Pepperl + fuchs [india] has introduced a wide range of sensors. These come in inductive as well as capacitive types. Inductive sensors are used to detect the presence of metallic objectives and come in any sizes, shapes, sensing ranges and electrical outputs. Capacitive sensors are usable when the object to be detected is not metallic. Thus this type of sensor is offers flexibility in use. For example,it can, be applied in the detection of levels, or as a hand-held switch. The capacitive sensor responds to the conductivity of objects in addition to the value of their dielectric constant. Inductive sensors come in a wide structured range like cylindrical sensors, square-shaped sensors, slot sensors, ring sensors, namur sensors, analogue sensors, sensors with increased operating distance, bus-compatible sensors and positioners for valves. Capacitive sensors come as cylindrical or rectangular sensors.
