In most of the conventional inductive debris sensors, the sensing coil is kept outside the hydraulic tube. Hence the sensitivity reduces, drastically, as a function of the thickness of the tube employed. There are designs available with the coil kept inside the tube, but special holes are required to connect it to the measurement unit (MU). This limits the pressure withstanding capacity of the tube. The proposed sensor solves these two problems using the wireless LC sensor approach, wherein the MU is connected to an outer coil (outside the thick tube), and an inner coil is kept inside the tube. As the inner coil is close to the oil, it is highly sensitive to the debris. It requires no electrical connection to the MU. The outer coil is energized from an AC signal at the parallel resonance frequency of the system, drawing minimum current from the source. The change in phase of this current, due to the change in inductance of the inner coil as debris passes, is measured using a phase-sensitive detector. This measurement approach together with the inner coil which is close to the oil helps to achieve high sensitivity and enables monitoring of thick flow tubes. A prototype of the proposed sensor has been developed (inner and outer diameters of 25.4 mm and 80 mm respectively), integrated into a hydraulic circuit, and tested. The output was sensitive to both ferrous and non-ferrous metallic debris. The output showed sufficient information that can be used to distinguish these two types of debris. The proposed sensor is simple in structure, easy to fabricate and install, leading to a low-cost but effective solution for continuous monitoring of metallic debris. The details of the sensor design, development, and evaluation will be presented in the seminar.