OrthoPure DID Gas Chromatograph

OrthoPure DID - Gas Chromatograph for PPB analysis

Analysis of H2, O2+Ar, Ar, N2, CH4, CO, CO2, C2H6, C3H8 in PPB level.

General

The OrthoPure DID Gas Chromatograph detector has been designed to make use of the variations in electrical conductibility found in highly ionised gas. The ionisation is created by a single high frequency discharge within the detector (HF Plasma), causing a high energy photon emission (24.5 eV). This emission is capable of ionising all the gases within the cell with the exception of the Helium.

Principle

One of the biggest advantage of our OrthoPure Gas Chromatograph DID detector 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 OrthoPure DID 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 OrthoPure DID 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 are directly related to the quality of the carrier gas, so the use of ultra purity (UHP) Helium as the carrier gas is highly recommended.

Applications

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Dimensions

Orthopure DID Gas Chromatograph Dimensions - Orthodyne

(Dimensions can differ regarding the application)

 

Technical specifications

Accuracy<1 % of the reading scale or depends on LDL
Drift<1 % of the reading scale over 24 hours
Temperature drift<1 % of the reading scale per degree
Operating temperature~20°C without wide variations of temperature
Sampling gasHe, N2, H2, O2, Ar
Sample gas connection1/8’’ Swagelok SS or VCR
Sample flow rateApproximately 3 to 5 l/h
Sample pressureLower than 100 mBarg
Carrier gasHelium
Carrier gas connection1/8’’ Swagelok SS or VCR
Carrier gas pressureDepending on the application
Carrier gas flow rate4 l/h
Recommended qualityMinimum 6.0 or purified Helium
Power supply220 Vac, 50-60 Hz
Power consumption420 VA
4-20 mA outputEight configurable outputs depending on the application.
Digital outputOptional RS232, Modbus, Profibus
Output relays
(SPST 2 amperes / 250 Vac)
1 Analyser Failure Alarm contact
1 Alarm High contact
1 Alarm High High contact

Measurement capabilities

ArgonHeliumNitrogenHydrogenOxygen
H2< 0.5 ppb< 0.5 ppb< 0.5 ppb/< 0.5 ppb
Ar/< 0.5 ppb< 0.5 ppb< 0.5 ppb< 0.5 ppb
O2 + Ar/< 0.5 ppb< 0.5 ppb< 0.5 ppb/
N2< 0.5 ppb< 0.5 ppb/< 0.5 ppb< 0.5 ppb
CH4< 0.5 ppb< 0.5 ppb< 0.5 ppb< 0.5 ppb< 0.5 ppb
CO< 0.5 ppb< 0.5 ppb< 0.5 ppb< 0.5 ppb< 0.5 ppb
CO2< 0.5 ppb< 0.5 ppb< 0.5 ppb< 0.5 ppb< 0.5 ppb

Features

< 1 ppb resolution guaranteed (EPA 40)
User-friendly interface
Adjustable alarm and oven settings
Fast response time
Possibility of auto-calibration programming
CE marked
Chromdyne software

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Contact

    Brochure