Admittance Level Switch

Admittance Level Switch is a point-level detection sensor that detects the presence or absence of liquids, slurries or bulk solids by measuring changes in electrical admittance at the probe, providing reliable detection even with buildup or varying material properties.

Insensitive to coating on the probe, ensuring stable operation and fewer false alarms.

Works with liquids, slurries and bulk solids regardless of conductivity or dielectric variations.

Robust electronics and no moving parts reduce maintenance effort and downtime.

It is not affected by material adhesion at the bottom of probe since the detecting electrode to monitor capacitance changes is integrated at the tip of the probe.

Generally the detection sensitivity varies depending on the probe length.

Our probe has the guard electrode inside the probe and the structure allows common internal PCB covering all models.

No need to keep multiple spare PCBs.

1. 2-color operation LED visible through the housing cover
2. Screw-clamp Terminal Block
3. 310-degree swivel housing
4. Detection mode (upper or lower limit) selectable
5. Free power source (AC/DC22-264V 50/60Hz)
6. Allowable temperature Max. 150deg as standard

The relation between admittance (Y) and Capacitance (C) is generally defined as the following formula:

Yc = jwC

Where:

• Yc = Capacitive admittance
• j = Imaginary unit
• w = Angular frequency
• C = Capacitance (Capacitive property of media)

Therefore, where capacitance (C) becomes bigger, admittance (Yc) comes bigger accordingly.

Admittance Level Switch detects the level by this electrical characteristics of capacitors.

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