The DF-150E protects batch quality and significantly improves plant efficiency for a range of reflow application processes by utilizing an advanced coulometric sensing technology that delivers accurate and stable oxygen analysis. Accurate to ±3% of reading/0.5% of measurement range, the DF-150E is highly suitable to control O2 levels in surface-mount soldering operations in reflow PCB ovens. An extremely versatile unit, the DF-150E can be configured to operate as a single or three-range analyzer to meet specific process needs.