Tuning fork level switch
DHE-FT tuning fork level switch is Dinghuadian A sub developed and produced one dedicated to level measurement The control switch is the same as the traditional float level switch, resistor Compared with level instruments such as rotary level switches, its higher reliability in bit detection and is now A very widely used in the generation of automated production Level measuring instruments.The product combines the unique "ELL letter" of Dinghua Electronics No. analysis technology" and leading manufacturing process, guarantee High reliability of DHE-FT tuning fork level switch and durability."ELL Signal Analysis Technology" is based on external testing A signal processing technology developed by liquid level technology,This advanced signal processing technology is derived from tens of thousands of Level instrumentation, application experience in hundreds of working conditions and Thirty years of data accumulation on the industrial site, through this The knowledge and experience summed up from these data form a prior Advanced algorithm, the reliability and stability of instrument products Qualitative play to the extreme.
Measuring principle
During the working process of the DHE-FT tuning fork level switch, the piezoelectric crystal drives the fork bodyvibrate at a certain resonant frequency. When the density of the medium contacted by the fork body changes When , the fork body and the contacted medium form a new resonance system, and at the same time the resonance of the fork body The frequency changes, and the denser the medium, the lower the resonant frequency. The frequency changes The process is continuously monitored by the circuit, and the circuit judges the frequency change and outputs output switch signal.
When the tuning fork level switch is used for low level alarm When the level in the storage tank or pipeline drops to a low At the position of the fork body, it will cause the totality of the fork body The vibration frequency rises, and the circuit monitors the change of the fork body.and toggle the output state. When the tuning fork level switch When used for high level alarm, in storage tank or pipeline When the material level rises above the position of the fork,It will cause the resonant frequency of the fork to decrease, and the circuit monitoring This change in the fork is detected and the output state is switched.
Technical features
1. "ELL signal analysis technology" meets the highest requirements for level measurement: Dinghua Electronics' unique "ELL signal analysis technology" overcomes the problems of interference factors such as foam, adhesion, and medium composition changes through advanced intelligent processing methods It is suitable for various complex on-site working conditions, and works stably and reliably for a long time.
2. No mechanical moving parts: maintenance-free, no wear and tear, long service life.
3. Wide range of applications: the product is suitable for level measurement of containers, tanks and pipelines in various industries.
4. Simple installation, no calibration required: ready to use, the overall structure of the product is small and light, the workload of on-site installation is extremely low, and no debugging and calibration is required.
5. Magnetic test point function: The magnetic test point is located on the side of the instrument case. This function makes the on-site function test easier. Users can regularly perform self-tests on the instrument according to site requirements.
6. Fork body damage monitoring: The software monitors the frequency change trend of the output electrical signal, and judges whether the fork body is corroded and the degree of corrosion based on the frequency change trend, which provides a reliable guarantee for accurate level measurement. Anti-turbulence, splash, foam, vibration design.
