Ultrasonic measurement - Prosonic FDU91

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
(-40 °F ... 176 °F)

Process temperature

-40 °C ... 80 °C
(-40 °F ... 176 °F)

Process pressure / max. overpressure limit

0.7 bar ... 4 bar abs
(10 psi ... 58 psi)

Main wetted parts

PVDF (fully welded IP68 / NEMA6P)

Process connection

G / NPT 1"

Blocking distance

0.3 m (1 ft)

Max. measurement distance

Liquids: 10 m (33 ft),
Solids: 5 m (16 ft)

Communication

Transmitter:
4 ... 20 mA HART
Profibus DP

Certificates / Approvals

ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI, EAC Ex

Options

Second 4...20 mA output

Components

Transmitter:
FMU90, FMU95

Application limits

Foam / high turbulence possible:
FDU92
Flange-flush assembly:
FDU91F
For tank farms scanner:
FMU95

Measuring Principle	Ultrasonic
Product headline	Version with separate transmitter in field housing or top hat rail housing Cost effective solution for open channel flow measurement in water / wastewater plants
Max. measurement error	accuracy: distance measurement: +/- 2mm + 0.17% resolution: distance measurement: 1mm
Measuring range	max measuring distance up to 10m / 32ft
Max. process pressure	atm.
Medium temperature range	-40...80°C (-40...176°F)
Degree of protection	IP68
Display/Operation	Transmitter
Outputs	Transmitter: 4...20mA HART Option: second 4...20mA output
Inputs	Transmitter
Digital communication	HART, PROFIBUS DP
Hazardous area approvals	ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI, EAC Ex