TCD 200 TG for binary gas mixtures

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.

AMS TCD 200 TG

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