--- title: Sarvesh Analytics | Online Gas Analysers Made in India url: https://www.sarveshanalytics.com/ description: Sarvesh Analytics designs and builds online process gas analysers, smart sample conditioning and filtration in Pune. ACCURRA and i-Cons, since 2002. updated: 2026-11-03 source: html --- # Accurate gas analysis. *Built for uptime.* Online gas analysers and the sample handling that keeps them honest. Designed, built and supported from our own factory in Pune, for plants where the reading has to be right. I need to measure [Oxygen](https://www.sarveshanalytics.com/analyser-selector.html?gas=oxygen) [Dew point](https://www.sarveshanalytics.com/analyser-selector.html?gas=moisture) [Hydrogen](https://www.sarveshanalytics.com/analyser-selector.html?gas=H2) [CO](https://www.sarveshanalytics.com/analyser-selector.html?gas=co) [CO2](https://www.sarveshanalytics.com/analyser-selector.html?gas=co2) [Methane](https://www.sarveshanalytics.com/analyser-selector.html?gas=methane) [Flue gas O2](https://www.sarveshanalytics.com/analyser-selector.html?gas=flue) [In a hazardous area](https://www.sarveshanalytics.com/analyser-selector.html?area=haz) [Something else](https://www.sarveshanalytics.com/analyser-selector.html) [](https://www.sarveshanalytics.com/safe-gas-analyser.html) Safe-area analyser[ACCURRA-S](https://www.sarveshanalytics.com/safe-gas-analyser.html) Trace, percent and purity on one 19-inch platform. Two gases can share one enclosure. [](https://www.sarveshanalytics.com/hazardous-gas-analysers.html) Zone 1 and 2 · Gas Group IIC[ACCURRA-Hz](https://www.sarveshanalytics.com/hazardous-gas-analysers.html) Measures inside the classified area, in a flameproof enclosure. Calibrate without opening the covers. [](https://www.sarveshanalytics.com/flue-gas-analysers.html) Boilers, furnaces and stacks[ACCURRA-Zr](https://www.sarveshanalytics.com/flue-gas-analysers.html) Flue gas oxygen from 0.1 to 21 %. Calibration needs only air. [](https://www.sarveshanalytics.com/oxygen-transmitter.html) Hazardous-area field transmitter[INFINITY-Tx](https://www.sarveshanalytics.com/oxygen-transmitter.html) Percent oxygen or trace CO, measured and transmitted at the sample point. [](https://www.sarveshanalytics.com/smart-systems-for-gas-analyser.html) Smart sample conditioning[i-Cons](https://www.sarveshanalytics.com/smart-systems-for-gas-analyser.html) Cooler, pumps, filter, sensors and controller in one 19-inch enclosure. [](https://www.sarveshanalytics.com/sample-coolers.html) Sample gas cooler[SGI-300](https://www.sarveshanalytics.com/sample-coolers.html) Cools the sample to 5 °C, with drain pump, fine filter and condensate sensor built in. [ ACCURRA-S](https://www.sarveshanalytics.com/safe-gas-analyser.html) [ ACCURRA-Hz](https://www.sarveshanalytics.com/hazardous-gas-analysers.html) [ ACCURRA-Zr](https://www.sarveshanalytics.com/flue-gas-analysers.html) [ INFINITY-Tx](https://www.sarveshanalytics.com/oxygen-transmitter.html) [ i-Cons](https://www.sarveshanalytics.com/smart-systems-for-gas-analyser.html) [ SGI-300](https://www.sarveshanalytics.com/sample-coolers.html) **120+** Organisations supplied, from refineries to ISRO **0.1 ppm** Resolution on trace oxygen, ACCURRA-S 3015 **−80 °C** Dew point measured by ACCURRA-S M015 **T90 < 10 s** Response of ACCURRA-TCD The measurement path ## The reading is only as good as the sample that reaches the sensor. Most analyser trouble starts upstream of the analyser. We design and build every stage of the path, so there is one team to call. ### Extract a representative sample Sample probes in SS316, Inconel and ceramic, with a separate blowback line and heated filters for tarry gas. The retractable SRP-400 lets you service the probe under process pressure, without a shutdown. - [Sample probes](https://www.sarveshanalytics.com/sample-probes.html) - [Retractable probe](https://www.sarveshanalytics.com/retractable-sample-probe.html) ### Cool, dry and supervise the sample i-Cons puts the pump, Peltier cooler, filter, condensate and flow sensors, blowback and heated-line control in one cabinet, and warns before