The measuring system comprises a jacket holder unit (1), a water-cooled jacket (2), a measuring lance (3), a replaceable redox sensor (4), and an oxygen sensor interface (5). This relatively simple and robust construction allows a large freedom in the choice of the measuring location. It is an ideal tool for in-line measurement in feeder, working end or fore-hearth.
The sensor is easily connected to the contact block on the measuring lance. The water-cooled jacket is positioned in the furnace so that the lower end is just above the glass melt level. The redox sensor extends partially out of the water-cooled jacket with its measuring tip immersed in the glass melt.