An inductive proximity sensor comprising: a multi-receiver coil assembly comprising: a first receiver having a first and a second terminal; a second receiver having a first and a second terminal, wherein the second receiver is arranged in a differential coil arrangement with the first receiver and wherein the first terminal of each of the first receiver and the second receiver are connected to a common ground; and a transmitter concentrically between and planar with the first receiver and the second receiver, the transmitter being configured to: emit an electromagnetic field; inductively couple with the first receiver to induce a first voltage on the first receiver; and inductively couple with the second receiver to induce a second voltage on the second receiver, wherein the differential coil assembly is configured to generate a signal based on the first voltage and the second voltage; and an evaluator circuit configured to receive the signal from the multi-receiver coil assembly, wherein the evaluator circuit comprises: a first resistor (21, 23) and a second resistor (21, 23), each of the first and second resistors having a first and a second terminal, wherein the second terminal of the first receiver is connected to the first terminal of the first resistor and the second terminal of the second receiver is connected to the first terminal of the second resistor, the second terminal of the first resistor being connected to the second terminal of the second resistor at a node; a filter configured to filter noise from the signal received via the node; an amplifier configured to amplify the filtered signal; and an output circuit configured to determine a change in the amplified signal and indicate a detected target based on a comparison of the change with a threshold. a multi-receiver coil assembly comprising: a first receiver having a first and a second terminal; a second receiver having a first and a second terminal, wherein the second receiver is arranged in a differential coil arrangement with the first receiver and wherein the first terminal of each of the first receiver and the second receiver are connected to a common ground; and a transmitter concentrically between and planar with the first receiver and the second receiver, the transmitter being configured to: emit an electromagnetic field; inductively couple with the first receiver to induce a first voltage on the first receiver; and inductively couple with the second receiver to induce a second voltage on the second receiver, wherein the differential coil assembly is configured to generate a signal based on the first voltage and the second voltage; and a first receiver having a first and a second terminal; a second receiver having a first and a second terminal, wherein the second receiver is arranged in a differential coil arrangement with the first receiver and wherein the first terminal of each of the first receiver and the second receiver are connected to a common ground; and a transmitter concentrically between and planar with the first receiver and the second receiver, the transmitter being configured to: emit an electromagnetic field; inductively couple with the first receiver to induce a first voltage on the first receiver; and inductively couple with the second receiver to induce a second voltage on the second receiver, wherein the differential coil assembly is configured to generate a signal based on the first voltage and the second voltage; and emit an electromagnetic field; inductively couple with the first receiver to induce a first voltage on the first receiver; and inductively couple with the second receiver to induce a second voltage on the second receiver, wherein the differential coil assembly is configured to generate a signal based on the first voltage and the second voltage; and an evaluator circuit configured to receive the signal from the multi-receiver coil assembly, wherein the evaluator circuit comprises: a first resistor (21, 23) and a second resistor (21, 23), each of the first and second resistors having a first and a second terminal, wherein the second terminal of the first receiver is connected to the first terminal of the first resistor and the second terminal of the second receiver is connected to the first terminal of the second resistor, the second terminal of the first resistor being connected to the second terminal of the second resistor at a node; a filter configured to filter noise from the signal received via the node; an amplifier configured to amplify the filtered signal; and an output circuit configured to determine a change in the amplified signal and indicate a detected target based on a comparison of the change with a threshold. a first resistor (21, 23) and a second resistor (21, 23), each of the first and second resistors having a first and a second terminal, wherein the second terminal of the first receiver is connected to the first terminal of the first resistor and the second terminal of the second receiver is connected to the first terminal of the second resistor, the second terminal of the first resistor being connected to the second terminal of the second resistor at a node; a filter configured to filter noise from the signal received via the node; an amplifier configured to amplify the filtered signal; and an output circuit configured to determine a change in the amplified signal and indicate a detected target based on a comparison of the change with a threshold.