Due to the growing fields of application especially in extremely harsh environments with highly dynamic measuring movements and high pollution levels the need arises for touchless and non-contacting sensors.
The requirements for a non-contacting transducer / angle sensor are as follows specified:
• Long life even at high speeds and frequencies. For example, a potentiometric sensor for valve stroke in an engine would not be feasible due to wear.
• Long service life in harsh environments such as high degree of contamination and mechanical stress (eg sensors in mobile agricultural machinery)
• Provides a standardized electrical interface.
• Low power consumption (typical: <100mA).
• costs only slightly higher than the potentiometric sensors.