kaidi Smart Tuning Fork Density Meter

Product Description

The KD-YL series of insertion-type density meters feature an insertion-type installation and are widely used for measuring the density of media in pipelines, open tanks, and closed tanks.The fluid density is directly determined by the vibration frequency received by the tuning fork when the sensor is inserted into the medium. The sensor includes a built-intemperature sensor to provide temperature compensation.

Scope of Application: The insertion-type tuning fork density meter enables real-time, online density measurement. It can be used for process control of products where density is a key parameter, or for quality control based on solid content or concentration. Typical industries include the petrochemical, brewing, food, pharmaceutical, and mineral processing sectors (e.g., clay, carbonates, silicates, etc.). Specific applications within these industries include interface detection in multi-product pipelines, density measurement of stirred mixtures, end-point monitoring in reactors, and interface detection in separators. The sensor operates based on the principle of component vibration, with the component being the tuning fork immersed in the liquid being measured. The tuning fork section generates vibrations via an internal piezoelectric device fixed to one end of the fork. The vibration frequency is detected by a secondary piezoelectric device fixed to the other end of the fork, and the signal is then amplified by the circuitry at the top. Liquid density is closely related to the vibration frequency when the liquid is flowing; when the density of the measured liquid changes, the vibration frequency during flow also changes. The density of the measured liquid can be accurately calculated using the following equation:

How It Works

D = K0 + K1T + K2T²

D = Density of the uncalibrated medium (kg/m³)

T = Vibration frequency (μs)

K0, K1, K2 = Constants

During density measurement, the APX301 insertion-type density meter automatically compensates for the effect of temperature on the density (D) of the medium being measured; pressure has no significant effect on density.

Applications

▲Industrial Automation Applications

▲Petroleum Refining and Chemical Industry

▲Extraction and Concentration Equipment (Food Industry)

▲Healthcare Applications / Pharmaceutical Industry

▲Environmental Protection Industry, Desulfurization and 

▲Denitrification, etc.

Product Features

▲Offers multiple installation options: insertion measurement, horizontal pipe mounting, and side mounting

▲This online density transmitter is suitable for both flowing and static liquids

▲Features a two-wire transmitter with an integrated design, no moving parts, and simple maintenance

▲Calibration of the online density meter requires no standard reference source; it can be easily calibrated on-site without interrupting the process

▲Suitable for measuring high- and low-temperature media, as well as high-viscosity media containing impurities

▲Excellent overpressure protection, superior temperature stability, fully welded and sealed construction, and a robust, reliable design

▲Simplified maintenance; media with high viscosity require only periodic cleaning

Common Installation Methods

To ensure accurate measurements and stable readings from the density meter, the flow velocity of the medium being measured must not exceed 1 m/s. The diameter of the pipeline in which the density meter is installed must be 159 mm or greater, and the meter should be installed as far away from the pump as possible, preferably at a distance of more than 5 m; When the flow velocity exceeds 1 m/s, an enlarged-bore installation must be used. For every 1 m increase in flow velocity, the diameter of the pipeline where the density meter is installed must be increased by a factor of 1.5. There must be a straight pipe section of ≥ 600 mm before the instrument and a straight pipe section of ≥ 300 mm after the instrument to ensure that the fluid is in a laminar flow state as it passes through the meter body, as shown in the figure.

ical Specifications

▲Important Notes：

Exclusions: Flocculent solutions (such as pulp) Unstable flow rates or fluid velocities exceeding 1 m/s Solutions with varying viscosity Pipe diameters less than DN50 Situations where temperature effects are significant