A turbine flow meter is a velocity-type instrument featuring high accuracy, good repeatability, simple structure, high-pressure resistance, wide measurement range, compact size, light weight, low pressure loss, long service life, easy operation, convenient maintenance, no zero-point drift, and high rangeability. It is used for measuring the volumetric flow rate and cumulative volume of low-viscosity, non-corrosive, and clean liquids in closed pipelines.

The primary structure of the turbine flowmeter consists of a turbine and an external pulse sensor. As the liquid flows into the turbine, it causes the rotor to rotate. The specific internal diameter ensures that the rotational speed of the rotor is directly proportional to the flow rate. The pulse sensor converts the detected rotation of the turbine blades into a pulse signal proportional to the flow rate. The specific variable is the K factor (number of pulses per liter), which each sensor is calibrated to determine and noted on the label. A calibration report can also be provided upon customer request.

The working principle: As a primary type of velocity flowmeter, the turbine flowmeter rotates its impeller when the measured fluid flows through the sensor. The rotation speed of the impeller is proportional to the average flow velocity of the pipe. Additionally, the blades periodically cut the magnetic field lines generated by the electromagnet, altering the magnetic flux of the coil. According to the principle of electromagnetic induction, a fluctuating electric potential signal, or an electrical pulse signal, is induced within the coil. The frequency of this electrical fluctuation is proportional to the flow rate of the measured fluid.

The liquid turbine flow meter features high-quality bearings and specially designed guide vanes, significantly reducing wear and being insensitive to peak values, even under harsh conditions, providing reliable measurement variables. The turbine flow meter outputs a pulse signal, which is easy to digitize. It has minimal pressure loss, and its blades are corrosion-resistant, allowing for measurement of viscous and corrosive media. When paired with a secondary instrument equipped with special functions, the turbine flow meter can also perform quantitative control and over-limit alarms.