Is it normal to pick up ethylene readings in ambient air?

There are common, everyday sources of ethylene that can be picked up on by the sensors in your Felix Gas Analyzers. Common sources of ethylene include smoke or exhaust. Furthermore, the ethylene sensors inside of the Felix Gas Analyzers are also sensitive to various volatile organic compounds (VOCs). Various cleaning agents are often a source of VOC readings. If you are inside, it is not uncommon for the ethylene sensors to report readings between 0-0.5ppm of ethylene. If you are outside, drawing clean ambient air (away from traffic, smoke, or other sources of exhaust) it is more typical to see 0.0 ppm readings for ethylene.