Ultrasonic non-contact level measurement of liquids, pastes andbulk solids

Prosonic T FMU30

11-35 Pcs.


* *
  • Quick and simple commissioning via menu-guided onsite operation with four-line plain text display
  • Envelope curves on the on-site display for simple diagnosis
  • Linearisation function (up to 32 points) for conversion into any unit of length, volume or flow rate
  • System integration via 4-20mA

Maximum measuring

range in fluids:

8 m

Maximum measuring

range in bulk materials:

3.5 m

Blocking distance:

≥0.25 m

Typical measuring error:
3 mm or 0.2 % of
measuring distance

Product/VersionPrice/pcs. in NZ$Order code
Prosonic T FMU30
ApprovalDisplaySensor; max.range1 to 34 to 1011 to 35
Non-hazardous areaDisplay; Operating1-1/2"; 5m liquid/ 2m solid; 0.25m1000.-930.-880.-FMU30-AAHEAAGGF
2"; 8m liquid/ 3.5m solid; 0.35m1100.-1023.-968.-FMU30-AAHEABGHF

Prices are net, ex store Auckland, GST additional and valid until 30/9/2016.
EMC's standard Terms and Conditions of Supply are applicable.


Prosonic T FMU30 is a compact transmitter for continuous, non-contact
level measurement in simple applications. It can be used in fluids,
pastes, sullages and coarse bulk materials. FMU30 is not suited for
liquids with foam at the surface.


The sensor of the instrument transmits ultrasonic pulses
in the direction of the product surface. There, they are reflected back and
received by the sensor. The instrument measures the time between pulse
transmission and reception. The instrument uses the time (and the
velocity of sound) to calculate the distance between the sensor
membrane and the product surface.

Application example

a) Venting hole

Level measurement in a pump shaft

Technical data

  • Max. range fluids
Sensor 1": 5 m
Sensor 2": 8 m

  • Max. range bulk
Sensor 1": 2 m
Sensor 2": 3,5 m
  • Operating frequency
Sensor 1": approx. 70 kHz
Sensor 2": approx. 50 kHz
  • Pulse frequency
Max. 0.5 Hz
  • Emitting angle α
  • Blocking distance
Sensor 1": 0.25 m
Sensor 2": 0.35 m
  • Output signal

4 to 20 mA

  • Signal on alarm

Selectable, according to NAMUR NE43

  • Output damping

Freely selectable, 0 to 255 s

  • Linearization

Up to 32 value pairs

Power supply
  • Supply voltage
14 to 35 V DC (protective circuitry against
reverse polarity is built into the device)
  • Power consumption

51 to 800 mW

  • Cable gland

M20 1.5 (recommended cable diameter
6 to 10 mm)

Performance characteristics

  • Reference operating

Temperature = +20 C;
Pressure = 1013 mbar abs;
Humidity = 50 %;
Ideal reflective surface (e.g. calm, smooth
fluid surface)

  • Typical measuring

3 mm or 0.2 % of measuring

  • Measured value

1 mm

Operating conditions
  • Ambient temperature

-20 to +60 C

  • Storage temperature

-40 to +80 C

  • Process temperature

-20 to +60 C

  • Process pressure

0.7 to 3 bar abs.

  • Ingress protection

IP 66/68

  • Climate class

DIN EN 60068-2-38 (Test Z/AD) DIN/IEC
68 T2-30Db

  • Vibration resistance
DIN EN 60068-2-64 / IEC 68-2-64:
20 to 2000 Hz, 1 (m/s)/Hz; 3 100 min
  • Electromagnetic
compatibility (EMC)

according to all relevant requirements of the
EN 61326 series


  • Sensor


  • Sealing


  • Housing

PBT-FR (cover PBT/PA)

Housing design

  • Type of housing

F16 plastic housing

  • Cover

Plastic cover
- For version without on-site display (low, grey)
- For version with on-site display (high, transparent)


  • Display and operating
menu-guided on-site operation with
four-line plain text display with envelope

Dimensions in mm

a) Sensor 1"

b) Sensor 2"

Installation according to instruction manual.

Electrical connection

a) Terminals
b) Optional: display
c) Internal earth terminal
d) External earth terminal

e) Power

f) Plant ground

Technical Datasheet