The FMR67B directly addresses these field hazards:
Process Hazard: Guided wave radar cables in 80m cement silos suffer extreme tensile loads from collapsing solids, snapping cables and wrecking discharge valves.
FMR67B Fix: Non-contact 80GHz free-space radar eliminates physical probe strain, removing mechanical breakage risks completely.
Process Hazard: Steep repose angles in sloped material piles scatter wide 26GHz radar beams, causing complete signal loss and pump dry-running.
FMR67B Fix: An integrated swiveling alignment flange paired with a 3° narrow beam locks directly onto angled material surfaces.
Process Hazard: Thick dust crusting over conventional horn antennas creates false high-level alarms, causing unneeded overfill shutdowns.
FMR67B Fix: Convex PTFE Drip-off / Flush antenna sheds particulate buildup, supported by continuous compressed air purging.
| Specification Parameter | Engineering Rating Value | Operational & Maintenance Benefit |
|---|---|---|
| Operating Frequency | W-Band (~80 GHz) FMCW Radar | Ultra-narrow beam angle penetrates extreme airborne dust clouds |
| Max Measuring Distance | Up to 125 m (410 ft) | Suited for ultra-tall clinker silos, blast furnace hoppers, & grain bins |
| Measurement Accuracy | ±3 mm (0.12 in) | Eliminates volumetric discrepancies in high-value bulk solids inventory |
| Process Temperature | -40 to +450 °C (-40 to +842 °F) | Handles glowing coal ash, hot clinker, and extreme thermal cycling |
| Process Pressure (Abs.) | Vacuum to 160 bar (2,320.6 psi) | Withstands violent pneumatic conveyance pressure surges without seal rupture |
| Wetted Materials | 316L, Al⅔O– Ceramic, Graphite, PTFE | NACE MR0175 compliant; resists abrasive media erosion and chemical corrosion |
| Antenna Configurations | 2" Drip-off PTFE / 3" Flush PTFE / 2.6" Horn 316L | Selectable geometries tailored for sticky powders or highly abrasive rocks |
| Digital Communication | 4-20mA HART, PROFIBUS PA, PROFINET with Ethernet-APL, Bluetooth® | High-speed IIoT fieldbus integration into DCS / PLC plant architectures |
| Data Memory & Diagnostics | HistoROM memory module, Heartbeat Verification | Stores historical event logs & enables fast transmitter replacement without recalibration |
| Safety & Ex Approvals | SIL2 / SIL3 (IEC 61508), ATEX, IECEx, NEPSI Ex, CSA, UK Ex | Certified for combustible dust hazard Zone 20/21 and Safety Instrumented Systems |
| Comparison Criteria | Micropilot FMR67B (80GHz FMCW) | Legacy 26GHz Pulse Radar |
|---|---|---|
| Signal Beam Width | Ultra-Narrow (approx. 3°–4°): Concentrated energy misses internal struts, wall buildup, and ladders easily. | Wide Beam (10°–15°): Scatters against silo internals, generating massive false interference echoes. |
| Dust & Material Buildup | Drip-off PTFE / Air Purge: Sheds fine dust coatings; active purging prevents antenna face plugging. | Open Horn Cavity: Fine dust packs tightly inside horn cavity, completely dampening radar signals. |
| Nozzle Mount Tolerance | High Mounting Flexibility: Emits cleanly through long, narrow vessel nozzles without internal ringing. | Strict Nozzle Limits: Antenna must extend fully past nozzle bottom to avoid severe false reflections. |
A: The FMR67B utilizes an 80GHz short-wavelength signal combined with a PTFE Drip-off antenna geometry that discourages dust accumulation. Integrated air purge connections can be connected to continuous plant air to actively blow away sticky particulate matter from the antenna face.
A: Using the SmartBlue app on any smartphone or tablet, engineers can configure parameters and view real-time envelope curves from up to 10 meters away. This eliminates the need to open housing covers in ATEX/NEPSI Ex Zone 20/21 hazardous environments or apply for hot-work permits.
A: Yes. Heartbeat Technology provides onboard diagnostics and in-situ verification according to IEC 61508 without interrupting the process. A wizard-guided proof test can be executed remotely, generating an automatically documented test report for compliance.
Our certified instrumentation engineers provide 24-hour model code verification, customized process flange matching, and rapid factory quotations.
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