The new ELEMENTRAC ONH-ps is a powerful and robust elemental analyzer for the simultaneous determination of oxygen, nitrogen and hydrogen concentrations in inorganic samples such as steel, iron, copper or ceramics. The highly sensitive NDIR cells without moving parts and the thermal conductivity detector for nitrogen measurement reliably detect element concentrations from the low ppm range to the high percentage range.
Thanks to the novel sample lock with pulsed chamber purging and vertical fall channel, user-friendly and convenient analysis of rod-shaped, granular or powdery samples with a weighed portion of up to 2 grams is easily possible. The ELEMENTRAC ONH-ps elemental analyzer meets or exceeds the requirements of all common international standards, such as ASTM E 1019 or DIN EN 3976.
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Pasul 1: Logarea probei în software-ul ELEMENTS
ID-ul eșantionului este conectat la software și greutatea este transferată automat (vezi pasul 2).
Pasul 2: Cântărirea și introducerea probei în portul probei
The ELEMENTRAC ONH-ps analyzes volumes from a few mg up to 2 grams safely and precisely. Rod-shaped or granular samples can be applied directly. For the elemental analysis of powders, a capsule is recommended which does not have to be sealed.
Pasul 3: Analiza
Creuzetul gol din grafit este apoi plasat pe electrodul inferior și analiza este pornită prin intermediul software-ului ELEMENTS. Software-ul controlează toți pașii de analiză ulteriori.
Pasul 4: date ieșire și exportul datelor
Common O/N/H analysis for inert gas fusion analyzers mean that a thermal conductivity cell is used for both hydrogen as well as for nitrogen analysis. This means that two independent measurements have to be performed when determination of nitrogen and hydrogen is required. The ELEMENTRAC ONH-ps utilizes a new designed water IR cell without moving parts which allows a reliable measurement of hydrogen as water even in the lower ppm concentration range. This allows the simultaneous measurement of oxygen, nitrogen and hydrogen in one sample.
| Elemente | Măsurat ca | Detector | ||||
| Oxigen | CO2 | IR | ||||
| azot | N2 | TCD | ||||
| Hidrogen (tehnică uzuală) | H2 | TCD | ||||
| Hidrogen(new technique) | H2O | IR | ||||
ELEMENTRAC ONH-ps este un analizor multi-element pentru determinarea simultană a oxigenului, azotului și hidrogenului (ONH). Oxigenul este detectat sub formă de CO₂, iar hidrogenul sub formă de H₂O în celule de măsurare în infraroșu, în timp ce azotul este determinat în formă elementală cu ajutorul unei celule de conductivitate termică. ELEMENTRAC ONH-ps utilizează heliu sau, alternativ, argon ca gaz purtător. ELEMENTRAC ONH-ps utilizează celule de măsurare în infraroșu nou dezvoltate, fără componente mecanice mobile. Aceste celule se caracterizează printr-un raport semnal/zgomot foarte bun și o stabilitate ridicată.
The ELEMENTRAC ONH-ps elemental analyzer is available as a single-element analyzer for hydrogen only, or in a multi-element configuration for measuring ONH. Whereas oxygen and hydrogen are determined as CO2 and H2O in up to three infrared cells, nitrogen is detected in its elemental form in a thermal conductivity cell.
The chemicals and filters required for operation of the elemental analyzer are arranged conveniently on the front panel and can be concealed behind a removable door during routine operation. This arrangement significantly reduces the time required for maintenance and increases user-friendliness. In addition, innovative details considerably improve the reproducibility of measurements.
The new sample port of the ONH-ps elemental analyzer ensures comfortable operation and reproducible measured values. Differently shaped materials like solid pieces, granules or powder in capsules can be applied up to a weight of 2000 mg, and are quickly freed from the surrounding atmosphere with the help of pulsed carrier gas flushing in the sample port. Then they drop vertically into the preheated graphite crucible for analysis.
Catalizator puternic
During fusion of the sample CO is formed, whereas hydrogen and nitrogen are released in elemental form. The powerful catalyst furnace oxidizes CO to CO2 and hydrogen to water, which are subsequently measured in the IR cells. The high temperature catalyst furnace with copper oxide filling guarantees the complete oxidation of CO to CO2 and of course of H2 to gaseous H2O.
control al debitului de gaz inchis
The ELEMENTRAC ONH-ps elemental analyzer series uses a closed gas system in overpressure. This ensures that always 100% of the released sample gas is fed to the detectors which guarantees low detection limits and good reproducibility.
Autocleaner
By melting the sample in a graphite crucible at temperatures of up to 3000 °C deposits are generated at the upper electrode and in the furnace chamber which may affect the reproducibility of ONH measurements in a negative way.
The new optional Autocleaner reliably removes these deposits, enabling precise elemental analysis even for high throughputs. Additionally, an efficient gas calibration and cleaning furnace for thorough carrier gas pre-cleaning are available for the elemental analyzer.
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The ELEMENTRAC ONH-ps uses a measuring principle with a wide operating range. To analyse the sample, it is weighed and placed in the sample lock. Flushing with carrier gas ensures that no atmosphere (e.g. nitrogen and oxygen) enters the analysis chamber.
The graphite crucible is then annealed in the pulse furnace to reduce any contamination, such as residual hydrogen. After a stabilisation phase, the sample falls into the graphite crucible and is melted. Elemental nitrogen, hydrogen and carbon monoxide are released from the sample melt into the carrier gas stream. The carbon monoxide comes from the reaction of the carbon in the graphite crucible with the oxygen in the sample. The carrier gas (helium) and the sample gas pass through a dust filter before entering a copper oxide catalyst, where CO is converted to CO2 and elemental hydrogen to H2O.
The resulting CO2 and H2O are then detected in the infrared cells. CO2 and H2O are chemically removed and the nitrogen content is measured in the heat conduction cell.
Optionally, inexpensive argon can be used instead of helium as the carrier gas for determining oxygen and nitrogen.
| Elemente măsurate | azot, hidrogen, oxigen |
| Probe | anorganice |
| Aliniere cuptor | vertical |
| Purtător de probă | creuzete de grafit |
| Domeniul de aplicare | automotive, aviation, metal production, metallurgy, quality control, research |
| Cuptor | cuptor cu impulsuri (max. 8,5 KW*), temperatură mai mare de 3000 °C |
| Metoda de detecție | infrared absorption for oxygen and hydrogen, thermal conductivity for nitrogen |
| Durată tipică de analiză | 120 - 180 s |
| Reactivi necesari | hidroxid de sodiu, oxid de cupru, perclorat de magneziu |
| Gaze necesare | compressed air, helium 99.995 % pure, argon 99.995% pure (if required), all gases with (2 - 4 bar / 30 - 60 psi) |
| Alimentare | 3~ 400 V, 50/60 Hz, max. 8,500 W |
| Dimensiuni (W x H x D) | 56 x 78 x 64 cm |
| Greutate | ~ 165 kg |
| Echipament necesar | PC, monitor, balanță (rezoluție 0,0001) |
| Accesorii opționale | purificare gaz purtător, autocleaner, autoloader, external chiller |
| - | limited to 6,8 kw in application settings |
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