Endress+Hauser Ultrasonic measurement Time-of-Flight Prosonic FDU95
007110-HW-ENDRESS-010
Overview
The FDU95 delivers reliable, maintenance-free ultrasonic level measurement for coarse and powdery bulk solids with long measuring ranges up to 45m and robust performance in harsh and hazardous environments.
Measuring principle
Ultrasonic
Characteristic / Application
Separated version with field housing or top hat rail housing for control cabinet instrumentation, 300 m in-between sensor and transmitter
Supply / Communication
4-wire (HART, PROFIBUS DP)
Accuracy
+/- 2 mm + 0.17% of measured distance
Ambient temperature
-40 °C...80 °C
or 150 °C,
(-40 °F...176 °F
or 302 °F)
Process temperature
-40 °C...80 °C
or 150 °C,
(-40 °F...176 °F
or 302 °F)
Process pressure / max. overpressure limit
0.7 bar...1.5 bar abs
(10 psi...22 psi)
Main wetted parts
UP (unsaturated polyester)
Process connection
G / NPT 1"
Blocking distance
0.7 m / 80 °C,
(2.3 ft / 176 °F),
0.9 m / 150 °C,
(2.9 ft / 302 °F)
Max. measurement distance
45 m (148 ft)
Communication
Transmitter:
4...20 mA HART
PROFIBUS DP
Certificates / Approvals
ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI,UK Ex
Options
Second 4...20 mA output
Components
Transmitter:
FMU90, FMU95
Engineered for demanding bulk material applications, the FDU95 ensures stable non-contact level monitoring unaffected by dielectric properties, density, or humidity. With long-range capability, rugged IP68 protection, and temperature-resistant construction up to 150°C, it excels in silos, crushers, stockpiles, and conveyors. Integrated temperature compensation enhances accuracy, while optional Dust-Ex and Gas-Ex approvals ensure safe use in explosive atmospheres. Automatic detection with FMU90/FMU95 transmitters and a self-cleaning sensor design simplify commissioning and minimize maintenance requirements.