For measurement of binary gas mixtures AMS offers the Thermal Conductivity Analyser TCD 200 TG.
The measuring principle of Thermal Conductivity uses the different thermal conductivity of gases. The gas analysis through thermal conductivity for the measurement of gas components is a common method since the early 20th. century.
Typical applications are the measurement of:
- Hydrogen in Nitrogen
- Hydrogen in Helium
- Argon in Nitrogen or Oxygen
The main advantage of the Thermal Conductivity Analyser TCD 200 TG is the speed of the measurement. Due to the extremely low thermal mass of the sensor, T-90 Times of less than 10 Seconds at a gas flow of 50 Nl/H can be reached.
Typical gas mixtures for the use of the Thermal Conductivity Analyser TCD 200 TG are:
| Sample gas | Associated gas | Measuring range |
|---|---|---|
| H2 | N2 or air | 0 … 0,5 Vol. % |
| H2 | N2 or air | 0 … 100 Vol. % |
| H2 | N2 or air | 98 … 100 Vol. % |
| H2 | Ar | 0 … 0,3 Vol. % |
| H2 | He | 20 … 100 Vol. % |
| He | N2 or air | 0 … 0,8 Vol. % |
| He | N2 or air | 0 … 100 Vol. % |
| He | N2 or air | 97 … 100 Vol. % |
| Ar | N2, O2 or air | 0 … 3 Vol. % |
| Ar | N2, O2 or air | 96 … 100 Vol. % |
| Ar | N2, O2 or air | 0 … 100 Vol. % |
| CH4 | N2 or air | 0 … 3 Vol. % |
| CH4 | N2 or air | 96 … 100 Vol. % |
| CH4 | N2 or air | 0 … 100 Vol. % |
Technical data
| Measuring system | TCD 200 TG |
|---|---|
| Measuring principle | Thermal Conductivity |
| Measuring range | Depending on gas composition i. e. H2 / N2, CO2 / N2, CH4 / N2, Ar / N2 |
| Analogue output port | 0 … 10 V, (0) 4 … 20mA |
| Reproducability | < 1 % of measuring range |
| Resolution | 0,1 % of measuring range, or 0,01 Vol. % depending on gas concentration |
| T-90 Time | < 10 Sec. at a flow of 50 Nl / h |
| Longterm drift | < 1 % of the smallest measuring range per month |
| Display | 2 x 16 digit LCD Display |
| Messages | 2 freely programmable messages with reference to the gas concentration |
| Gasanschluss | Eingang / Ausgang 3 / 6 mm Klemmringverschraubung |
| Gas sampling | integrated gas inlet valve Gas flow meter |
| Sample gas flow | min. 25 Nl/h, max. 50 Nl/h |
| Sample gas pressure | min. 1,01 bar abs., max. 2 bar abs. |
| Sample gas temperature | 5 °C bis + 45 °C |
| Ambient temperature | 5 °C bis + 45 °C |
| Relative humidity | 0 … 99 % not condensing |
| Power supply | 24 VDC |
| Protection class / Housing / | IP 20 / electronics unit, 28 TE / 3HU |
| Dimentsions | IP 65 / wall mounting housing / ca. 300 x 260 x 130 mm (hxbxt) IP 54 / portable housing 42 TE / 3 HU IP 54 / panel mounting 144 x 144 mm |
| Weight | 2-5 kg |
| Options | inert gas purging for preventing hazardous atmosphere inside housing pressure reducer (max 10 bar in, 50 mbar out) particle filter 2 µm 5 way valve electrical/pneumatical pump electronic flow monitoring /-alarm |
| Version: TCD200TG-E V-2013-07 |