Use ACCURRA-TCD (helium). Helium for MRI, leak testing and welding is expensive; a purity reading protects the recovery loop. Binary only; air ingress shows as a purity drop, not its cause.
The measurement and why it matters
Helium for MRI, leak testing and welding is expensive; a purity reading protects the recovery loop. This is a good fit, with one configuration or sample-handling point to confirm before we quote.
Industrial gas producers, distributors and users all buy and sell on a purity figure. A reading taken continuously, at the point where gas changes hands or enters a process, lets a plant release a batch with confidence instead of waiting for a laboratory result.
Most gas-handling streams are clean, dry and pressurised, which suits the ACCURRA-S sample specification. The points to settle are usually the sample path (vaporised, regulated and vented safely) and whether the stream is a binary mixture, which is the condition for ACCURRA-TCD.
Typical buyers in India: helium recyclers, hospitals with MRI, leak-test houses, gas distributors. Where this matches your plant, send us the gas, range, pressure and temperature at the tapping point and we will confirm the analyser and sample path.
Models and ranges
| Model | Measures | Range | Sensor and notes |
|---|---|---|---|
| ACCURRA-TCD | Binary gas analysis (He) | Binary mixtures | Thermal conductivity, no reference gas |
Process notes
What the analyser reads here
Gases of interest: He. Analyser fit: ACCURRA-TCD (helium).
The table above lists each model with its range; where a row says to confirm the range, we check it against the datasheet for your application before quoting.
What to settle before ordering
Binary only; air ingress shows as a purity drop, not its cause.
We would rather confirm these points at the start than discover them at commissioning, so please include them with your process details.
Related applications
This page overlaps with:
Sampling and installation
- Every ACCURRA-S has an internal fine filter and rotameter. Regulate sample pressure and flow externally; the catalogue recommends about 1 LPM and a sample pressure of 2 to 10 psig.
- Keep sample lines short, clean and dry, and vent the sample somewhere safe.
Send us your process data
The same pre-order design inputs our engineers design from, online. Fill in what you know, leave the rest. Your draft saves as you go, and you can print or send it when ready.
What the data sheet asks for
Send what you have and we will ask for the rest.
- The gases to measure, the range, and the accuracy you need
- Background gases and their typical composition
- Sample temperature, pressure and dew point at the tapping point
- Dust level, and whether the gas carries tar, oil or condensable vapour
- Process connection and, for ducts, the duct diameter
- Where the sample vents to, and at what pressure
- Area classification of the tapping point and of the analyser location, and the IP protection needed
- Distance between the tapping point and the analyser
- Outputs you need: 4-20 mA, dual range, relays, Modbus RTU
- Calibration approach, calibration gas available, and whether blowback is required
- Utilities at site: power supply, instrument air, nitrogen, steam and cooling water, and the ambient temperature range
- Gases and ranges: He
- The point to confirm: Binary only; air ingress shows as a purity drop, not its cause.
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Frequently asked questions
Which analyser suits helium purity and recovery?
ACCURRA-TCD (helium) Helium for MRI, leak testing and welding is expensive; a purity reading protects the recovery loop.
What should I check before ordering for helium purity and recovery?
Binary only; air ingress shows as a purity drop, not its cause.
Who typically needs this?
Typical buyers in India: helium recyclers, hospitals with MRI, leak-test houses, gas distributors.
Can Sarvesh support a variation of this application?
Yes. If your process differs from the usual case, send the details. Application engineering is where we start every project, and bespoke applications are welcome.
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