Vortex street flowmeter is based on the principle study street Carmen (Karman) Vortex production can be measured flowmeter gas, vapor or liquid volume flow, standard condition volume flow or mass flow rate. Setting triangular columnar vortex shedder in the fluid from the vortex of both sides alternately produce two columns of a regular vortex, this vortex is called Karman Vortex street. Listed in the vortex of the vortex downstream of non-symmetrically arranged. Load capacitance detection probe detection probe in the whirlpool or a piezoelectric body occurs and the corresponding matching circuit, can constitute the capacitance detection type Vortex street traffic / or piezoelectric sensor detection type flow sensor Vortex street. 
Features: 
Small pressure loss, wide measuring range, high accuracy; 
No moving mechanical parts, simple structure and easy installation and maintenance firm; 
Detecting sensor is not in direct contact with the medium, stable performance, long life; 
Sensor output pulse signal, the actual frequency and the measured fluid flow is linear, no zero drift, performance is very stable, the structure forms, there are pipe-stage, in the form of plug-flow sensor; 
Using interference cancellation circuit and vibration sensor head, it has a certain resistance to environmental vibration performance; 
Long-term use of stable and reliable, easy maintenance.

Technical Parameters: 
Measuring media: liquid, general gas, steam (single-phase medium or may be considered to be a single-phase medium) 
Measuring range: pipe-stage (full tube type) DN15 ~ DN300 plug-DN200 ~ DN1500 (with specific reference to the back) 
Flow rate range: Liquid: 0.35 ~ 7.0m / s gas: 5.0 ~ 60.0m / s 
Steam: 6.0 ~ 70.0m / s (with specific reference to the back) 
Medium temperature: -40 ℃ ~ 320 ℃; 
Pressure rating: 1.6Mpa, 2.5Mpa, 4.0Mpa 
Accuracy: Liquid 1.0, gas 1.5, plug-range ratio 2.5: 1: 10 to 1:20 
Material: 304 or 316 stainless steel Reynolds: normal 2 × 10³ ~ 7 * 10 * 10 extended 1 to 7 * 10 
Drag coefficient: full tube Cd≤2.6 
Allow vibration acceleration: ≤0.2g 
Input signal frequency: 0 ~ 3000Hz 
Protection class: Normal: IP65 
Explosion levels: ExdIICT6 
Ambient temperature: -20 ℃ ~ 60 ℃ 
Relative humidity: 5% to 90% 
Atmospheric pressure: 86 ~ 106kPa 
Power supply: 24VDC ± 15%, power consumption <0.5W 
Battery-powered 3.6V (one temperature and pressure compensated) 
Output signal: ① pulse output width 1 / 2fin × 1000 (ms) low level <0.8V, high level> 22V② two-wire or three-wire system 4 ~ 20mA output load ≤600Ω 
Communication interface: RS485 
Communication protocol: MODBUS-RTU protocol (optional HART) 
Installation: Plug In, flange, flange clamp flange standard: GB / T9119-2000 (customizable American standard, Japanese standard)

Liquid flow range test using water at room temperature conditions (t = 20 ℃, ρ = 1000kg / m³). 
Use gas test measuring range air temperature and pressure conditions (t = 20 ℃, P = 101.325Kpa, ρ = 1.205kg / m³).

Example: LUGA-C1-D-4-DN600-2-MPYSS intelligent integration type Vortex street Flow instrument, DC24V power supply, valve plug-in connection, pipe diameter of DN600, two-wire 4 ~ 20mA current output, MODBUS-RTU protocol , ordinary type, a liquid medium, the core components are made of 304 stainless steel, 304 stainless steel sensor material.