An injection-style, zero-hydrocarbon emissions calorimeter from COSA XENTAUR™ / Process Insights that delivers fast, direct measurement of heating value (BTU) and calorific energy in fuel, flare, and process gases. Its flameless design combusts samples in a high-temperature furnace and measures residual oxygen to calculate energy content without adding hydrocarbon fuels, making it ideal for flare monitoring, fuel optimization, and gas quality control across industrial applications.