Fluvius TT

Fluvius TT ECM-IE – Ultrasonic Multi-Path Flowmeter

The Fluvius TT ECM- IE is an 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 levels of suspended solids. Specially configured acoustic signals are transmitted through the water from one transducer to another. 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 frequency related. The higher the frequency, the more the damping occurs. For wider distances we use low frequencies as they allow for a considerably better signal at the receiving transducer.

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
Datalogger internal,
sampling interval user selectable
Communications RS-232, MODBUS, Ethernet, USB
Inputs max. 8 x 4-20 mA
Outputs 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
Enclosure Steel, wall mounted

suitable for outside installation

Dimensions 400x500x160mm (WxHxD)


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)
Dimensions Ø 368 mm,

Height 121 mm

Ø 183 mm,

Height 142 mm

Ø 340 mm,

Height 170 mm

Weight  40 kg  8 kg  –
Rivers Thumb