Choosing between: inductive sensors, capacitive sensors, photoelectric sensors, ultrasonic sensors
Various technologies can be used for detecting metallic objects depending on the application area:
- Inductive sensors for detecting all metallic objects at close range (< 50 mm).
- Capacitive sensors for detecting the presence or level of almost any material and liquid at close range (< 50 mm).
- Photoelectric sensors in diffuse, retro-reflective or through-beam technology for detecting virtually any object over great distances (> 50 mm) using light.
- Ultrasonic sensors for detecting virtually any object over greater distances (> 50 mm) using sound.