FID Gas Chromatograph

Principle

The very weak current obtained in this way is ampliﬁed in an electrometer with high gain and directed to a data acquisition system. A polarization electrode is connected on the level of the nozzle and a collecting electrode with adjustable distance make the best results possible. Coupled with a methanizer (UMTR unit), it also detects traces of CO and CO2. The methaniser is foreseen to convert, in a catalytic reactor, traces of CO and CO2 into methane.

This reaction takes place at a temperature of ± 350°C in presence of Hydrogen in excess. With a properly adjusted temperature and ﬂowrate, the efﬁciency is almost of 100%. When supplied with high purity gases, the detection threshold can reach 1 ppb.

Some Global References

Company	Type of analyser	Analyser	Measurement
Air Liquide (Brasil)	Oxygen	FID	Separated CnHm
Air Liquide (Canada)	Oxygen & Air	FID	CH4, NMHC
Air Liquide (Belgium)	Nitrogen	FID	CH4, CO, CO2, NMHC
Linde (Germany)	Oxygen	FID	BTX
ArianeSpace (French Guiana)	Multi gas	FID	CO2, C2H2
Yora (Germany)	Oxygen, Krypton, Xenon	FID	CH4, C2H2, C3H3

Type of configurations

DID Gas Chromatograph - 500

Process Line

This new line 500 has been designed for stand alone operation. Easy configuration and quick start-up make this new system ideal for process gas analysis.

In addition to its user-friendly interface (touch screen display), the new line 500 has its own chromatographic software that allows the concentration of each impurity to be displayed directly. Moreover, the new line 500 can be remotely controlled through Ethernet or Internet.

DID Gas Chromatograph - 600

Laboratory Line

The new line 600 has been designed for working with Chromdyne software on a computer. It make this new system ideal for laboratory process gas analysis. Moreover, the new line 600 can be remotely controlled through Ethernet or Internet.

Technical Specifications

Accuracy	Depend of the range used
Drift	1 % over 24 hours
Temperature drift	1 % per degree
Operating temperature	± 20°C without wide variations of temperature
Sampling gas	N2, Ar, He, Air, H2, O2
Sample gas connection	1/8’’ Swagelok OR 1/8’’ VCR
Sample flow rate	Approximately 3 to 5 l/h
Sample pressure	< 100 mBar
Combustive gas	Synthetic air
Combustive gas connection	1/8’’ Swagelok OR 1/8’’ VCR
Combustive gas pressure	2 Bar stable
Combustive gas fl ow rate	300 ml/min
Recommended quality	5.0
Fuel gas	Hydrogen
Fuel gas connection	1/8’’ Swagelok OR 1/8’’ VCR
Fuel gas pressure	1 Bar stable
Fuel gas fl ow rate	38 ml/min
Recommended quality	6.0
Carrier gas	Argon, Nitrogen, Helium or Hydrogen
Carrier gas connection	1/8’’ Swagelok OR 1/8’’ VCR
Carrier gas pressure	7 Bar
Carrier gas fl ow rate	2 to 6 l/h
Carrier gas fl ow rate	2 to 6 l/h
Recommended quality	6.0
Power supply	220 Vac, 50-60 Hz
Power consumption	500 VA
4-20 mA output	Eight configurable outputs depending on the application.
RJ-45 connection	Computerised system maintenance
Output relays (SPST 2 amperes / 250 Vac)	1 Analyser Failure alarm contact 1 Alarm High contact 1 Alarm High High contact

Measurement Capabilities

	Argon	Helium	Hydrogen	Nitrogen	Oxygen
CH4	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb
CO	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb
CO2	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb
NMHC	<10 ppb	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb

< 10 ppb resolution guaranteed

User-friendly interface

Total Hydrocarbons (C2 => C5)

Adjustable alarm and oven settings

Fast response time

Possibility of auto-calibration programming

CE marked

Chromdyne software