Key Features of the VFD/VFT Anti-Vibration Vortex Flow Meter

Advanced FFT Signal Processing: Uses advanced Fast Fourier Transform (FFT) spectrum analysis technology for flow signal processing.

High Stability and Vibration Resistance: Designed to maintain stable measurement performance in environments with pipeline vibration.

Low Flow Velocity Measurement: Measures liquid flow velocities as low as 0.2 m/s.

High Reliability and EMI Resistance: Uses isolation technology for vortex signal processing to provide strong resistance to electromagnetic interference (EMI).

Low Power Consumption: Features a low-power design, with an operating current of less than 4 mA and total power consumption below 100 mW.

Vortex Flow Meter Data Sheet

Accuracy Class	1.0 (Gas); 0.5 (Liquids, Maximum)
Nominal Diameter	DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600
Pressure Rating	1.0 MPa, 1.6 MPa, 2.5 MPa, 4.0 MPa, ANSI 150, ANSI 300 (Other pressure ratings available upon agreement)
Sensor Wetted Parts Material	304 Stainless Steel, 316L Stainless Steel, Hastelloy C (Other materials available upon agreement)
Ingress Protection Rating (IP Rating)	IP65, IP66, IP67
Explosion-Proof Rating	Intrinsic Safety: Ex ia IIC T1–T6 Ga Integral Flameproof: Ex db IIC T1–T6 Gb Remote Flameproof: Ex db eb IIC T1–T6 Gb Intrinsic Safety for Dust: Ex ia IIIC T200 80°C Da Flameproof for Dust: Ex tb IIIC T80°C Db
Medium Temperature Range	-40°C to +200°C (Standard Model); -40°C to +400°C (High-Temperature Model)
Ambient Temperature	-30°C to +70°C
Repeatability	±0.3%
Turndown Ratio	1:20 (Up to 1:30)
Flow Velocity Range	Liquid: 0.3–7 m/s; Gas: 3–60 m/s; Steam: 2.5–60 m/s
Cable Gland	G1/2", NPT1/2", M20 × 1.5
Power Supply Voltage	External Power Supply: 16.5–42 VDC (For HART communication, a minimum load resistance of 250 Ω and a 21.5 VDC power supply are required); Modbus: 21.6–26.4 VDC; FF: 9–32 VDC
Output Signal	Analog Output: 4–20 mA; Pulse Output
Communication Protocol	HART; Modbus (RS485); FF

Working Principle of the Vortex Flow Meter

A vortex flow meter is a fluid oscillation flow meter based on the Kármán vortex street principle. When a non-streamlined bluff body is placed in a flowing fluid, two alternating rows of vortices are generated on either side of the body downstream.