--- title: Steel and Heat Treatment Gas Analysers | Sarvesh url: https://www.sarveshanalytics.com/industries/steel-metals-heat-treatment-gas-analysers.html description: Gas analysers for steel plant process gases, heat treatment furnace atmospheres and float glass baths: CO, CO2, H2, O2 and dew point with probes for hot gas. updated: 2026-11-03 source: html --- Industry # Gas analysers for steel plants, heat treatment and furnace atmospheres Steel plants run on gases that are valuable, toxic and explosive in turn, and heat treatment lines live or die by furnace atmosphere. Sarvesh supplies the analysers, heated and high-temperature probes and sampling systems for both. Quick answer Steel plants and furnace lines use ACCURRA-S for oxygen, CO, CO2 and dew point, ACCURRA-TCD for hydrogen, ACCURRA-Zr for combustion zones, and heated or retractable probes for hot, dusty gas. Corrosive or toxic streams are reviewed before a system is proposed. Updated 3 November 2026 ยท Figures from Sarvesh datasheets What matters here ## What steel, heat treatment and furnaces plants need from gas analysis - Trace oxygen and dew point on one sample for protective atmospheres - Hydrogen in nitrogen by thermal conductivity, no reference gas - CO, CO2 and O2 in steel plant gases, with probes to 1400 C - Systems sized for the sample and the area classification Two different problems sit under this heading. In steel making, the gas is hot, dirty and hazardous, so the probe and conditioning decide whether an analyser stays in service. In heat treatment and glass, the atmosphere is clean but must be controlled at ppm or percent level, and the main risk is a leak or a drifting gas supply. Flammable, toxic and corrosive samples are outside the standard limits of our i-Cons conditioner and SGI-320. We review each stream before proposing a system, and ask for the composition first. Applications ## Major applications in Steel, heat treatment and furnaces These are the applications we are asked about most, not the full list. We add more regularly, and we engineer for bespoke applications too. If yours is not here, contact us. [ ### Heat-treatment furnace atmosphere The atmosphere in a furnace decides surface quality. Read more ](https://www.sarveshanalytics.com/applications/heat-treatment-furnace-atmosphere.html)[ ### Steel plant process gases Steel plant gases are valuable fuels, toxic in leaks and explosive in the wrong mix. Read more ](https://www.sarveshanalytics.com/applications/steel-plant-process-gas-analysis.html)[ ### Float glass bath atmosphere A float glass tin bath runs under nitrogen with a small share of hydrogen to keep the tin from oxidising. Read more ](https://www.sarveshanalytics.com/applications/float-glass-bath-and-furnace-atmosphere.html)[ ### Cold rolling mill furnaces Annealing and heat treatment furnaces in a cold rolling mill are controlled on three readings: oxygen, hydrogen and trace moisture. Read more ](https://www.sarveshanalytics.com/applications/cold-rolling-mill-furnace-atmosphere.html)[ ### Powder metallurgy and metal injection moulding sintering Sintering atmospheres are hydrogen or hydrogen-nitrogen mixtures with a dew-point target. Read more ](https://www.sarveshanalytics.com/applications/powder-metallurgy-and-metal-injection-moulding-sintering.html)[ ### Aluminium controlled-atmosphere brazing furnaces CAB lines need very low oxygen and dew point in the nitrogen atmosphere; a dual analyser reads both from one tapping. Read more ](https://www.sarveshanalytics.com/applications/aluminium-controlled-atmosphere-brazing-furnaces.html)[ ### Bright annealing of copper tube, stainless steel and wire Hydrogen-nitrogen atmospheres and dew point set surface finish. Read more ](https://www.sarveshanalytics.com/applications/bright-annealing-of-copper-tube-stainless-steel-and-wire.html)[ ### Carburising and endothermic gas carbon potential Endogas composition drives carbon potential; CO, CO2 and CH4 readings back up the probe. Read more ](https://www.sarveshanalytics.com/applications/carburising-and-endothermic-gas-carbon-potential.html)[ ### Continuous annealing and galvanising line atmospheres (HNX) Hydrogen in nitrogen at a few percent is a classic binary measurement. Read more ](https://www.sarveshanalytics.com/applications/continuous-annealing-and-galvanising-line-atmospheres-hnx.html)[ ### Foundry cupola and melting furnace gas Cupola gas composition guides blast and heat recovery. Read more ](https://www.sarveshanalytics.com/applications/foundry-cupola-and-melting-furnace-gas.html) Recommended products ## Products for this industry [ ### ACCURRA-S Online analyser for trace, percent and purity O2, CO, CO2, CH4 and dew point; can measure two gases from one sample. View ACCURRA-S ](https://www.sarveshanalytics.com/safe-gas-analyser.html)[ ### ACCURRA-TCD Thermal conductivity analyser for binary mixtures of H2, He, Ar, N2 and others, with no reference gas. View ACCURRA-TCD ](https://www.sarveshanalytics.com/binary-tcd-thermal-conductivity-analysers.html)[ ### ACCURRA-Zr Zirconia percent O2 analyser for furnaces and boilers, single-point air calibration, options to 1400 C. View ACCURRA-Zr ](https://www.sarveshanalytics.com/flue-gas-analysers.html)[ ### SP and SRP sample probes Heated and non-heated probes with blowback, and retractable probes, in SS316, Inconel or ceramic. View SP and SRP sample probes ](https://www.sarveshanalytics.com/sample-probes.html)[ ### ACCURRA-Hz Process gas analyser in an enclosure certified for Gas Group IIC, Zone 1 and 2, T6. View ACCURRA-Hz ](https://www.sarveshanalytics.com/hazardous-gas-analysers.html)[ ### Headline filters Particulate, coalescing and PTFE membrane filters from Headline Filters, UK, for analyser protection. View Headline filters ](https://www.sarveshanalytics.com/headline-filters.html)[ ### i-Cons Smart Peltier sample conditioner with diagnostics, auto blowback and Modbus, in a compact 19 inch cabinet. View i-Cons ](https://www.sarveshanalytics.com/smart-systems-for-gas-analyser.html)[ ### SGI-300 / SGI-320 Peltier sample cooler with integrated pump, filter and condensate detector; SGI-320 for emission monitoring. View SGI-300 / SGI-320 ](https://www.sarveshanalytics.com/sample-coolers.html) Questions ## Frequently asked questions **Can you analyse blast furnace and coke oven gas?** Yes, with a probe and conditioning sized to the dust, tar and corrosives in your stream. Send the composition and we will review it before proposing. **What do you measure in a furnace atmosphere?** Trace oxygen, dew point, hydrogen percentage, and CO and CO2, depending on the atmosphere.