Patent ID: 7989780

Claim:
A sensor, comprising: a sensor head having a bottom planar surface, the sensor head comprising: a light source chamber including an ultraviolet (UV) light source that emits a first UV wavelength along a first optical path parallel to the bottom planar surface; a dichroic mirror positioned at a 45 degree angle to the first optical path such that the dichroic mirror reflects the first UV wavelength toward the bottom planar surface along a second optical path perpendicular to the bottom planar surface; a window positioned in the bottom planar surface at a first end of the second optical path that transmits the first UV wavelength into an analytical area containing a sample having an unknown concentration of a chemical that exhibits fluorescent characteristics, wherein the window further transmits fluorescence emissions of the sample having wavelengths greater than a second UV wavelength toward the dichroic mirror along the second optical path, wherein the dichroic mirror transmits the fluorescence emissions of the sample; and a detector chamber including a UV detector positioned at a second end of the second optical path that detects the fluorescence emissions of the sample transmitted by the dichroic mirror; and a controller that calculates the concentration of the chemical in the sample based on the detected fluorescence emission.