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Difference between ferrous product to be detected and non-ferrous product to be detected
Difference between ferrous sensors and non-ferrous sensors
There are sensors which can detect:
Ferrous metals as a preference (steel, iron)
The sensing distances for these products vary according to the metals to be detected: maximum for ferrous and dependent on a Km coefficient typical of each metal (value between 0 and 1: Km = 1 for steel)
This coefficient reduces the sensor detection range. For example if Km = 1 for cast iron, it is only 0.25 for copper.
This is the conventional inductive sensor
Both for ferrous (steel, iron) and non-ferrous (brass, aluminium, copper, etc.) metals
The sensing distance for these sensors is the same for both ferrous and non-ferrous materials. The Km coefficient is always 1
They are called Ferrous/Non-Ferrous sensors.
The Schneider part numbers are: XS1M18KPM40x, XS1M30KPM40x 18 and 30 diameter sensors respectively and XS7C40KPM40
Difference in detection principles
For both sensors, an LC oscillator creates an electromagnetic signal.
The difference in detection principles for the two types of sensor lies in:
Km coefficient depending on the different metals