a fault becomes a wrong reading. Vaporisers handle cryogenic and wet samples. - [i-Cons and SGI-320](https://www.sarveshanalytics.com/smart-systems-for-gas-analyser.html) - [SGI-300 cooler](https://www.sarveshanalytics.com/sample-coolers.html) - [Vaporisers](https://www.sarveshanalytics.com/sample-vaporisers.html) ### Protect the analyser We are the exclusive Indian representative of Headline Filters, UK: particulate, coalescing and PTFE membrane elements and housings, up to 700 bar and 500 °C, to keep dust, liquid and oil away from analysers, valves and regulators. - [Headline filters](https://www.sarveshanalytics.com/headline-filters.html) - [Sampling components](https://www.sarveshanalytics.com/sampling-components.html) ### Measure with the right method ACCURRA-S for oxygen, CO, CO₂, methane and moisture. ACCURRA-TCD for hydrogen, helium and argon, with no reference gas. ACCURRA-Hz and INFINITY-Tx for hazardous areas, and ACCURRA-Zr in the flue duct. - [ACCURRA-S](https://www.sarveshanalytics.com/safe-gas-analyser.html) - [ACCURRA-TCD](https://www.sarveshanalytics.com/binary-tcd-thermal-conductivity-analysers.html) - [ACCURRA-Hz](https://www.sarveshanalytics.com/hazardous-gas-analysers.html) - [ACCURRA-Zr](https://www.sarveshanalytics.com/flue-gas-analysers.html) 4–20 mA Dual range Modbus RTU Failsafe relays Calibration history ### Deliver data you can trust Isolated, user-ranged 4–20 mA outputs, failsafe alarm relays, Modbus RTU and stored calibration and alarm history, so the reading reaches your control system with a record of how it was made. - [How to design a sample system](https://www.sarveshanalytics.com/learn/how-to-design-a-gas-sample-handling-system.html) - [Datasheets](https://www.sarveshanalytics.com/downloads.html) Products ## Every part of the measurement, from one maker. The analyser and the sample system that feeds it are designed by the same engineers, so they work as one measurement. Pick a family for ranges, performance and datasheets. - [ Safe area**ACCURRA-S** O₂, CO, CO₂, CH₄ and dew point, from ppm to purity. Two gases in one enclosure if you need them. *Trace to 100 %**Dual gas**Modbus RTU*](https://www.sarveshanalytics.com/safe-gas-analyser.html) - [ Safe area · Binary gas**ACCURRA-TCD** H₂, He, Ar, N₂ and N₂O by thermal conductivity, with no sealed reference and no reference gas. *T90 below 10 s**Drift below 1 %/week*](https://www.sarveshanalytics.com/binary-tcd-thermal-conductivity-analysers.html) - [ Hazardous area**ACCURRA-Hz** O₂, CO, CH₄ and H₂ in classified areas, calibrated without opening the covers. *IIC, Zone 1 and 2, T6**Remote operation*](https://www.sarveshanalytics.com/hazardous-gas-analysers.html) - [ Flue gas**ACCURRA-Zr** Zirconia oxygen for boilers and furnaces, with the sensor protected outside the duct. *0.1 to 21 % O₂**Air calibration**Auto blowback*](https://www.sarveshanalytics.com/flue-gas-analysers.html) - [ Hazardous area · Field**INFINITY-Tx** Two-wire, loop-powered transmitter for percent O₂ and trace CO, mounted at the process. *Loop powered**Low-flow samples*](https://www.sarveshanalytics.com/oxygen-transmitter.html) - [ Sample handling**i-Cons and sampling** Smart Peltier conditioner, coolers, probes, vaporisers and Headline filters for a sample you can trust. *Plug and play**Modbus diagnostics*](https://www.sarveshanalytics.com/sampling-components.html) [All products and specifications](https://www.sarveshanalytics.com/products.html) ·[Not sure which? Use the analyser selector](https://www.sarveshanalytics.com/analyser-selector.html) ·[Datasheets](https://www.sarveshanalytics.com/downloads.html) Trusted in the field ## Plants and institutions that rely on Sarvesh. A selection of the organisations we have supplied. [See more](https://www.sarveshanalytics.com/applications.html#customers). Industries ## Built for the processes that cannot afford a wrong number. Each application page gives the measurement, the analyser and range, and the sampling it needs. If yours is not listed, send us the process details: we also engineer bespoke applications. - [ Air separation and industrial