Unformatted text preview: sors With capacitive proximity sensors it should be noted that the switching distance is a
function resulting from the type, lateral length and thickness of the material used.
Most metals produce roughly the same value and a number of different values are
listed in respect of other materials. Material Reduction factor All metals 1.0 Water 1.0 Glass 0.3 – 0.5 Plastic 0.3 – 0.6 Cardboard 0.5 – 0.5 Wood (dependent on humidity) 0.2 – 0.7 Oil 0.1 – 0.3 Table 5.1.2: Guide values for reduction factor © Festo Didactic GmbH & Co. KG • FP 1110 63 5. Capacitive proximity sensors 5.2
Technical characteristics The table below lists the key technical data relating to capacitive proximity sensors.
The figures listed in this table are typical examples and merely provide an overview. Parameter Value Object material all materials with dielectric constant >1 Operating voltage 10 – 30 V DC or
20 – 250 V AC Nominal switching distance 5 – 20 mm, max. 60 mm
(usually variable, adjustable via potentiometer) Maximum switching current 500 mA Sen...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.
- Spring '12