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NYDE Tuning Fork Resonance Density Meter
The NYDE plug-in density meter adopts plug-in installation and is widely used in pipelines. The density of medium in open tanks and closed tanks is directly determined by the vibration frequency received by the tuning fork of the sensor inserted into the medium. The built-in temperature sensor of the sensor provides temperature compensation for it.
Scope of application: The plug-in density meter can perform density detection online in real time. It can be used for process control of products with density as the basic parameter or quality control with solid percentage or concentration percentage as a reference. Typical industries include petrochemical industry, wine industry, food industry, pharmaceutical industry and mineral processing (such as clay, carbonate, silicate, etc.), which are specifically used in the interface detection and mixing of multi-product pipelines in the above industries The density detection, the end-point monitoring of the reactor, and the interface detection of the separator.
NYDE Tuning Fork Resonance Density Meter Technical Parameters
| Measuring range | 0 – 2.5 g /cc (0 – 2500 kg/m3),0~100.0% |
| Calibration range | 0 – 2.5 g /cc (0 – 2500 kg/m3),0~100.0% |
| measurement accuracy | ± 0.002 g /cc (± 2 kg/m3) ,±0.5% |
| Repeatability | ± 0.001 g /cc (± 0.2 kg/m3) ±0.1% |
| Medium temperature range | -50℃~+150℃ |
| Working pressure | 4mpa |
| Fluid viscosity range | 0–600 cP |
| Temperature Coefficient | ＜ 0.1 kg/m3/℃(±0.5%) After correction |
| Stress effect | Negligible |
| Built-in temperature sensor | Digital sensor |
| Wetted material | 316L,2205 Stainless steel,哈 C,Titanium alloy |
| Fork body coating | Standard PTFE or PFA |
| Power supply | 24VDC,≥50 mA |
| Analog signal output | 4-20 mA,0-1000Hz,RS485 Modbus RTU |
| Output accuracy (20℃) | ±0.1% of reading or ± 0.05% FS |
| Output repeatability (-40~+85℃) | ± 0.05% FS |
| Process connection | DIN 50 PN16 DIN 50 PN40 |
| IDF and RJT sanitary | |
| Protection level | IP67 |
| shell | Aluminum alloy |
NYDE Tuning Fork Resonance Density Meter Operating Principle
The sensor works based on the principle of component vibration, and the component part is the part of the tuning fork immersed in the measured liquid. The tuning fork part induces vibration through an internal piezoelectric device fixed at the bottom end of the fork body. The oscillation frequency is detected by a secondary piezoelectric device fixed at the other end of the fork body, and then the signal is amplified by the circuit on the top. The density of the liquid is closely related to the vibration frequency when the measured liquid flows. When the density of the measured liquid changes, the vibration frequency when the liquid flows also changes. Through the following equation, the density of the measured liquid can be accurately calculated.
D= K0+K1T+K2T2
D= Uncalibrated density of the measured medium (kg/m3)
T= Vibration frequency (μ s).
K0 , K1 , K2= constant
In the process of density detection, NYDE plug-in density meter can automatically compensate for the influence of temperature on the density (D) of the measured medium, and pressure has no significant influence on density.
NYDE Tuning Fork Resonance Density Meter Design Features
◎ Suitable for tank, pipeline, flow or static medium density measurement. Suitable for measuring high temperature, low temperature, containing impurities and high viscosity medium.
◎ Microprocessor-based electronic conversion device, integrated signal processing, calculation and diagnostic functions.
◎ Continuous online measurement of liquid density and temperature, high precision, more safe and reliable, can be directly used for production process control.
◎ It can communicate with PC directly through RS485 interface. Users can directly configure nodes, diagnose faults and record data online.
◎ The basic density, concentration percentage, mass percentage, volume percentage and other parameters can be calculated while measuring density and temperature.
Excellent overpressure protection structure, superior temperature stability, full welding seal, solid and reliable design.
◎ Easy to install and use, insert the liquid can display the reading.
◎ Easy maintenance, no regular cleaning.
◎ Calibration without standard reference source, no laboratory calibration, no process interruption.
◎ The intrinsically safe type can be used in dangerous sites, and the sanitary type can be installed in food production sites.
