上海席肯電子科技有限公司 主營:NOHKEN(日本能研),MOBREY()英國莫博瑞),SIMENES(德國西門子),浮球液位計,阻旋料位計,磁翻板液位計,音叉料位計,射頻導納料位計,超聲波液位計,雷達料位計,連桿浮球液位計, 磁致伸縮液位計, 流量開關, 空氣錘,氣動振動器,

福建22选5预测:NOHKEN靜電容量式物位開關

  • NOHKEN靜電容量式物位開關
  • Features
  • Easy programming by push buttons
  • Multifunctional with microcomputer
  • First level switch to have status indicating LCD
  • Improved buildup prevention performance
  • Extremely reliable
  • Principle of Operation

福建22选5走势图彩票走势图大全 www.wgnwnb.com.cn        

      Set range is divided into 8 segments, and ON/OFF points are set for the segments. Hysteresis is also programmable.

The basic oscillator circuit is of the parallel resonance circuit with L (coil) and C (capacitance between the electrodes).
The oscillation frequency (f) of this circuit is : f = 1/2 π √LC.
The frequency without material around the sensor (f1) is: f1 = 1/2 π √LC, where C is the capacitance without material around the sensor (zero point).
With material around the sensor, the capacitance increases (C+ΔC), and the frequency (f2) is: f2 = 1/2 π √L(C+ΔC), where C+ΔC is the capacitance with material around the sensor (span point).
The sensor detects the frequency change from f1 to f2, and actuates the relay. The frequency range is divided into 8 segments (between zero and span), and the set and reset points assigned on a desired segment, which means high limit, low limit and hysteresis can be programmed.

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