The high-reliability tuning fork liquid level switch can not only greatly improve the operating efficiency in the industrial production process, but also avoid many failures and dangers, and ensure the personal safety of the on-site staff.Recently, the Huikeda online level measurement team made statistics in the background messages and found that there are many problems that bother you. Among them, a friend had questions about some of the domestic tuning fork level switches they bought, and felt that the reliability and alarm accuracy of the products were poor, but such problems did not occur after purchasing the Huikeda tuning fork level switches. what is the reason?Today we will talk about this phenomenon.Working principle of tuning fork level switchTo explore the mystery that affects the reliability of tuning fork level switches, we must first understand its working principle.Tuning fork level switches are widely used in petrochemical, metallurgy, light industry, building materials, environmental protection and other industries. Its main function is to alarm and control the upper and lower limits of the liquid level.The tuning fork liquid level switch makes the tuning fork vibrate at a certain resonance frequency through a pair of piezoelectric crystals installed on the tuning fork base. When the tuning fork is in contact with the measured medium, the frequency and amplitude of the tuning fork will change. These changes will be detected and processed by the intelligent circuit and converted into a switch signal to achieve the purpose of alarm or control. t: thickness of fork body (m) l: length of fork (m) e: Young’s modulus (unit: kilogram force/m) : density of fork material (kg/m) acceleration of gravity (980 cm/sec) according to this Formula, the method of adjusting the nominal frequency of the tuning fork can be achieved by adjusting the thickness and length of the tuning fork and changing the material of the tuning fork body. The vibration frequency is inversely proportional to the square of the fork length. The longer the fork length, the lower the frequency; and it is proportional to the thickness of the fork. The thinner the fork, the lower the vibration frequency.Truth 1: The impact of the vibration environmentGenerally speaking, the random vibration frequency of the working environment is generally 0~800HZ, and the frequency of the tuning fork liquid level switch is prone to resonance in the above range. Once the tuning fork level switch is disturbed by external vibrations, the measurement accuracy will be greatly reduced, resulting in unreliable measurement results and even false alarms.Truth 2: The solid-liquid tuning fork switch is unreliableAt present, many tuning fork level switches produced by domestic manufacturers can measure both liquids and solids. This kind of dual-use product is generally realized by sacrificing a part of the medium density. The frequency value of the tuning fork liquid level switch is generally 600~800HZ. So it will inevitably lead to narrow application range, poor adaptability, and low reliability, especially for some special applications, it will lose the decisive role.Comparison table of Huikeda tuning fork liquid level switch and domestic brandThe R&D engineers of Huikeda Automation Technology Co., Ltd. designed a tuning fork level switch specifically for liquid measurement based on the design principle of detecting the change of the vibration frequency when the fork body is immersed in the medium. The tuning fork frequency is set at about 1200Hz, and the liquid level can be detected by the change of the vibration frequency when the tuning fork body contacts the medium. Huikeda tuning fork liquid level switch is not only suitable for liquid level measurement in containers, storage tanks and storage tanks, but also suitable for complex measurement occasions with foam, air bubbles, viscous liquid and vibration interference.
In addition, the lowest liquid density can be measured as high as 0.5g/cm. This makes the Huikeda tuning fork liquid level switch stable and reliable under wider and more complex working conditions.
Post time: 21-09-21