Spiral vortex flowmeter is a gas measuring instrument used in the fields of petroleum, chemical, power, metallurgy, and urban gas supply. It is produced by Jiangsu Hongjia, Xiao'an Instrument and other enterprises and is suitable for natural gas transmission and distribution trade measurement scenarios. The core principle is based on the structure of the Venturi tube and the detection of vortex precession frequency. It generates secondary rotating vortices through spiral guide vanes and combines with a microprocessor to automatically compensate for temperature, pressure, and compression factor in real time.

 
This instrument adopts a mechatronics integrated design, integrating flow probes, pressure sensors, and intelligent chips. It has no mechanical movable parts and is corrosion-resistant. Built in dual detection anti-interference technology and intelligent earthquake resistant system, supporting operation without external power supply, equipped with LCD screen to display instantaneous/cumulative flow and environmental parameters. Supports RS485, HART protocol and other signal outputs, with built-in EEPROM for storing historical data throughout the year. The applicable temperature range is -30 ℃ to+80 ℃, with a nominal pressure of 6.3MPa. Installation must meet the requirements of upstream and downstream straight pipe sections and be regularly calibrated.