CAPACITIVE MEASURING SYSTEMS
Capacitive systems are non-contact devices capable of high-resolution measurement of the position and/or change of position of any conductive target.
How does capacitive measuring work?
In a capacitive position sensor, the electrified plate is the sensor surface and the second plate is the target. The electronics continuously change the voltage on the sensor surface. This is the excitation voltage. The amount of current required to change the voltage is detected by the electronics and indicates the amount of capacitance between sensor and target. An AC bridge circuit or other active electronic circuit is typically used to convert the capacity change into a current or voltage signal and output. In ordinary capacitance-based position measurement, the size of the sensor and the target, and the dielectric medium (usually air) remain constant. The only variable is the gap. All changes in capacitance are therefore the result of a change in the position of the target relative to the sensor. The driver is calibrated and the output scaled to provide a specific voltage for a corresponding change in capacitance (i.e., gap or displacement).
Advantages of Lion Precision's capacitive technology
- Non-contact
- Bandwidth up to 15 kHz
- Low noise level
- Nanometer resolution
- Factory calibrated
- Great linearity
- Thermally compensated to minimize thermal drift
- High quality, vacuum compatible materials
- Stainless steel construction
.jpg)
Three different types of capacitive measuring systems are available
(click for more information)
Elite series - Best performance / Modular design
Compact driver - Great performance / Compact size
CPA100 - Analog proximity / Lower cost
Ranges and resolution
For more information, please open / download our Non-Contact measurement brochure below:
