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- Installation & training on-site setup, gas connection and operator onboarding
- Method + calibration an O/N/H SOP set up on your metals and powders
O-N-H Analyzers, Analysis equipment, Elemental Analyzers
ELTRA ELEMENTRAC ONH-p 2 Oxygen/Nitrogen/Hydrogen Analyzer – Inert Gas Fusion | Steel, Metals & Titanium
Inert-gas-fusion analyzer for oxygen, nitrogen and hydrogen in metals — the sample melts in a graphite crucible in an 8.5 kW impulse furnace above 3,000 °C, with IR detection of oxygen and thermal conductivity for nitrogen and hydrogen.
- ✔ O / N / H by fusion · single or ON / OH / NH / ONH · inorganic samples
- ✔ 8.5 kW impulse furnace > 3,000 °C · closed gas system · low detection limits
- ✔ Up to 2000 mg · 32-position autoloader · Autocleaner · argon possible
- ✔ Lead time: configured to order — request current timeline
Price held 7 days after order.
Install + training included
Tailored service plan
Built for metallurgy and AM QC teams
What your QC lab actually checks
O/N/H in metals by fusion
An 8.5 kW electrode impulse furnace melts the sample in a graphite crucible above 3,000 °C; oxygen is measured as CO₂ by infrared and nitrogen and hydrogen by a high-sensitivity thermal conductivity cell. A closed gas system feeds 100 % of the sample gas to the detectors for low detection limits — the oxygen and nitrogen numbers that decide quality in steel, titanium and metal AM powders. Single-element or ON, OH, NH and ONH modes cover the full range.
An applications engineer on the line
Mode and carrier-gas selection, gas calibration, crucible outgassing and blank control from engineers who run metal additive manufacturing in-house (AO Metal). Sub-4h reply, NDA standard.
About this product
The ELTRA ELEMENTRAC ONH-p 2 determines oxygen, nitrogen and hydrogen in metals and inorganic materials by inert gas fusion. The sample melts in a graphite crucible in a powerful 8.5 kW electrode impulse furnace at temperatures in excess of 3,000 °C; oxygen is measured as CO₂ in up to two infrared cells, while nitrogen and hydrogen are detected in their elemental form in a high-sensitivity thermal conductivity cell. A closed gas system feeds 100 % of the sample gas to the detectors for low detection limits — essential for O/N control in steel, titanium and metal AM powders.
Why metallurgy and AM labs choose the ONH-p 2
Oxygen, nitrogen and hydrogen in metals — the fusion numbers that govern quality.
O/N/H by inert gas fusion
An 8.5 kW electrode impulse furnace melts the sample in a graphite crucible above 3,000 °C — oxygen is measured as CO₂ by IR, nitrogen and hydrogen by thermal conductivity. Single-element or ON, OH, NH and ONH modes.
Closed gas system, low limits
A closed gas system under overpressure feeds 100 % of the released sample gas to the detectors, guaranteeing low detection limits and good reproducibility — with inexpensive argon possible as carrier gas.
Innovative sample port, up to 2000 mg
Solid pieces, granules or powder in capsules load up to 2,000 mg and are freed of atmosphere by pulsed carrier-gas flushing before dropping into the preheated crucible — robust against dust, no capsule closing required.
Powerful catalyst + Autocleaner
A copper-oxide catalyst fully oxidizes CO to CO₂ for reliable oxygen even on oxides; the optional Autocleaner removes furnace deposits for precise, high-throughput analysis, with a 32-position autoloader available.
How Additive Plus supports it
A configured, installed analyzer with an O/N/H method dialed in on your metals.
Step 01
Configure to your samples
We spec the ON/OH/ONH mode, carrier gas, autoloader and Autocleaner to your alloy or powder and detection range before it ships.
Step 02
Install & train
Factory-trained engineers install the analyzer, connect the three-phase power, gases and PC/balance, and train your team on the ELEMENTS software.
Step 03
Method & QC support
We help build the SOP — gas calibration, crucible outgassing, blank control and a repeatable O/N/H baseline for your material.
