EH Prosonic FDU91 Ultrasonic Time-of-Flight level and flow sensor for continuous and non-contact measurement (up to 33ft) with FMU9X. 4-wire HART communication. PVDF main wetted parts. G/NPT 1" Process Connection. IP68. ATEX, FM, CSA, INMETRO and IECEx approvals.
Part# with Options:
FDU91-RG1AA
Price with Options:
Please Email us your request for quote
Options:
Approval
(1) Approval for EH FDU90/91/91F/92
Process Connection
(2) Process Connection for EH FDU91/92
Cable Length
(3) Cable Length for EH FDU91/91F/92/93/95
Heater
(4) Heater for EH FDU90/91
Additional Option
(5) Additional Option EH FDU91/92/93/95
Field of application
- Continuous, non-contact level measurement of fluids and bulk material in silos, on belts, stockpiles and in crushers
- Flow measurement in open channels and at weirs
- Maximum measuring range
- FDU90: 3 m (9.8 ft) in fluids. 1.2 m (3.9 ft) in bulk materials
- FDU91/FDU91F: 10 m (33 ft) in fluids. 5 m (16 ft) in bulk materials
- FDU92: 20 m (66 ft) in fluids. 10 m (33 ft) in bulk materials
- FDU93: 25 m (82 ft) in fluids. 15 m (49 ft) in bulk materials
- FDU95: 45 m (148 ft) in bulk materials
- International explosion protection certificates
Benefits
- Integrated temperature sensor for Time-of-Flight correction. Accurate measurements are possible, even if temperature changes are present
- Hermetically welded PVDF sensors FDU91/92 for highest chemical resistance
- Suited for rough ambient conditions thanks to separate installation from the transmitter (up to 300 m (984 ft))
- Reduced build-up formation because of the self-cleaning effect
- Weather resistant and flood-proof (IP68)
- Dust-Ex and Gas-Ex certificates available
Measuring principle
The sensor transmits ultrasonic pulses in the direction of the product surface. There, they are reflected
back and received by the sensor. The transmitter Prosonic S measures the time t between pulse
transmission and reception. From t (and the velocity of sound c) it calculates the distance D from the
reference point to the product surface.