For over 30 years, Camille Bauer AG has been providing patented capacitive technology worldwide from Wohlen. Today, full-range rotation sensors and their contactless measurement represent a significant leap forward in fixing a rotating shaft to a unique angular position. This measurement can be achieved in various ways. Optical sensors are known to offer the highest resolution on the market today. Electromagnetic angle transmitters have the lowest production cost. Capacitive systems are among the best contactless sensor scanning systems for analog output signals. The measuring capacitor consists of two capacitor electrodes (stator). When the rotor is inserted between the two capacitor electrodes, its capacitance changes proportionally to the absolute angle of rotation. An oscillator generates a current proportional to the angle between the two capacitor plates. An electromagnetic compatibility filter is installed at the connection point to complete the overall assembly. The advantage of this measurement principle is low power consumption. We are the only company offering the KINAX series of angle transmitters with 4 to 20mA two-wire analog output. Other advantages are obvious. Capacitive angle values ​​are unaffected by magnetic fields. Therefore, angle transmitters are safe for applications such as those near railway traffic or high-voltage transformers. The high precision of the internal electronic components does not reduce the lifespan of the angle transmitter. Capacitive measurements are unaffected by temperature. The only concern is the wear and tear of individual components, a problem inherent in any transmitter. The capacitive angle transmitter's ability to rotate up to 360° is almost unbelievable, making it suitable for 360° angle applications. This is due to the unique structure of the capacitor. Currently, the analog output accuracy is 0.05°, consistent with 12-bit digital values; we are now using 16-bit. Another major advantage is its resistance to mechanical vibration and fluctuations. Therefore, its measurement principle is highly reliable, and the product has been widely used in diesel engines and large turbines. In recent years, capacitive angle transmitters have been successfully applied to steam turbines, exhibiting a 30g fluctuation during testing at 10...2000Hz. The accuracy of the capacitive angle transmitter falls between that of optical and electromagnetic transmitters. Compared with other angle transmitters: The optical system, as its name suggests, is based on the principle of an optical scanning system. Its central element is a rotating coded disk scanned by a beam of light. The final digital code matches the angle. This system is unparalleled in resolution and speed. However, the output signal of the encoded disk is very unstable in environments with strong vibrations. In harsh environments, the encoded disk may even be damaged. Moreover, it is susceptible to low temperatures, temperature changes, and the effects of dust and moisture. Another significant weakness is the lifespan of the light source. Over time, it becomes very fragile and difficult to scan in strong light and dark areas. Complex monitoring functions must be used frequently to compensate for this deficiency. Modern electromagnetic systems have replaced potentiometer angle transmitters. They are based on the principle of non-contact electromagnetic measurement; the transmitter rotates in a streamlined magnetic field to convert the angle signal into an analog signal. They are inherently more resistant to dust and moisture than optical angle transmitters, but they also have significant drawbacks. For example, use in harsh environments can severely affect their measurement results. Another important aspect is the inconsistent rotational force of the magnet. Magnet aging and temperature coefficients can also severely affect the transmitter.