M-H-900 Hydrogen probe can be used in Ladle, Tundish and Ingot mould. Using Sieverts’ law the hydrogen concentration in liquid metal to be measured can be obtained quickly, typically less than a minute. M-H-900 is a kind of expendable hydrogen sensor which possesses high measuring efficiency, high measuring precision and short response time. It can offer supporting data during the steel making process and guarantees the quality of steel and production efficiency.