DID Gas Chromatograph

Principle

One of the biggest advantage of our DID Gas Chromatograph is that a photo-ionised discharge is achieved without any radioactive emissions and without the need to apply excessive voltage being applied to the cell.

Another important characteristic of the DID Gas Chromatograph is that the detector operates using just one gas. This one gas is used as the carrier, the flushing gas and/or the purging gas. This gas can also serve to purge and clean all the valves.

The housing does not require flushing gas: no contamination of the gas circuit is possible before detection as the input connection is located directly on the cell of the DID Gas Chromatograph detector.

The power setting of the high frequency oscillator allows for the adjustment of the detector sensitivity, which can reach 0.1 ppb (parts per billion).

The detection limit and any background noise and directly related to the quality of the carrier gas, so the use of ultra purity (UHP) Helium as the carrier gas is highly recommended.

Some Global References

Company	Type of analyser	Model	Measurement
Linde (China)	Helium	DID	H2, Ne, O2+Ar, N2, CH4
Air Liquide (France)	Oxygen	DID	N2
Linde Worms (Germany)	Argon	DID / Orthosmart	H2, O2, N2, CO, CO2, CH4, NMHC
Linde (Germany)	Nitrogen	DID+FID	H2, O2, Ar, CH4, CO, CO2, NMHC
Air Liquide (France)	Krypton	DID	H2, O2+Ar, N2, Xe

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	1 % of the reading scale
Drift	1 % over 24 hours
Temperature drift	1 % per degree
Operating temperature	± 20°C without wide variations of temperature
Sampling gas	He, N2 , H2, O2, Ar, CO2 , Kr, Xe
Sample gas connection	1/8’’ Swagelok OR 1/8’’ VCR.
Sample flow rate	Approximately 3 to 5 l/h
Sample pressure	< 100 mBar
Carrier gas	Helium
Carrier gas connection	1/8’’ Swagelok OR 1/8’’ VCR.
Carrier gas pressure	7 bar
Carrier gas flow rate	4 l/h
Recommended quality	minimum 6.0
Power supply	220 Vac, 50-60 Hz
Power consumption	420 VA
4-20 mA output	Eight confi gurable 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	Hydrogen	Nitrogen	Oxygen	Helium
CH4	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb
CO	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb
H2	< 10 ppb	/	< 10 ppb	< 10 ppb	< 10 ppb
N2	< 10 ppb	< 10 ppb	/	< 10 ppb	< 10 ppb
O2 + Ar	/	< 10 ppb	< 10 ppb	/	< 10 ppb
O2	< 10 ppb	< 10 ppb	< 10 ppb	/	< 10 ppb
Ar	/	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb
CO2	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb	< 10 ppb
Ne					< 100 ppb
Kr					< 10 ppb
Xe					< 10 ppb

< 10 ppb resolution guaranteed

User-friendly interface

Adjustable alarm and oven settings

Fast response time

Possibility of auto-calibration programming

CE marked

Chromdyne software

DID Gas Chromatograph - Helium

General

Principle

Some Global References

Type of configurations

DID Gas Chromatograph - 500

DID Gas Chromatograph - 600

Technical specifications

Measurement capabilities

Dimensions & chromatogram

Features

Applications

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