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.
Stahl, Kupfer, Legierungen, Refraktärmetalle, Gusseisen, Keramik, Karbide, Ferrolegierungen, Eisen, Metalle, Aluminium, Silizium, ...
Schritt 1: Anmelden der Probe in der ELEMENTS Software
Die Probe wird mit ihrer ID in der Software angemeldet. Das Gewicht wird von der Waage (siehe Schritt 2) automatisch übernommen.
Schritt 2: Einwaage und Applikation in die Probenschleuse
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.
Schritt 3: Analyse
Ein leerer Graphittiegel wird auf die untere Elektrode gestellt und die Analyse in der ELEMENTS Software gestartet. Diese kontrolliert alle nachfolgenden Analysenschritte.
Schritt 4: Datenausgabe und Export
120 bis 180 Sekunden nach dem Analysenstart liegen die Messergebnisse vor und können via Report oder LIMS exportiert werden.
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.
Die für den Betrieb des ELEMENTRAC ON-p 2 notwendigen Chemikalien und Filter sind benutzerfreundlich auf der Frontseite angeordnet und lassen sich im Routinebetrieb hinter einer abnehmbaren Tür verbergen. Diese Anordnung reduziert den Zeitaufwand für Wartungen deutlich und erhöht die Anwenderfreundlichkeit. Zudem verbessern innovative Details signifikant die Reproduzierbarkeit von Messungen.
Innovative Probenschleuse & gepulste Probenkammerspülung
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.
Leistungsstarker Katalysator
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.
Geschlossener Gaskreislauf
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
Durch das Aufschmelzen der Probe in einem Graphittiegel bei Temperaturen von bis zu 3000 °C entstehen an der oberen Elektrode und im Ofenraum Ablagerungen, welche die Reproduzierbarkeit von ONH Messungen im Tagesverlauf negativ beeinflussen können. Der neue optionale Autocleaner des ELEMENTRAC ONH-p 2 entfernt diese Ablagerungen zuverlässig und ermöglicht so eine präzise Gasanalyse auch bei hohem Probenaufkommen. Darüber hinaus stehen eine effiziente Gaskalibrierung, sowie ein Gasreinigungsofen zur umfassenden Trägergasvorreinigung zur Verfügung.
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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 | Sauerstoff, Stickstoff, Wasserstoff |
| Probenart | anorganisch |
| Ofenausrichtung | vertikal |
| Probenträger | Graphittiegel |
| Anwendungsbereich | automotive, aviation, metal production, metallurgy, quality control, research |
| Ofenart | Impulsofen (max. 8,5 KW*), für Temperaturen über 3.000 °C |
| Messprinzip | infrared absorption for oxygen and hydrogen, thermal conductivity for nitrogen |
| Typische Analysenzeit | 120 - 180 s |
| Erforderliche Chemikalien | Kupferoxid, Magnesiumperchlorat, Natriumhydroxid |
| Erforderliche Gase | Druckluft, Helium 99.995 %, Argon 99.995% (bei Bedarf), alle Gase mit 2 - 4 bar / 30 - 60 psi |
| Energiebedarf | 3~ 400 V, 50/60 Hz, max. 8.500 W |
| Abmessungen (B x H x T) | 56 x 78 x 64 cm |
| Gewicht | ~ 165 kg |
| Erforderliches Zubehör | Monitor, PC, Waage (Auflösung 0,0001g) |
| Optionales Zubehör | Trägergas-Reinigungsofen, autocleaner, autoloader, external chiller |
| - | * in Applikationen auf 6,8 kW begrenzt |
Technische Änderungen und Irrtümer vorbehalten
