Admittance Level Switch

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Brand: Matsushima
Origin: Japan

Advantages

  1. Not only liquids and granular materials, but also highly viscous objects such as slurries can be detected without malfunction.
  2. One type of substrate supports from low sensitivity to high sensitivity. There is no need to replace the board according to the difference in the capacitance of the measurement object. It is OK to prepare a spare board with the minimum necessary.

Features

  • Insensitive to adhesion
  • Guard electrode technology
  • Six functions that emphasize on-site usability

Operating principle

The relational expression between admittance (Y) and general capacitance (C) is as follows.

When the capacitive property of the object to be measured is C,
Yc=jw C
Yc: Capacitive admittance
j: Imaginary number
w: AC angular frequency
C: Capacitance (capacitive property of the object to be measured)
As C increases, so does Yc.

Admittance level switch detect the storage level based on the electrical properties of this capacitor.

 

How to use?

  1. Determine mounting position

    Mounts to ceiling or tank sidewall. Avoid installing near sources of intense vibration such as knockers, which may cause malfunction or false detection.
  2. Mounting:

    Avoid direct contact with the electrode while it is being charged, as this may cause damage. It is effective to attach a protection plate. Also, when installing on the lower side wall, tilting the probe by 20° or more can reduce the load on the probe.
  3. Wiring:

    Be sure to ground first. The power supply is a free power supply and supports AC/DC22~264V 50/60Hz. The output signal is SPDT and the contact capacity is AC250V, 5A/DC30V, 5A.
  4. Adjustment:


    There are 4 levels of sensitivity adjustment. Further fine tuning is possible.
    Next, set the detection operation selector switch to set the contact output operation for the upper limit or lower limit and the lamp display.

Specifications:

Dimension:

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