Considered the market leader in Doppler technology, Polysonics  has continuously forged ahead in the utilization of fast microprocessors. This has increased the success rate of applying Doppler technology to areas which were previously considered unsuitable.

The signal is sent by the transmit transducer into the flow and reflected off of entrained gas or solids back to the receive transducer. Once the transmission frequency is received, it is digitized and passed through a Fast Fourier Transform (FFT). This information is then statistically analyzed to provide the mean volumetric flow rate of the liquid.

When connected to a laptop PC, the flowmeter can provide a graphic display of the frequencies received by the transducers. This allows the evaluation of any noise levels on site which may interfere with the flowmeter's performance. The noise can be filtered out by implementing a software mask. This feature is not typically required unless excessive noise is produced on-site (for example, by variable frequency drives).

Designed for use in all weather environments, the waterproof enclosure houses circuit boards which are common to the whole product range. This ensures a cost effective installation in both ease of maintenance and spares holding. (Over 90% of the parts used in the manufacture of the ultrasonic flow meters are common.) The use of surface mount technology coupled with non intrusive transducers improves the mean time between failures (MTBF) of the flowmeters. The instruments are designed to meet today's exacting standards and are built in an ISO 9001 environment. CE, CSA, and CENELEC approvals are available, as well as NIST and NAMAS calibration certificates. Unique user interfaces are available with the instruments which is based on a Windows 95 or NT package. This interface allows easy configuration and the ability to utilize the comprehensive diagnostics within the instruments. Portable and dedicated flowmeter versions are available.