China New Product Water Flow Meter Pulse Output - SUP-LUGB Vortex flowmeter without temperature & pressure compensation – Sinomeasure

• Measuring principle

  A fluid flowing with a certain velocity and passing a fixed obstruction generates vortices. The generation of vortices is known as Karman’s Vortices.The frequency of vortex shedding is a direct linear function of fluid velocity and frequency depends upon the shape and face width of bluff body.

Since the width of obstruction and inner diameter of the pipe will be more or less constant, the frequency is given by the expression:

f=StV/d

In the formula:
f – Karman vortex frequency generated at one side of bluff body (Hz)
St – strouhal number (non-dimensional number)
V – average speed of fluid (m/s)
d – width of bluff body (m)

• Installation

  Wafer connection: DN15-DN300(priority PN2.5MPa)

  Flange connection: DN15-DN50(priority PN2.5MPa）

DN65-DN200(priority PN1.6MPa）

DN250-DN300(priority PN1.0MPa）

• Accuracy

Gas without compensation: DN15-DN25–1.5%, DN32-DN200–1.0%, DN250-DN300–1.5%

• Range Ratio

Gas density:1.2kg/m3, Range ratio: 8:1

• Medium Temperature

-20°C ~ +150°C、-20°C ~ +260°C、-20°C ~ +300°C

• Power Supply

24VDC±5%

Li battery(3.6VDC)

• Output signal

4-20mA

Frequency

RS485 communication (Modbus RTU)

• Ingress protection

IP65

• Body Materials

  Stainless stell

• Display

  128*64 dot matrix LCD

Noted: the product strictly prohibited to be used in explosion-proof occasions.