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Fine tek Rotary Paddle switch

15.Rotary Paddle Level Switch-SE Series

SE series operating principle is simple. A unit is usually located through a bin wall at the top, middle or low level of a bin. During normal operation (no material present) a synchronous motor rotates the paddle at 1 RPM. When this paddle rotation is impeded by material, surrounding the paddle, motor will stall and cause the Micro-switch to change state. (indicating an alarm or control)


  • Airtight sealing device, outdoor application is available.

  • Unique sealing ring design, it can perform good dust protection to avoid the dust permeate into housing body along with the shaft.

  • The torque force is adjustable.

  • The performance of torsion is stable and reliable.

  • If the rotary paddle bears an extra overload, the motor will be appeared slide to prevent the inside mechanism damaged.

  • It is rationally designed, the inside mechanisms are easily tore down for checking, maintenance and replacement. It doesn”t necessary to remove the complete set from the tank.

  • Very suitable for small tank and material of low density

16. Capacitance Level Switch-SA Series

capacitance level sensor measuring principle is base on the ” capacitance effects ” , when this level sensor is set on a silo, it will be formed a condenser between the detector electrode and the silo wall. The capacitance of this condenser varies proportional to the change of material specific inductivity ( DK value) of the material stored in the silo , when the more material substances increased in the silo, the more capacitance value added simultaneously, then it will let his interior circuit “s resonant signal to create a bigger amplitude ,and such a signal amplitude become more or less than factory default threshold value, the relay device will be energized.


  • No moving parts inside the