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- Installation & training on-site setup, gas connection and operator onboarding
- Method + calibration an O/N SOP set up on your metals and powders
O-N-H Analyzers, Analysis equipment, Elemental Analyzers
ELTRA ELEMENTRAC ON-p 2 Oxygen/Nitrogen Analyzer – Inert Gas Fusion | Steel, Metals & Titanium
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
- ✔ 8.5 kW impulse furnace > 3,000 °C · closed gas system · low detection limits
- ✔ Up to 2000 mg · argon carrier possible · Autocleaner option
- ✔ 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
Oxygen and nitrogen 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 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 combined ON, with inexpensive argon possible as carrier gas.
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 ON-p 2 determines oxygen and nitrogen 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 above 3,000 °C; oxygen is measured as CO₂ in up to two infrared cells, while nitrogen is detected in its elemental form in a high-sensitivity thermal conductivity cell. A closed gas system feeds 100 % of the released sample gas to the detectors for low detection limits — the O and N numbers that govern quality in steel, titanium and metal AM powders.
Why metallurgy and AM labs choose the ON-p 2
Oxygen and nitrogen in metals — the fusion numbers that decide quality.
O + N 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 and nitrogen by thermal conductivity. Single-element or combined ON.
Closed gas system, low limits
A closed gas system under overpressure feeds 100 % of the released sample gas to the detectors for low detection limits and good reproducibility — with inexpensive argon possible as carrier gas.
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 crucible — robust against dust, no capsule closing needed.
Copper-oxide 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.
How Additive Plus supports it
A configured, installed analyzer with an O/N method dialed in on your metals.
Step 01
Configure to your samples
We spec the O, N or ON mode, carrier gas 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 oxygen/nitrogen baseline.
What the ON-p 2 measures
Full technical specifications are in the Specifications tab. Key measurement capability:
| Parameter | ELEMENTRAC ON-p 2 |
|---|---|
| Measured elements | Oxygen, nitrogen (single or combined ON) |
| Principle | Inert gas fusion — electrode impulse furnace > 3,000 °C (8.5 kW) |
| Detection | IR for oxygen (as CO₂) · thermal conductivity for nitrogen |
| Sample weight | Up to 2,000 mg · pins, granules or powder in capsules |
| Analysis time | ~120–180 seconds |
| Carrier gas | Helium (optionally argon) |
Typical sample materials
Oxygen and nitrogen 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 ON-p 2 is the right analyzer?
Compare with related ELEMENTRAC fusion analyzers in our catalog.
Adds hydrogenELEMENTRAC ONH-p 2View analyzer →
Oxygen + hydrogenELEMENTRAC OH-p 2View analyzer →
Diffusible hydrogenELTRA H-500View analyzer →
Oxygen + hydrogenELEMENTRAC OH-p 2View analyzer →
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Tell us your alloy or powder and whether you need oxygen only, nitrogen only, or both — our applications engineer will confirm whether the ON-p 2 or the full ONH-p 2 fits, and the carrier-gas mode. Sub-4h reply, NDA standard.
Why source the ON-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 — O/N/ON mode, carrier gas and Autocleaner specified before shipping.
- Method development on your metals — gas calibration, crucible outgassing and a repeatable O/N 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 ON-p 2 |
| Measured elements | 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 |
| Typical analysis time | 120 - 180 s |
| Chemicals required | copper oxide, magnesium perchlorate, sodium hydroxide |
| Gas required | compressed air, helium 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) | 570 x 770 x 630 mm / 22.44 x 30.31 x 24.8 in |
| Weight | ~ 161 kg |
| Required equipment | PC, monitor, balance (resolution 0.0001g) |
| Optional accessories | carrier gas purification, external chiller, gas calibration unit |
Product videos
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· Configured to order — request lead timeFrom metallurgy and AM labs running the ELTRA ELEMENTRAC ON-p 2
Unedited feedback from materials-QC teams.
★★★★★
Oxygen and nitrogen on steel with low detection limits and short cycles. The closed gas system keeps our results reproducible.
MF
Markus F. QC Engineer · Steel / metallurgy
★★★★★
We track oxygen and nitrogen pickup on titanium AM powder lot to lot. Up to 2000 mg lets us run representative powder.
LS
Lucia S. Process Engineer · Additive manufacturing
★★★★★
Argon as carrier cut our running cost, and the sample port takes 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 ON-p 2 measure?
The ELEMENTRAC ON-p 2 determines oxygen and nitrogen in metals and inorganic materials such as steel, non-ferrous metals, ceramics, slags and ores. It is available as a single-element analyzer for oxygen or nitrogen only, or in a combined ON configuration. Oxygen is measured as CO₂ in up to two infrared cells; nitrogen is measured in its 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 of the furnace. The graphite crucible is outgassed in the impulse furnace, 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 is released in elemental form and measured by thermal conductivity. Analysis takes about 120–180 seconds.
Which carrier gas does it use?
The ON-p 2 uses helium as carrier gas to take advantage of the sensitive thermal conductivity cell for nitrogen, and the less expensive argon can be used as an option to reduce running costs. A closed gas system under overpressure ensures that 100 % of the released sample gas reaches the detectors, which keeps detection limits low. Additive Plus configures the carrier gas to your elements and material.
Is the ON-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 pickup during atomization, handling and reuse affects part properties. The ON-p 2 quantifies O and N 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. An optional Autocleaner removes furnace deposits generated during melting to keep results reproducible in high-throughput operation, and a gas calibration and cleaning furnace is available.
What does the ON-p 2 need to run?
It needs helium (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 570 × 770 × 630 mm and weighs ~161 kg.
What is the lead time, and can Additive Plus set it up?
The ELEMENTRAC ON-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 oxygen/nitrogen 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 ON-p 2 Oxygen/Nitrogen Analyzer – Inert Gas Fusion | Steel, Metals & Titanium direct, or talk to materials engineer