【Material】：SS304 Stainless steel
【Price】：$190.00 - $590.00
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Warranty:1 year
Certification:CE, ISO, MID, etc.
Customized support:OEM
Place of origin:Henan, China
Model Number:SDLU4-DN200
Type:Variable Area Air & Gas Flowmeters
Product Name:Thermal gas mass denso air biogas flow meter digital
Material:SS304
Model:SDLU
Medium:CNG, LPG, Steam,etc.
Connection:Flanged
Output:4-20mA
Power supply:12VDC~36VDC
Ambient temperature:-25 ~ +60℃
Accuracy:1.0% 1.5%
Protection grade:IP 65 / IP67 / IP 68(optional)
2. Working principle of industrial gas flow meter:
When the fluid medium in the pipeline passes through the vortex generator (triangular column), a vortex phenomenon is generated due to the acceleration of the local flow velocity (as shown in Figure 1). The vortex is divided into two rows and appears alternately. This vortex row is called the Karman vortex street.
The release frequency of the Karman vortex street is related to the width of the triangular column and the flow speed of the fluid, but has nothing to do with the temperature, pressure and other characteristic parameters of the medium. It can be expressed by the following formula:
f=StV/d ……………………（1）
Where: f—the release frequency of the Karman vortex street
St—Strouhal number
V—medium flow rate
d—The width of the triangular column
The Strohal number is an important parameter of the vortex flowmeter, and it is only related to the Reynolds number Re of the medium. As long as the Reynolds number of the medium in the pipeline is kept within the range of 2×104 to 7×106, the Strouhal number St will remain a constant. In this way, the flow rate of the fluid medium can be detected by measuring the vortex frequency signal, and then pass The flow rate of the medium calculates the flow rate of the medium.
