Selection of fiber optical sensor
- Determine the sensing distance; It needs to be used with the amplifier;
- Working type: through-beam fiber optic sensor, reflective type, area fiber optic sensor;
- The comparison between the measured section of the detected object and the spot size of the photoelectric sensor when it is in a stable working state; the optical fiber sensor has the characteristics of small detection spot;
- Output type, PNP/ NPN; which is related to PLC. PNP model is mainly used in Europe, such as Siemens, and NPN is mainly used in Asia; It is absolute, but just as reference.