Inductive presence or position sensor or detector of the type comprising as its sensitive element and defining a front working plane of the sensor, a coil system forming an air-core transformer arrangement with a primary coil or winding and a secondary coil or winding , said primary coil or winding of said system being associated with a capacitive component in order to constitute a LC oscillating circuit whose oscillation is sustained by an adapted generator in the form of an operational amplifier and an associated resistance arrangement , the sensor also comprising a direct or indirect feedback line from the secondary coil or winding to the input of the operational amplifier of the generator , and signal processing means , fed by at least one signal provided by at least one component of the coil system , the inductive sensor being characterised : in that it is configured to deliver a double detection signal (out 1, out 2) indicative of a combined information of both position and constitutive material of a target object approaching the front working plane of the sensor , said combined information signal (out 1, out 2) being based on two measurement signals provided to the processing means and representative of the two voltages (U1 and U2) respectively at the primary and at the secondary coil or winding (2 and 3), in that the processing means comprise, as components of a signal treatment chain, an adder with two inputs as a first chain component, an AC/DC converter circuit as a second chain component and a comparative circuit as a third chain component, said latter issuing the two logical output signals (out 1, out 2), in that said converter circuit is configured to convert the differential sinusoidal signal outputted by the adder and applied to its input into a constant voltage level proportionate to the input amplitude and said comparative circuit is configured to compare the output signal of the converter circuit with thresholds (Uo1, Uo2) in order to detect the approach of the target object at a distance (Do) from the front working plane , and, in that said comparative circuit is configured to initiate a logic signal at the first output (out 1) with a target of ferrous metal approaching, and at the second output (out 2), with a target of non-ferrous metal approaching. in that it is configured to deliver a double detection signal (out 1, out 2) indicative of a combined information of both position and constitutive material of a target object approaching the front working plane of the sensor , said combined information signal (out 1, out 2) being based on two measurement signals provided to the processing means and representative of the two voltages (U1 and U2) respectively at the primary and at the secondary coil or winding (2 and 3), in that the processing means comprise, as components of a signal treatment chain, an adder with two inputs as a first chain component, an AC/DC converter circuit as a second chain component and a comparative circuit as a third chain component, said latter issuing the two logical output signals (out 1, out 2), in that said converter circuit is configured to convert the differential sinusoidal signal outputted by the adder and applied to its input into a constant voltage level proportionate to the input amplitude and said comparative circuit is configured to compare the output signal of the converter circuit with thresholds (Uo1, Uo2) in order to detect the approach of the target object at a distance (Do) from the front working plane , and, in that said comparative circuit is configured to initiate a logic signal at the first output (out 1) with a target of ferrous metal approaching, and at the second output (out 2), with a target of non-ferrous metal approaching. <EOS>