| measuring principle | evaluation of transition times of ultrasonic pulses dependant on direction and subsequent calculation of flow speed |
| measuring path | 1.2 - 25 m |
| orientation of measuring path | 30 - 60°C to tunnel axis, typically 45° |
| measuring range | -40 to 40 m/s any interval can be assigned to analog output default: 0-20 m/s |
| response time | > 1s … 180s, programmable |
| resolution | 0,1 m/s, accuracy depends on: installation, path length, flow profile, typ. < +- 0,2m/s bei 3m/s |
