--- title: Pharma and Chemical Process Gas Analysers | Sarvesh url: https://www.sarveshanalytics.com/industries/pharmaceutical-chemical-petrochemical-gas-analysers.html description: Oxygen analysers for blanketing, reactors, hydrogenation and dryers, O2 and CO2 for fermenters, and syngas analysis, in safe and hazardous areas. updated: 2026-11-03 source: html --- Industry # Gas analysers for pharma, chemical and petrochemical plants Solvents, fine powders, live cultures and hydrogenation loops all depend on controlling the gas around them. Sarvesh supplies trace and percent oxygen analysers, hazardous-area ACCURRA-Hz and INFINITY-Tx units, and dual-gas fermenter analysers, with calibration and alarm history for audit. Quick answer Pharma and chemical plants use ACCURRA-S for ppm and percent oxygen and for O2 and CO2 in fermenter off-gas, and ACCURRA-Hz or INFINITY-Tx in classified areas. Calibration and alarm history is stored in the analyser and protected by passwords. Updated 3 November 2026 ยท Figures from Sarvesh datasheets What matters here ## What pharma, chemicals and petrochemicals plants need from gas analysis - Trace oxygen from 0 to 1000 ppm for inert gas blanketing - Hazardous-area oxygen analysers and a two-wire transmitter - O2 and CO2 in one enclosure for fermenter off-gas - Password protection and calibration history for audit trails In regulated plants the analyser is both a safety device and a record. ACCURRA-S saves calibration, alarm and fault records, and password protection stops unauthorised changes to calibration and set-up, which supports the documentation your quality system asks for. Many process areas are classified. We supply ACCURRA-Hz in an enclosure certified for Gas Group IIC, Zone 1 and 2, T6, and INFINITY-Tx as a loop-powered field transmitter. Applications ## Major applications in Pharma, chemicals and petrochemicals 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. [ ### Nitrogen blanketing and inerting Blanketing keeps oxygen out of tanks that hold solvents or oxygen-sensitive product. Read more ](https://www.sarveshanalytics.com/applications/nitrogen-blanketing-and-inerting.html)[ ### Reactors, hydrogenation and polymerisation Hydrogenation, polymerisation and sweetening units run under pressure with flammable feed, and a few ppm of oxygen can poison a catalyst or create an explosive mix. Read more ](https://www.sarveshanalytics.com/applications/chemical-reactor-hydrogenation-trace-oxygen.html)[ ### Closed-loop dryers and spray dryers Dryers that handle solvent-wet product run inert. Read more ](https://www.sarveshanalytics.com/applications/closed-loop-and-spray-dryer-oxygen-safety.html)[ ### Fermenter and bioreactor off-gas The oxygen and carbon dioxide in a fermenter's exhaust show how the culture is growing. Read more ](https://www.sarveshanalytics.com/applications/fermenter-and-bioreactor-off-gas.html)[ ### Pyrolysis, gasification and syngas Gasification and pyrolysis produce a gas of CO, hydrogen, methane and CO2 whose composition changes with feed and conditions. Read more ](https://www.sarveshanalytics.com/applications/pyrolysis-gasification-and-syngas.html)[ ### Autoclaves An oxygen reading on an autoclave confirms inerting and supports safety monitoring. Read more ](https://www.sarveshanalytics.com/applications/autoclave-oxygen-measurement.html)[ ### Flare-gas recovery oxygen ingress Flare recovery can pull air into the gas header; oxygen monitoring protects downstream systems. Read more ](https://www.sarveshanalytics.com/applications/flare-gas-recovery-oxygen-ingress.html)[ ### Dust-collector, mill and silo inerting Inerted dust systems are held below a set oxygen level. Read more ](https://www.sarveshanalytics.com/applications/dust-collector-mill-and-silo-inerting.html)[ ### Solvent-recovery and distillation columns under inert gas Solvent vapour needs an oxygen reading in vent and blanket lines. Read more ](https://www.sarveshanalytics.com/applications/solvent-recovery-and-distillation-columns-under-inert-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-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)[ ### INFINITY-Tx Loop-powered two-wire transmitter for percent O2 and trace CO in hazardous areas. View INFINITY-Tx ](https://www.sarveshanalytics.com/oxygen-transmitter.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)[ ### 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)[ ### 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)[ ### 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 **Do your analysers help with data integrity requirements?** They provide password-protected set-up and calibration, calibration and alarm history, and Modbus RTU output to your historian. Compliance of your system as a whole remains with you. **Which analyser for oxygen in nitrogen blanketing?** ACCURRA-S 3015 for ppm levels, 3030 or 3130 for percent, and ACCURRA-Hz or INFINITY-Tx in hazardous areas.