ACCURRA-TCD measures neon in a binary mixture, such as neon in helium, nitrogen or air, by thermal conductivity with no reference gas. Neon conducts heat about 1.9 times as well as nitrogen; the range is set for your mixture.
Specifications
| Item | Specification | Notes |
|---|---|---|
| Gas | Neon in a binary mixture | |
| Sensor | Platinum thermal conductivity | |
| Repeatability | Below 1 % of full scale | Linearity below 1 % of range |
| Errors and drift | Below 1 % of full scale per week | |
| Response time | T90 below 10 s at 0.6 LPM | |
| Reference gas | Not required | |
| Range | Set for your mixture | Send the background gas and the range you need |
From the current Sarvesh product datasheets and company profile. Specifications may change without notice as products improve. The final responsibility to check that a product meets the process and analyser requirement remains with the customer.
Key features
- Binary neon measurement in helium, nitrogen or air
- Isolated 4-20 mA, programmable alarms and Modbus RTU
- No reference gas, so no reference cylinder to buy or change
How it works
Neon conducts heat about 1.9 times as well as nitrogen, at roughly 49 mW/m.K, and about a third as well as helium. Neon in nitrogen or air, and neon in helium, both give a thermal conductivity sensor a clear signal.
Neon is recovered from air separation plants as a crude neon and helium stream, then purified. Typical uses include excimer laser gas mixtures, lighting and cryogenics. Neon in helium is the natural binary measurement during purification, and neon purity is checked at filling and before blending.
Requirements and limits
- Binary mixtures only; a varying third gas shifts the reading.
- The ACCURRA-TCD datasheet lists neon without a standard range table, so we confirm the range for your mixture before quoting.
Selection guidance
Choose ACCURRA-TCD for neon as the main component of a binary mixture, or for neon in helium during purification. For trace impurities in neon, such as oxygen or moisture, add an ACCURRA-S channel.
Applications
Application pages where this is part of the recommended solution:
- Gas purity certification and cylinder filling
- Welding and laser gas mixtures
- Helium purity and recovery
- Aerospace, nuclear and research laboratories
Compatible products
ACCURRA-TCD
Thermal conductivity analyser for binary mixtures of H2, He, Ar, N2 and others, with no reference gas.
View ACCURRA-TCD
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
Headline Filters
Particulate, coalescing and PTFE membrane filters from Headline Filters, for analyser protection.
View Headline FiltersFrequently asked questions
Can ACCURRA-TCD measure neon?
Yes. Neon is on the ACCURRA-TCD gas list, measured in a binary mixture by thermal conductivity with no reference gas.
Can it measure neon in helium?
Yes, as a binary mixture: helium conducts heat about three times as well as neon, so the signal is strong. Hydrogen in the same stream would interfere; tell us if it can be present.
What accuracy?
Repeatability below 1 percent of full scale, linearity below 1 percent of range, and errors and drift below 1 percent of full scale per week.
Can it measure oxygen or moisture in neon?
Not with the TCD sensor. Trace oxygen and dew point are read on an ACCURRA-S channel in the same sample.