Unformatted text preview: tection (IEC 529, DIN 40050) up to IP67 Ambient operating temperature 0 – 60 °C or
-25 – +80 °C Table 6.4.1: Technical data of diffuse sensors As a rule, the sensing width specified in data sheets refers to white cardboard,
whereby the white reverse side of a Kodak grey card CAT 152 7795 is generally used.
The white side of this test card has a constant reflection of 90 % within a spectral
range of approximately 450 – 700 nm. The grey side reflects 18 %. 86 © Festo Didactic GmbH & Co. KG • FP 1110 6. Optical proximity sensors 3 1 Emitter/Receiver (1) 2 Emitting range (2) Response curve (3) For small distances: Small diffuse reflecting surface required.
For large distances: Large back-reflection surface required. Fig. 6.4.2: Response curves of diffuse sensors Advantages of the
diffuse sensor 6.4.3 Notes on application
• Because the reflection on the object activates the receiver, an additional reflector
is not required.
• The object can be diffuse reflecting, mirroring or transparent to translucent as
View Full Document
- Spring '12
- pH, proximity sensors, Festo Didactic GmbH, Festo Didactic GmbH & Co