PetroSense is the leading source for TPH (total petroleum hydrocarbons) and BTEX portable and continuous monitoring systems. PetroSense sensors operate in air (vapor), water and soil. These sensors utilize fiber optic systems and are designed for in-situ, real time measurements of TPH and other related pollutants. BTEX Detection and Monitoring PetroSense (FCI Environmental, Inc.) has been a leader in Total Petroleum Hydrocarbon (TPH) and BTEX monitoring systems for almost twenty years. PetroSentry is the only commercially available system that can detect both the presence and concentration of TPH and BTEX in vapor and dissolved in water on a real time basis in field applications. We offer both a portable version for on site spot testing PHA 100 Plus - > petrosense.com