A company seeks a sensor that is sensitive and quantitative for ethane from 5 ppm to 5,000 ppm, and for methane from 5 ppm to 7,000 ppm. The sensor(s) should work in or near oil. While the location of the sensor heads should primarily be positioned in the headspace above the oil, ability to operate in oil could be an added, but not required feature. Sensing must take place at room temperatures. Optical or other types of non-arcing sensors may be desirable because this eliminates most danger from heat, flame, and arcing in what can be an explosive monitoring environment.