Fluvius TT

Fluvius TT ECM-IE - Ultrasonic multi-path flowmeter  

Open channel flowmeter for discharge measurement in rivers and open channels. The range of application for Fluvius TT transit-time ultrasonic flowmeter runs from small waterways to huge river systems with high suspended solids. By means of acoustic transmission a coded signal is sent through the water and the transit time and flow rate is calculated providing the speed of river flow. When an acoustic wave propagates in water, part of the energy is damped by friction and suspended solids. This procedure is frequencyrelated. The higher the frequency, the bigger the damping. For wider distances we use low frequencies as they allow for a considerably better receiver signal.



FLUVIUS TT ultrasonic flowmeter  


  Acoustic Paths  

1 – 8, length 1 – 1000 m

  Range   ± 20 m/s, bi-directional
  Frequency   15, 28, 100 and 200 kHz
  Accuracy   ± 2% (typical)
  Display   4 lines, 20 characters

sampling interval user selectable

  Communications   RS-232, MODBUS, Ethernet, USB
  Inputs   max. 8 x 4-20 mA

max. 4 x 4-20 mA

2 x Relay, 2 x Pulse

  Power Supply  

85-264 VAC (50-60 Hz)
or 12 VDC

  Battery Backup   integrated, 2 Ah

Steel, wall mounted

suitable for outside installation


400x500x160mm (WxHxD)




    PDF-Logo brochure for Rivers / PDF (905 KB)



TD-200/18, TD-200/8, TD-200/18-ATEX

    Transducers for Fluvius TT ultrasonic multipath flowmeter











Frequency   15 kHz   28 kHz   200 kHz
Beam Width    17° (-3dB)   18° (-3dB)   5° (-3dB)

Ø 368 mm,

Height 121 mm


Ø 183 mm,

Height 142 mm


Ø 340 mm,

Height 170 mm

Weight    40 kg    8 kg    –


Flow Measurement in natural Rivers