Metallurgy & Steel Gas Analysis Solutions

Converter off-gas is %vol-range CO / CO₂ / H₂ at up to 1700 °C flame with heavy dust loading. NDIR delivers the right dynamic range on a robust optical head, the dust-tolerant sample system is mature, and multi-channel filter designs give simultaneous CO / CO₂ from one instrument. TDLAS and FTIR are over-qualified for this duty; plain NDIR is the correct match.

Coke-oven gas carries H₂S plus COS, CS₂, organic sulfur, and aromatic hydrocarbons. In-situ cross-stack TDLAS (ZS8300-H2S class) reads H₂S directly across the process duct with high selectivity against heavier sulfur species and hydrocarbons — no extractive sample train or consumable; electrochemical H₂S sensors handle the %-LEL safety alarm duty at lower cost but with consumable-cell lifetime constraints. For process-grade speciated sulfur, route to total-sulfur analysis separately.

Yes, for cylinder-bank and welding-gas manifold purity verification ahead of cutting / welding stations. ZS8100-C2H2 is the TDLAS acetylene analyzer; it shares the sample-conditioning architecture with the HF / HCl family and can be specified on the same skid.

Paramagnetic O₂ (ZS8100-O2 class) delivers ±0.05 %vol at 0–25 %vol range with 5 s T90, which is adequate for closed-loop burner trim. Zirconia O₂ gives faster T90 and runs directly in hot wet flue without a dryer but with lower absolute accuracy. The right choice depends on whether the loop prioritizes accuracy (paramagnetic) or response speed (zirconia).

Beyond the regulated stack CEMS, an integrated steel or metallurgical works runs several process-gas measurements tied to the furnaces themselves: blast-furnace top gas (CO / CO₂ / H₂ for reduction efficiency), BOF converter off-gas (CO for energy recovery and explosion safety), coke-oven gas (H₂S, NH₃, and calorific components), plus reducing-atmosphere control on annealing lines. Foundry and smelting operations add furnace-atmosphere O₂ and CO monitoring for melt quality and worker safety. Each routes to a technology suited to the matrix — NDIR for CO / CO₂, TCD for H₂, paramagnetic / zirconia for O₂, in-situ TDLAS for H₂S. For the gasification or coal-gas composition side of a works, the syngas analysis line carries that measurement.