Ultrasonic flow meters
Ultrasonic signals are alternately sent in and against the flow direction. Ultrasonic energy bursts are transmitted and received via well-defined paths across the flow stream. The velocity of the flow is accurately measured by the difference in the arrival times of signals from the upstream and downstream transducers. The transit time difference (Δt = t 2 – t 1) determines the average flow velocity.
| Enclosure | Aluminium housing |
| Dimensions H xW x D | 164 x 148 x 80 mm |
| Protection class | IP 67 |
| Operating temperature range | -20 °C up to +60 °C |
| Outputs | 1 analog output 0/4 – 20 mA / 0 – 10 mA, flow direction is displayed via a separate status output |
| 1 pulse output, 2 open collectors passive 32 VDC | |
| 0-100 Hz 100 mA, 10 – 10.000 Hz 20 mA, optional active, | |
| status output, min./max. alarm, preselection, flow direction, failure alarm, free programmable | |
| Impuls | 1 analog input 4-20 mA |
| Display function | Level, flow, total and status |
| Supply voltage | 92- 275 VC or 9 – 36 VDC |
| Programming | PC with software (password protected), 3 front panel keys |
| Datalogger | 2 MB, programmable time intervals, records available as table |
| Interface | Mini USB IP67, RS232, RS485, ModBus®, RTU, Ethernet |