Core Insights - The price difference between B-type and S-type platinum-rhodium wires is significant, exceeding 100 yuan per gram, primarily due to the differences in platinum and rhodium composition [1][3]. Composition and Application - S-type platinum-rhodium wire has a composition of 10% rhodium and 90% platinum for the positive electrode, and pure platinum for the negative electrode, making it suitable for mid-temperature measurement applications in industries like glass manufacturing and ceramic sintering [3]. - B-type platinum-rhodium wire features a more complex composition with 30% rhodium and 70% platinum for the positive electrode, and a platinum-rhodium alloy (6% rhodium) for the negative electrode, allowing it to perform well in ultra-high temperature environments above 1600℃, making it essential for aerospace and metallurgy industries [3]. Market Pricing - Current market prices indicate that S-type platinum-rhodium wire is valued at 330 yuan per gram, while B-type platinum-rhodium wire reaches 453 yuan per gram, reflecting the direct correlation between material composition and market value [4]. - The higher rhodium content in B-type wire significantly increases its raw material costs, and the production process is more demanding, requiring precise control of rhodium distribution, which further elevates its market price [3].