Spiral vortex gas flowmeter is a high-performance flow measurement instrument launched by Jiangsu Jinling Instrument Co., Ltd., widely used in various gas flow monitoring scenarios. This flowmeter has become the preferred product in the market due to its principles and characteristics.

Its working principle is based on the vortex precession effect: when the fluid flows into the flow sensor along the axial direction, under the action of the vortex generator, the fluid is forced to rotate around the centerline, generating a stable vortex flow. The vortex flow spirals in the Venturi tube, accelerates through the contraction section, and precesses along a conical spiral in the diffusion section. At this point, the precession frequency of the vortex center through the detection point is proportional to the fluid flow velocity, and the piezoelectric sensor converts this frequency signal into a flow rate value to achieve accurate measurement.

The flowmeter has significant features: the circuit adopts surface mount technology, the structure is compact and the reliability is high; No mechanical moving parts, excellent stability, not easy to corrode and no need for mechanical maintenance, greatly reducing maintenance costs. At the same time, it has low requirements for the front and rear straight pipe sections≥3DNAfterwards≥1DNFlexible installation. High contrast LCD display can intuitively display accumulated flow and instantaneous flow, with convenient reading. In addition, the instrument has a password setting function to prevent illegal settings; The power-off data saving function ensures that data is not lost.

In terms of output signal, it supports three wire pulse signal output, with a transmission distance of up to200m；（4~20）mAStandard analog signal linearly corresponds to flow range and transmission distance≤1500m; also equipped withRS485Communication interface, which can be directly connected to the upper computer for remote monitoring and data transmission.

Spiral vortex gas flowmeter plays an important role in various fields such as petroleum, chemical, and gas due to its high precision, high stability, and convenient operability, providing reliable flow measurement solutions for enterprises.