Overview of Non-Contact Thickness Meter and Related Products
The VE series gap detector measures and displays the gap (displacement) from the capacitance of the sensor and the object being measured. The capacitance C is a function of the opposing surface area S of the conductors and the gap D.
When opposing conductors (sensor and object being measured) are parallel plates, the relationship is represented as shown in the diagram, and the gap is measured from the capacitance. This concept has existed for some time, but because C and D are inversely proportional and capacitance is minute, it was difficult to obtain a wide measurement range and stability.
Our company has overcome these shortcomings through a new circuit design, achieving even higher precision and superior stability.
When measuring conductors and semiconductors
When measuring a conductor, two sensors are placed parallel to the object being measured, within their respective measurement ranges.
Set the distance between these two sensors (Gs) in the CL-7100 series.
The object to be measured is inserted between sensors A and B, and the gap (Ga, Gb) between each sensor and the object is measured to determine the thickness (t).
When measuring an insulator (CL-0740 option)
The distance (Gs) between the sensor and the conductor (reference floor) is set in the CL-7100 series. When the object to be measured is inserted between the sensor and the conductor (reference floor), the sensor output becomes Ga, and the thickness (t) is determined from this change in sensor output and the relative permittivity εr.
(CL-0740 Insulator Measurement Function)
εr: Relative permittivity (The relative permittivity is the permittivity of the object being measured when the permittivity of vacuum is set to 1.)