In this conversation on The Foundry Podcast, Mukund Pant, Managing Director of Metal Power Analytical, explains what actually happens inside an optical emission spectrometer and why that matters for foundry quality control. He breaks down the real difference between accuracy and precision, how entry-level, mid-range and top-end instruments genuinely differ in performance, and what a foundry should actually evaluate before buying an OES. The conversation also traces Metal Power Analytical’s journey as the first and only Indian company to design, develop and manufacture an optical emission spectrometer, built entirely through in-house research with no technology transfer. For foundry owners, quality managers and metallurgists, this is a practical, technically grounded look at how OES technology works and how to buy it correctly.