Vortex Flowmeters

Ultrasonic Vortex Flowmeter Model VRX10A

Model No.
VRX10A
VRX10A

Unlike piezoelectric vortex flowmeters, ultrasonic vortex flowmeters detect vortices by two ultrasonic beams and low flow rate can be measured.

  • Detects vortices with ultrasonic waves and can measure low flow rate
  • Rangeability is 80:1
  • Two pairs of ultrasonic sensors installed on the exterior of the detector can be replaced when they fail without removing the flowmeter from the piping.
  • Because two beams are used, if one pair fails, flow measurement can be continued with the other pair.

This flowmeter detects vortex generation by detecting a phase difference in ultrasonic waves by means of two pairs of ultrasonic wave sensors on the exterior of the detector. It is ideal for liquid flow rate measurement applications that requires high accuracy. With its high sensitivity and reliability, Ultrasonic Vortex Flowmeter is attracting attention as an ideal replacement for conventional differential pressure flowmeters.

Ultrasonic wave sensing

The vortex generator inside the detector generates a Karman vortex in the fluid. The frequency of the generated vortex is proportional to the flow velocity. The Ultrasonic Vortex Flowmeter detects the vortex by means of a phase difference in the ultrasonic waves and thus measures the flow velocity. Compared to conventional vortex flowmeters using a piezo element, the Ultrasonic Vortex Flowmeter has higher vortex detection sensitivity and is virtually unaffected by piping vibration.

Dual sensors

The ultrasonic propagation velocity changes depending on the temperature, so the temperature characteristics will be poor if only one pair of sensors is used for measurement. This product is designed to use two pairs of sensors to counteract this effect. Cross-sensing technology has greatly improved reliability.

Vortex detection at high sensitivity

The use of dual sensors also improves vortex detection sensitivity. Since Karman vortices weaken in the low flow rate range, conventional vortex flowmeters can measure flow rates down to 0.3 m/s, but the Ultrasonic Vortex Flowmeter can measure flow rates down to 0.1 m/s.

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