The DFS2 Flowmetrix Doppler flow switch is a cost-effective solution to nonintrusive flow switching. The DFS2 is the latest edition to the Flowmetrix range of Doppler flow products. It offers enhanced performance and includes a 10 LED bar graph flow indicator. The DFS2 is quick and easy to install with no holes needed in the pipe, no sensor fouling, no maintenance and no downtime for sensor installation. It cannot suffer from residue build-up or sensor corrosion. Continuously measuring the velocity of fluid in pipelines using the nonintrusive Doppler principle, the DFS2 has both high and low adjustable setpoints allowing flow control within the specified limits. This versatile flow switch is well suited to pump protection, flow/no flow alarms and valve control and is suitable for use on a variety of metal and plastic pipes having an ID of 25 mm or larger.
The device is designed for use with fluids containing in excess of 0,1% suspended solids or bubbles, having a size greater than 100 µm. Typical applications include slurries, sewage, sludge, pulp, food products, aerated water and abrasives. Also included is a relay with adjustable high and low setpoint control and adjustable delay-on and delay-off timers. The DFS2 has two selectable flow ranges, 0-2 m/s and 0-6 m/s.
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