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.
acier, cuivre, alliages, métaux réfractaires, fonte, céramique, carbures, alliages ferriques, fer, métaux, aluminium, silicium, ...
Etape 1 : Enregistrement de l'échantillon dans le logiciel ELEMENTS
L'ID de l'échantillon est enregistré dans le logiciel et le poids est automatiquement transféré (voir étape 2).
Etape 2 : Pesée et introduction de l'échantillon dans le système d'échantillonnage
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.
Etape 3 : Analyse
Le creuset en graphite vide est alors placé sur l'électrode inférieure et l'analyse est lancée via le logiciel ELEMENTS. Le logiciel contrôle toutes les étapes de l’analyse.
Etape 4 : Sortie et exportation des données
120 à 180 secondes après le début de l'analyse, les concentrations mesurées sont disponibles pour l'exportation sous forme de rapport ou via le LIMS.
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.
| Element | Measured as | Detector | ||||
| Oxygen | CO2 | IR | ||||
| Nitrogen | N2 | TCD | ||||
| Hydrogen (Common technique) | H2 | TCD | ||||
| Hydrogen(new technique) | H2O | IR | ||||
The ELEMENTRAC ONH-ps is a multi-element analyser for the parallel determination of oxygen, nitrogen and hydrogen (ONH). While oxygen is detected as CO2 and hydrogen as H2O in infrared measuring cells, nitrogen is determined in elemental form using a thermal conductivity cell. The ELEMENTRAC ONH-ps uses helium or, alternatively, argon as the carrier gas.
The ELEMENTRAC ONH-ps uses our newly developed infrared measuring cells without moving parts. These measuring cells are characterised by a very good signal-to-noise ratio and high stability.
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.
Les produits chimiques et les filtres nécessaires au fonctionnement de l'ELEMENTRAC ON-p 2 sont disposés de manière pratique sur le panneau avant et peuvent être dissimulés derrière une porte amovible lors des opérations de routine. Cette disposition réduit considérablement le temps de maintenance et augmente la convivialité. En outre, des détails innovants améliorent considérablement la reproductibilité des mesures.
Système d'échantillonnage innovant & rinçage pulsé de la chambre
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.
Catalyseur puissant
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.
Gestion du gaz en circuit fermé
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.
Le nettoyage automatique
Lors de la fonte de l’échantillon, dans un creuset en graphite à des températures allant jusqu'à 3000°C, des dépôts sont générés au niveau de l'électrode supérieure et dans la chambre du four, ce qui peut affecter la reproductibilité des mesures d'ONH. Le nouveau dispositif de nettoyage automatique, disponible en option, élimine ces dépôts de manière fiable, permet une analyse précise des gaz, même pour un débit d'échantillons élevé.
De plus, des équipements de pré-nettoyage et le calibrage du gaz porteur sont également à disposition.
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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.
| Eléments mesurés | azote, hydrogène, oxygène |
| Echantillons | inorganique |
| Alignement du four | verticale |
| Porte échantillons | creusets en graphite |
| Domaine d'application | automotive, aviation, metal production, metallurgy, quality control, research |
| Four | four à impulsion avec électrode (max. 8,5 KW*), températures supérieure à 3000 °C |
| Méthode de détection | infrared absorption for oxygen and hydrogen, thermal conductivity for nitrogen |
| Temps d'analyse typique | 120 - 180 s |
| Produits chimiques nécessaires | hydroxyde de sodium, oxyde de cuivre, perchlorate de magnésium |
| Gaz nécessaires | air comprimé, hélium pur 99.995 %, argon pur 99.995% (si nécessaire), tous les gaz avec (2 - 4 bar / 30 - 60 psi) |
| Alimentation électrique | 3~ 400 V, 50/60 Hz, max. 8,500 W |
| Dimensions (L x H x P) | 56 x 78 x 64 cm |
| Poids | ~ 165 kg |
| Equipement nécessaire | PC, écran, balance (résolution 0.0001g) |
| Accessoires optionnels | autocleaner, autoloader, external chiller, purification du gaz porteur |
| - | * limité à 6.8 kw dans les paramètres d'application |
Sous réserve de modifications techniques et d'erreurs
