Gas analysers for air separation and industrial gas plants
Industrial gas producers sell purity. Every cylinder, tanker and pipeline delivery rests on an analyser that reads oxygen purity, trace impurities and moisture correctly. Sarvesh builds the ACCURRA-S oxygen purity, trace oxygen and dew point analysers, and the sampling that goes with them, in Pune.
Industrial gas plants use ACCURRA-S for oxygen purity (95 to 100 %), trace oxygen (0 to 1000 ppm), dew point (minus 80 to plus 20 C) and impurity checks, and ACCURRA-TCD for binary purity of H2, He, Ar and N2, with cryogenic vaporisers for liquid samples.
What air separation and industrial gases plants need from gas analysis
- Oxygen purity from 95 to 100 % with built-in ambient pressure and temperature compensation (models 3090 and 3190)
- Trace oxygen from 0 to 1000 ppm and dew point from minus 80 to plus 20 C
- Binary purity of H2, He, Ar, N2, N2O, Ne and Kr with ACCURRA-TCD, no reference gas
- One supplier for the analyser, cryogenic vaporiser, probes and filters
Plants in this sector run the same few measurements over and over: oxygen purity on the product line, trace oxygen on nitrogen and argon, moisture on dry gas, and impurity checks at the filling manifold. The difference between a good and a poor analyser shows up in two places, long-term drift and the effect of ambient conditions on high-purity readings.
Sarvesh addresses the second directly. High-purity oxygen readings move with barometric pressure and temperature, and our purity models correct for both. The rest of the range is built on one platform, so a plant that runs several gases has the same menus, outputs and diagnostics on every analyser.
Major applications in Air separation and industrial gases
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.
Oxygen purity in air separation plants
In an air separation unit the oxygen stream is the product.
Read moreMedical oxygen plant purity monitoring
Medical oxygen is a drug.
Read moreNitrogen purity and trace oxygen
Nitrogen purity is measured as what is left over: a few ppm of oxygen.
Read moreDew point and trace moisture in process gases
A dew point analyser tells you when a dryer bed is spent, a flange is leaking, or a cylinder change has brought moisture into the line.
Read moreGas purity certification and cylinder filling
Every filled cylinder or tanker load is a purity claim.
Read moreLiquid oxygen, nitrogen and argon tanker and bulk-storage quality check
Purity at delivery and at the storage tank decides acceptance.
Read moreArgon recovery and purification
Argon is recovered from steel and ASU off-streams and sold on trace-oxygen and nitrogen limits.
Read moreHelium purity and recovery
Helium for MRI, leak testing and welding is expensive; a purity reading protects the recovery loop.
Read moreDry ice and liquid CO2 plant purity
Beverage and dry-ice CO2 is sold on purity; trace oxygen is a typical limit.
Read moreFood-grade CO2 recovery from distilleries, breweries and fermentation
Recovery plants capture fermentation CO2 and must prove purity before liquefying.
Read moreMedical nitrous oxide purity
Nitrous oxide is on the TCD gas list for binary measurement.
Read moreCompressed-air and instrument-air dew point (ISO 8573)
Compressed-air quality standards set a pressure dew point class; continuous monitoring catches dryer failure.
Read moreMedical-air and breathing-air quality
CO, CO2 and moisture are the usual quality parameters for medical and breathing air.
Read moreLaser-cutting nitrogen and oxygen assist-gas purity
Nitrogen purity affects cut edge quality; job shops monitor generator and bulk supply.
Read moreProducts for this industry
ACCURRA-S 3090
Oxygen purity analyser for 95 to 100 % O2 with ambient pressure and temperature compensation.
View ACCURRA-S 3090ACCURRA-S
Online analyser for trace, percent and purity O2, CO, CO2, CH4 and dew point; can measure two gases from one sample.
View ACCURRA-SSV-200 / SV-400 vaporisers
Sample vaporisers for cryogenic and wet samples with no loss of sample.
View SV-200 / SV-400 vaporisersACCURRA-TCD
Thermal conductivity analyser for binary mixtures of H2, He, Ar, N2 and others, with no reference gas.
View ACCURRA-TCDHeadline filters
Particulate, coalescing and PTFE membrane filters from Headline Filters, UK, for analyser protection.
View Headline filters
ACCURRA-Hz
Process gas analyser in an enclosure certified for Gas Group IIC, Zone 1 and 2, T6.
View ACCURRA-HzFrequently asked questions
Which analyser measures oxygen purity in an air separation plant?
ACCURRA-S 3090 and 3190 measure oxygen purity from 95 to 100 % with ambient pressure and temperature compensation. 3190 uses a paramagnetic sensor.
Do you supply analysers for medical oxygen plants?
Yes. See our medical oxygen plant page for the models for 93 % PSA oxygen and 99 % cryogenic oxygen.