Working principle: When the measured fluid passes through the annular gap formed by the vertebral canal and the float from bottom to top, the upper and lower ends of the float generate differential pressure to form a rising force of the float. When the lifting force on the float is greater than the weight of the float immersed in the fluid, the float will rise. , the area of the annulus increases, the fluid velocity at the annulus decreases immediately, the differential pressure at the upper and lower ends of the float decreases, and the lift acting on the float also decreases, until the lift is equal to the weight of the float immersed in the fluid, and the float is stable at a certain height. There is a corresponding relationship between the height of the float in the spinal canal and the flow through it.

　　Measurement advantages:

　　1. Sturdy all-metal structure design;

　　2. Non-contact magnetic coupling transmission indicator;

　　3. Stainless steel, Hastelloy, titanium, PTFE material measurement system can be selected, which can be suitable for high temperature, high pressure and strong corrosive medium;

　　4. Low pressure loss design;

　　5. Short stroke, micro-miniature structure design, total instrument height 250mm;

　　6. The magnetic coupling structure design ensures more stable signal data transmission;

　　7. It can be equipped with thermal insulation or heat tracing jacket structure;

　　8. The installation method can be divided into vertical and horizontal installation, which can be adapted to various installation occasions;

　　9. Suitable for small diameter and low flow rate medium flow measurement;

　　10. Stable measurement, reliable work, small maintenance and long service life;

　　11. The requirements for the straight pipe section are not high, the first 5DN and the rear 250mm are sufficient;

　　12. Wide flow range ratio: 10:1;

　　13. Double-line liquid crystal display, on-site instantaneous and cumulative flow display can be selected, and backlight can be used;

　　14. Can be used for measurement in flammable and explosive hazardous environments;

　　15. The power supply can be 24V or lithium battery self-powered;

　　16. Multi-parameter intelligent calibration function;

　　17. With data recovery, data backup and power-down protection functions.