WTL Pulse Output Vortex Flow Meter

WTL Pulse Output Vortex Flow Meter

Measurable steam,gas,Volume flow rate and mass flow rate of liquid
No mechanical moving parts,High measurement accuracy,Compact structure and easy maintenance
Low pressure loss,Wide range of measurement
The instrument adopts anti-interference circuit and anti vibration sensing head, which has
Anti environmental vibration performance
Measurable medium temperature reaches+350℃（+450℃）

general Describe——————————————

The LUGB vortex flowmeter is a volumetric flowmeter that measures the volumetric flow rate, standard condition volumetric flow rate, or mass flow rate of gases, vapors, or liquids based on the Karman vortex principle. And it can be used as a flow transmitter in automation control systems.
This instrument adopts advanced differential technology, combined with isolation, shielding, filtering and other measures, to overcome the problems of poor seismic resistance and small signal data disorder of similar products. It also adopts unique sensor packaging technology and protective measures to ensure the reliability of the product. The product comes in two forms: basic type and composite type. The basic type measures a single flow signal; The composite type can simultaneously measure temperature, pressure, and flow rate. Each form has a whole or separate structure to adapt to different installation environments.

Working principle one——————————————

A vortex flowmeter is composed of a vortex generator designed in the flow field, a detection probe, and corresponding electronic circuits. When the fluid flows through a vortex generator, two alternating rows of vortices are formed on both sides, which are called Karman vortex streets. Based on the theory of Karman vortex street, Strohal proposed that the frequency of Karman vortex street is proportional to the flow velocity of the fluid, and gave the relationship between frequency and flow velocity:
f = St× In the V/d equation:
Frequency of vortex street occurrence (Hz)
Average velocity on both sides of the vortex generator (m/s)
St Strohal coefficient (constant)
These alternating vortices form a series of alternating negative pressures, which act on the detection probe to generate a series of alternating electrical signals. After conversion, shaping, and amplification by a preamplifier, the output is a pulse frequency signal (or standard signal) proportional to the synchronization with the vortices.

Characteristics and Applications of Instruments 1——————————————

feature:
□ No movable parts, long-term stability, simple structure for easy installation and maintenance;

Adopting anti-interference circuit and anti vibration sensing head, it has certain anti environmental vibration performance;
Adopting ultra-low power single-chip microcomputer technology, one 3.2V10AH lithium battery can be used for more than 5 years;

Correction of instrument coefficient nonlinearity by software to improve measurement accuracy;

Small pressure loss and wide range of measurement;
Using EEPROM for power down protection of accumulated traffic, with a protection time greater than 10 years;
purpose:
This instrument can be widely used for measuring the flow of water supply and drainage, industrial circulation, sewage treatment, oil and chemical reagents, compressed air, saturated and superheated steam, natural gas, and various media in large, medium, and small pipelines