Optical fluid sensors for cross contamination control systems

A fuel sensor comprising:

• a light source optically coupled to an enclosed volume and configured to emit UV light and at least one of IR or visible light into the enclosed volume;
• a detector optically coupled to the enclosed volume and configured to output a signal proportional to an intensity of one or more wavelengths of IR or visible light received by the detector;
• a processor;
• one or more memory modules communicatively coupled to the processor;
• and
• machine readable instructions stored in the one or more memory modules that cause the optical fluid sensor to perform at least the following when executed by the processor:
• transmit a control signal to the light source to cause the light source to emit IR or visible light into the enclosed volume;
• receive IR or visible light at the detector;
• process the IR or visible light received at the detector to determine an intensity of the received IR or visible light;
• compare the intensity of the received IR or visible light to a threshold intensity;
• determine that a fluid is present in the enclosed volume based on the comparison;
• transmit another control signal to the light source to cause the light source to emit UV light into the enclosed volume, which causes the fluid to fluoresce visible light;
• receive the fluoresced visible light at the detector;
• process the fluoresced visible light received at the detector to determine wavelength and intensity information for the fluoresced visible light;
• compare the wavelength and intensity information for the fluoresced visible light to the one or more fluid profiles stored in the one or more memory modules, wherein each of the one or more fluid profiles comprises information on one or more fluorescent properties of the fluid;
• and
• determine a fluid type of the fluid in the enclosed volume based on the comparison.