Báo mức chất lỏng Finetek on-off SC – Tuning Fork Level Switch Sensor
1. Nguyên lý hoạt động của báo mức chất lỏng Finetek SC
The piezoelectric component is used to drive the tuning fork and feedback signal, which produces the resonation on the fork. When the fork comes into contact with a material, the fork will release some frequency signal as feedback. It will be converted into the output of the contact signal when the circuit detects the frequency decrease of the signal. The product relies on the damping effect by covering the testing material on the tuning fork which reduces the vibration frequency of the tuning fork and outputs a switch signal. Therefore, there is no signal amplification circuit inside, which can eliminate the trouble of frequent sensitivity adjustment due to the material change.
2. Đặc điểm và tính năng của báo mức chất lỏng on-off Finetek SC
SPDT Relay output, SSR MOSFET output.
Wide voltage supply range 20~250 Vac/Vdc,50/60Hz
No frequent calibration required, easy-to-use, sturdy and durable design. High/low failure safe mode, safe and reliable.
Sensitivity adjustment is available for different densities of media. Fine powder can be detected.
Suitable for liquid, powder, and solid application.
Dual insulation can reduce damage on the PCB board caused by great changes in temperature and humidity, as well as condensation effects (SC3 series).
It can be tested by pressing the test button after installation (SC3 series).
Output switch delay function (SC3 series).
Self-diagnosis mechanism can detect the abnormality such as the abrasion of the tuning fork or the material viscosity (SC3 series).
The compact built-in wiring box can save the installation space (SC3 series).
The wiring box can rotate 270 degrees, facilitating adjustment of the inlet direction (SC3 series).
The minimum measurable specific gravity can reach 0.01 g/cm3 (SC35 series).
Ultra protection mechanism can set the secondary output contact point as alarm output (SC35 series).
Support the function of detecting underwater sediments (SC35 series).
All-in-one design, 3/4″ (SC38 series) 、1″ (SC39 series) thread is suitable for the installation of a small tube.
Adjustment setting for different densities of media ρ>0.5 g/cm3 or ρ.0.7 g/cm3 (SC38 & 39 series).
Switch delay setting function (SC3 series).
Alarm indicators based on failure status or output status selected according to the customer’s habits (SC3 series).
Automatic calibration of the operation points for different densities of media as required by the customer (SC38 & 39 series).
3. Ứng dụng của báo mức chất lỏng on – off Finetek SC
The tuning fork level switch can be widely applied to detect the min. and max. level in tanks, silos and hoppers filled with materials of different densities and state. The following list shows its applications.
4. Thông số kỹ thuật báo mức chất lỏng on-off SC
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