What the ONH-p 2 measures
Full technical specifications are in the Specifications tab. Key measurement capability:
| Parameter | ELEMENTRAC ONH-p 2 |
|---|---|
| Measured elements | Oxygen, nitrogen, hydrogen (single or ON / OH / NH / ONH) |
| Principle | Inert gas fusion — electrode impulse furnace > 3,000 °C (8.5 kW) |
| Detection | IR for oxygen (as CO₂) · thermal conductivity for nitrogen and hydrogen |
| Sample weight | Up to 2,000 mg · pins, granules or powder in capsules |
| Analysis time | ~120–180 seconds |
| Carrier gas | Helium (or argon) for ON · nitrogen for OH |
Typical sample materials
Oxygen, nitrogen and hydrogen in metals and inorganic materials.
Steel & cast iron
Oxygen and nitrogen QC
Titanium & AM powders
O/N pickup control
Non-ferrous metals
Copper, aluminum, alloys
Ceramics
Oxygen content
Slags & ores
Metallurgy
Refractory metals
Incoming inspection
Not sure the ONH-p 2 is the right analyzer?
Compare with single-purpose O/N/H analyzers in our catalog.
Oxygen + nitrogenELEMENTRAC ON-p 2View analyzer →
Oxygen + hydrogenELEMENTRAC OH-p 2View analyzer →
Diffusible hydrogenELTRA H-500View analyzer →
Oxygen + hydrogenELEMENTRAC OH-p 2View analyzer →
Diffusible hydrogenELTRA H-500View analyzer →
Tell us your alloy or powder and whether you need oxygen, nitrogen, hydrogen or all three — our applications engineer will confirm whether the full ONH-p 2 or a single-purpose ON/OH analyzer fits, and the carrier-gas mode. Sub-4h reply, NDA standard.
Why source the ONH-p 2 through Additive Plus
- Authorized channel for ELTRA / Verder Scientific lab equipment — sales, installation, training and service in one place.
- Configured to your samples — ON/OH/ONH mode, carrier gas, autoloader and Autocleaner specified before shipping.
- Method development on your metals — gas calibration, crucible outgassing and a repeatable O/N/H SOP; relevant to metal AM powder QC.
- <24h response from engineers who run metal additive manufacturing in-house (AO Metal). NDA standard.
| Brand | ELTRA |
| Model | ELEMENTRAC ONH-p 2 |
| Measured elements | hydrogen, nitrogen, oxygen |
| Samples | inorganic |
| Furnace alignment | vertical |
| Sample carrier | graphite crucibles |
| Field of application | ceramics, engineering / electronics, steel / metallurgy |
| Furnace | electrode impulse furnace (max. 8,5 KW*), temperatures in excess of 3,000 °C |
| Detection method | solid state infrared absorption for oxygen thermal conductivity for nitrogen and hydrogen |
| Typical analysis time | 120 - 180 s |
| Chemicals required | Schuetze reagents, copper oxide, magnesium perchlorate, sodium hydroxide |
| Gas required | compressed air, helium 99.995 % pure, nitrogen 99.995% pure, argon 99.995% pure (if required), all gases with (2 - 4 bar / 30 - 60 psi) |
| Power requirements | 3~ 400 V, 50/60 Hz, max. 8,500 W |
| Dimensions (W x H x D) | 560 x 780 x 640 mm / 22.05 x 30.71 x 25.2 in |
| Weight | ~ 165 kg |
| Required equipment | PC, monitor, balance (resolution 0.0001g) |
| Optional accessories | carrier gas purification, external chiller, gas calibration unit |
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Inert-gas-fusion analyzer for oxygen and nitrogen in metals — the sample melts in a graphite crucible in an 8.5 kW impulse furnace above 3,000 °C, with IR detection of oxygen and thermal conductivity for nitrogen.
- ✔ O / N by fusion · single or combined ON · inorganic samples
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· Lead time: configured to order — request current timelineFrom metallurgy and AM labs running the ELTRA ELEMENTRAC ONH-p 2
Unedited feedback from materials-QC teams.
