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 |
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| 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 |
