Product Short Description
Product Name: Prosonic FMU30 Ultrasonic Level Transmitter (solids version)
Product Overview: The FMU30-10A10 is a two-wire compact ultrasonic transmitter from the Prosonic FMU30 series, engineered for continuous non-contact level measurement of bulk solids in silos and containers. It delivers a 10 m measuring range, a 4–20 mA analog output with HART communication, and a 2″ NPT process connection.
Description
Technical Specifications:
- Measuring Principle: Ultrasonic (non-contact)
- Measuring Range: 0.7 to 10.0 m (2″ sensor)
- Blind Distance: 0.35 m (1.15 ft) for 2″ connection
- Beam Angle: 10°
- Accuracy: ±3 mm or ±0.2% of set range
- Output Signal: 4–20 mA with HART
- Power Supply: 10.5–42 V DC (loop-powered, two-wire)
- Process Connection: 2″ NPT
- Sensor Material: PVDF
- Enclosure Rating: IP66 / IP68 (submersible)
- Ambient / Process Temperature: –40 to 80 °C
- Process Pressure: 0.7 to 3 bar abs (10 to 44 psi)
- Electrical Connection: ½” NPT conduit
- Certifications: CE, ATEX, IECEx, FM, CSA; SIL 2 capable
Key Features: Non-contact measurement immune to dust and abrasive materials; advanced echo-processing for reliable reading despite dust or product angle; HART for remote configuration, calibration and diagnostics; submersible IP68 housing for harsh industrial environments; hazardous-area approvals for explosive atmospheres; commissioning via local display or PC software.
Working Principle: The transmitter emits ultrasonic pulses toward the material surface. The time-of-flight for the echo to return is measured and converted into a distance/level value, which is transmitted as a 4–20 mA signal with HART digital overlay.
Application Scenarios: Continuous level measurement of powders, grains, pellets and other bulk solids in silos; inventory management in food, chemical, plastics and mining industries; level monitoring in hoppers and bins; measurement under dusty or humid conditions.
Installation Requirements: Mount vertically above the material surface avoiding obstructions in the acoustic path; respect the 0.35 m blind distance; use 2″ NPT process opening; route the ½” NPT conduit for electrical connection; ensure loop supply is within 10.5–42 V DC.
Usage Notes: Keep the sensor face clean; avoid foam, heavy turbulence or fast fill/discharge rates (FMU42 or FMU90+FDU9x are recommended for those conditions); verify ATEX/IECEx rating matches the specific hazardous-zone requirement before installation.
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