★★★★★
Oxygen and nitrogen on steel with low detection limits. The closed gas system and Autocleaner keep our high-throughput runs reproducible.
MF
Markus F. QC Engineer · Steel / metallurgy
★★★★★
We track oxygen pickup on titanium AM powder lot to lot. Up to 2000 mg means we can run representative powder samples.
LS
Lucia S. Process Engineer · Additive manufacturing
★★★★★
Argon as carrier gas cut our running cost, and the sample port handles granules without closing capsules.
AR
Ahmed R. Materials Engineer · Non-ferrous metals
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What does the ELTRA ELEMENTRAC ONH-p 2 measure?
The ELEMENTRAC ONH-p 2 determines oxygen, nitrogen and hydrogen in metals and inorganic materials such as steel, non-ferrous metals, ceramics, slags and ores. It is available as a single-element analyzer (O, N or H) or in a multi-element configuration for ON, OH, NH or ONH. Oxygen is measured as CO₂ in up to two infrared cells; nitrogen and hydrogen are measured in their elemental form in a thermal conductivity cell.
How does the inert gas fusion measurement work?
The weighed sample is placed on the sample port and flushed with carrier gas to keep atmospheric oxygen and nitrogen out. A graphite crucible is first outgassed in the impulse furnace to reduce contamination, then the sample is dropped in and melted above 3,000 °C. Carbon in the crucible reacts with the sample's oxygen to form CO, which a copper-oxide catalyst converts to CO₂ for IR measurement; nitrogen and hydrogen are released in elemental form and measured by thermal conductivity. Analysis takes about 120–180 seconds.
Which carrier gases does it use?
The ONH-p 2 uses an ON mode with helium carrier gas (optionally the less expensive argon) and an OH mode with nitrogen carrier gas, to make the most of the sensitive thermal conductivity cell. For hydrogen, the nitrogen carrier and sample gas pass through a Schuetze reagent instead of the copper-oxide catalyst. Additive Plus configures the carrier-gas mode to your elements and material.
Is the ONH-p 2 suitable for titanium and metal AM powder QC?
Yes. Oxygen and nitrogen content are critical quality parameters for titanium and other metal AM powders, because oxygen pickup during atomization, handling and reuse affects part properties. The ONH-p 2 quantifies O, N and H by fusion with low detection limits, and its sample port takes up to 2,000 mg of powder in capsules for representative sampling. Additive Plus runs metal additive manufacturing in-house (AO Metal) and can help set up the method.
What sample sizes and automation does it offer?
The innovative sample port accepts solid pieces, granules or powder in capsules up to 2,000 mg, freed of surrounding atmosphere by pulsed carrier-gas flushing before dropping vertically into the crucible — no capsule closing required and robust against dust. A 32-position autoloader with a matching crucible magazine is available for high-throughput O/N/H analysis, and an optional Autocleaner removes furnace deposits to keep results reproducible.
What does the ONH-p 2 need to run?
It needs helium (99.995 %), nitrogen (99.995 %), optionally argon (99.995 %) and compressed air, an external PC and monitor, and a balance with 0.0001 g resolution. It runs on three-phase 400 V, 50/60 Hz (max 8,500 W) for the 8.5 kW impulse furnace. Options include carrier-gas purification, an external chiller and a gas calibration unit. The analyzer measures about 560 × 780 × 640 mm and weighs ~165 kg.
What is the lead time, and can Additive Plus set it up?
The ELEMENTRAC ONH-p 2 is configured to order; request a quote for the current lead time. Additive Plus is an authorized ELTRA / Verder Scientific channel and handles installation, three-phase power and gas connection, calibration and operator training, then helps build your O/N/H SOP. You can also send a sample for a paid measurement first. Sub-4h reply, NDA standard.
Place your order, or talk to an engineer first
Order ELTRA ELEMENTRAC ONH-p 2 Oxygen/Nitrogen/Hydrogen Analyzer – Inert Gas Fusion | Steel, Metals & Titanium direct, or talk to materials engineer