Open Channel / River Flow Meter

We have four ultrasonic open channel flow and velocity meters suitable for a wide range of liquids.
The comparison chart below provides a quick overview on the capabilities for each model to assist with product selection. Please select the appropriate product and then follow the link to the product page for further information.

Feature UF 811 CO UF 821 CO UF 831 CO MiniSonic Speed
UF 811 CO UF 821 CO UF 831 CO Minisonic speed
Maximum River Width (meters) 300 500 50
Maximum Channel Width (meters) 30 30 30 50
Suitable for partially full pipes YES YES YES YES
Number of chords (max.) 2 4 8 2
Number of Level inputs (max) 1 2 4 0
Calculates flow from velocity and level. YES YES YES NO
Number of channels measured (max) 2 4 8 1
Accuracy up to 0.5% up to 0.5% up to 0.5% up to 0.5%
Resolution 0.1 ns 0.1 ns 0.1 ns 0.1 ns
Repeatability up to 0.1% up to 0.1% up to 0.1% up to 0.1%
Flow Range 1 mm/s to 45 m/s 1 mm/s to 45 m/s 1 mm/s to 45 m/s 1 mm/s to 45 m/s
Echo visualization YES YES YES YES
Internal Data logger YES YES YES NO
Serial Communication RS232 OR RS485 RS232 OR RS485 RS232 OR RS485 RS232 OR RS485
Analogue/relay outputs YES (Option) YES (Option) YES (Option) YES
Power Supply 10 – 32 V DC 10 – 32 V DC / 110 -240 V AC ‘9-36 V DC / 90 -240V AC ‘9 – 36 V DC
(Option: 90 – 230 V AC)
IP 67 67 67 67
Temperature (°C) -20 / 60 -20 / 60 -10 / 50 0 / 50
EXPLOSION PROOF NO NO NO NO