... determination in ferrous and non-ferrous metals, semiconductors, electronic materials, rare earth materials, ores, ceramics, coal, graphite, and some organic materials ... motor made in Swiss, continuously working;4) IR Emitter: Anti-oxide, stable IR emitter made in US;5) Temperature control: ... mg (coal, representative value)6. Carrier gas:O2: purity ≥99.5%, pressure 0.30 MPa, pressure of furnace end 0 ...