Hydrogen Probe The whole set including steel tube, terminals, plastic insert, sand body (sand probe), and so on. 1.With rapid speed, high precision 2.Measuring for molten metal Temperature, oxygen and carbon activity Temperature measuring: Range:1450°c-1750°c Tolerance:5°c Measuring Time: no more than 5s Oxygen activity measuring: Range:100-1300ppm Tolerance:10% Measuring Time:<8s Carbon contact measuring: Range: A) when<0.20% Tolerance:0.02% B) when 0.02%-0.05% Tolerance:0.04% C)when>0.05% Tolerance:0.06% Measuring Time:<8s