Abstract: A remote detection apparatus to detect an oil pollutant comprises a light emitting module, an optical receiving device including a first lens, a band-pass filter, at least two second lenses and at least an optical fiber configured to receiving a reflected beam, a detector module, and a micro-controller. The apparatus further comprises a house including an optical window configured to protect the light emitting module, the optical receiving device, the detector module, and the micro-controller from harsh environmental conditions.