Fast growing market demand for renewable energy sources and incentives to generate biogas from waste has put suppliers and operators of biogas upgrading plants under increasing pressure to accept a diverse range of feedstocks. This leads to unpredictable levels of volatile organic compounds (VOCs) in the gas that can significantly impact the efficiency and up-time of the plant. Where biomethane is being injected to the gas grid, the commercial penalties and risks can be severe if purity levels are not consistently met. BioSpec VOC accurately monitors individual ketones and terpenes as well as hydrogen sulphide, ammonia and other components. This gives operators a clear, accurate and real-time picture of the removal of the VOCs from the biogas and enables the upgrading plant to be managed more efficiently. Advanced optical absorption spectroscopy technology is used to analyse all the individual VOC components in a single measurement.