gases Oxygen purity in air separation plants · Medical oxygen plant purity monitoring · Nitrogen purity and trace oxygen · Dew point and trace moisture in process gases →](https://www.sarveshanalytics.com/industries/industrial-gas-plant-gas-analysers.html) - [ Hydrogen and new energy Hydrogen purity · Electrolyser safety and quality · Biogas and compressed biogas (CBG) · Chlor-alkali hydrogen stream: oxygen in hydrogen →](https://www.sarveshanalytics.com/industries/hydrogen-new-energy-gas-analysers.html) - [ Power, boilers and emissions Boiler and furnace oxygen (flue gas) · Stack and emission monitoring · Thermal oxidiser and scrubber efficiency · Cement kiln and precalciner O2 and CO →](https://www.sarveshanalytics.com/industries/power-plant-emission-monitoring-gas-analysers.html) - [ Steel, heat treatment and furnaces Heat-treatment furnace atmosphere · Steel plant process gases · Float glass bath atmosphere · Cold rolling mill furnaces →](https://www.sarveshanalytics.com/industries/steel-metals-heat-treatment-gas-analysers.html) - [ Pharma, chemicals and petrochemicals Nitrogen blanketing and inerting · Reactors, hydrogenation and polymerisation · Closed-loop dryers and spray dryers · Fermenter and bioreactor off-gas →](https://www.sarveshanalytics.com/industries/pharmaceutical-chemical-petrochemical-gas-analysers.html) - [ Electronics, cable and research Semiconductor and electronics gas purity · Optical fibre and cable manufacturing · Welding and laser gas mixtures · Aerospace, nuclear and research laboratories →](https://www.sarveshanalytics.com/industries/electronics-cable-research-gas-analysers.html) - [ Food, agriculture and cold chain Controlled-atmosphere (CA and ULO) fruit stores · Fruit ripening rooms · Modified-atmosphere packaging gas mixer verification · Nitrogen supply purity for food and beverage packaging →](https://www.sarveshanalytics.com/industries/food-agriculture-cold-chain-gas-analysers.html) How we work with you ## From the first drawing to the thousandth hour of uptime. C2C ### Concept to Commissioning We start with your process and your sample, then engineer the analyser and sampling system around them, supply it, and see it through commissioning. SHM ### System Health Management After handover our focus stays on support and product health, so the measurement keeps doing its job for the life of the plant. Start where you are ## Get to the right answer faster. [ ### Find your analyser Choose the gas, range, area classification and sample conditions. The selector returns an indicative model and sampling arrangement from our datasheets. Open the selector → ](https://www.sarveshanalytics.com/analyser-selector.html) [ ### Application data sheet The design inputs our engineers work from, online: up to four measurement points, checks as you type, and a printable summary. Start the data sheet → ](https://www.sarveshanalytics.com/application-data-sheet.html) Guides - [**Why ambient pressure and temperature change high-purity oxygen readings** Many oxygen sensors respond to the partial pressure of oxygen, which falls when barometric pressure falls even if the gas is unchanged.](https://www.sarveshanalytics.com/learn/why-ambient-pressure-affects-oxygen-purity-readings.html) - [**What is dew point, and how is it measured in dry gas?** Dew point is the temperature at which moisture in a gas begins to condense.](https://www.sarveshanalytics.com/learn/what-is-dew-point-and-how-is-it-measured.html) - [**How to design a gas sample handling system for an online analyser** A good sample handling system delivers a representative, clean, dry sample at constant pressure and flow.](https://www.sarveshanalytics.com/learn/how-to-design-a-gas-sample-handling-system.html) [All guides and the glossary →](https://www.sarveshanalytics.com/learn/index.html) Next step ## Tell us the gas, the range and the process. We will recommend the analyser and the sampling system that fit, and tell you straight if something else fits better. [Request a quote](https://www.sarveshanalytics.com/contact.html#enquiry)[+91 94 2300 4179](tel:+919423004179)