LUX series spiral vortex gas flowmeterDetailed product description：

1、 Principle
When the fluid flow sensor along the axial direction is fed in, it is forced to rotate around the centerline by the vortex generator, generating a vortex flow. The vortex flow spirals in the Venturi tube and reaches the contraction section where it suddenly throttles, accelerating the vortex flow. When passing through the diffusion section, the vortex center precesses along a conical spiral line. At this point, the precession frequency of the vortex center through the detection point is proportional to the flow velocity of the fluid. The precession frequency signal of the vortex flow detected by the piezoelectric sensor is amplified, filtered, and shaped before being converted into a flow value for on-site display or signal selection.

2、 Characteristics
1. The circuit adopts surface mount technology, compact structure, and high reliability
2. Adopting low-power high-tech, it can work with both internal and external power sources, and has low overall power consumption;
3. Adopting high-performance microprocessors and modern filtering technology, with powerful software functions and superior performance;
4. No mechanical movable parts, good stability, not easily corroded, no need for mechanical maintenance;
5. The requirements for the front and rear straight pipe sections are low, with a front length of ≥ 3DN and a rear length of ≥ 1DN;
6. Adopting a high contrast LCD display, it can display cumulative flow and instantaneous flow, with convenient and clear readings;
7. The instrument has a password setting function to prevent illegal cheating settings;
8. The instrument has the function of saving power outage data;
9. Xindi displays the flow value and comes with pulse signals and (4~20) mA standard analog signals for remote transmission output, making it easy to connect with secondary instruments.

3、 LUX series spiral vortex gas flowmeter working power supply
Internal power supply: 3V lithium battery, power consumption ≤ 0.3mW, can be used for two years;
External power supply: 24VDC ± 15%, power consumption ≤ 1W.
2. Output signal
Pulse signal: Three wire pulse signal output, transmission distance ≤ 200m;
(4~20) mA standard analog signal: Linear for analog signals in the flow range of (0~Qmax) m3/h, transmission distance ≤ 1500m, connection method is two-wire or three wire system.
RS485 communication interface signal, directly connected to the upper computer for remote transmission of instrument related parameters and real-time data. At the same time, it can carry 8 flow meters with a dedicated MODEM.
3. Explosion proof grade: Ex D Ⅱ BT4
4、 Usage conditions
Environmental temperature: -30 degrees Celsius to+55 degrees Celsius
Relative temperature: 5%~95%
Medium temperature: -30 degrees Celsius to+80 degrees Celsius
Atmospheric pressure: 86kPa~106kPa;

5、 Product selection

code name	caliber	Flow range m3/h
LUX-25	DN25	2．5～30
LUX-32	DN32	4．5～60
LUX-50	DN50	10~150
LUX-80	DN80	28~400
LUX-100	DN100	50~800
LUX-150	DN150	150~2250
LUX-200	DN200	360~3600
	code name	Feature 1
	N	No temperature and pressure compensation

LUX series spiral vortex gas flowmeter