Eltra oxygen nitrogen hydrogen analyzer ONH-p from Germany

ONH-p uses inert gas fusion technology to heat the sample in a pulse furnace to over 3000 ℃.
ELEMENTRAC ONH-p oxygen nitrogen hydrogen analyzer is used to determine the content of oxygen, nitrogen, and hydrogen elements in inorganic samples. The sample is placed in an electrode pulse furnace, producing temperatures up to 3000 ℃, and melted under inert gas.
ELEMENTRAC ONH-p oxygen nitrogen hydrogen analyzer can ensure fast and accurate determination of samples, with a wide range of applications, such as metals, ceramics, and various other materials.
The ELEMENTRAC ONH-p oxygen nitrogen hydrogen analyzer can be equipped with two infrared detection cells of different lengths. Depending on the oxygen content in the sample, the high or low content detection cell can be automatically selected for measurement; The determination of nitrogen and hydrogen content is carried out using two higher sensitivity thermal conductivity detection cells.

Application Examples

Alloy, steel, copper, cast iron, ceramics, refractory metals ..

advantage

• Using inert gas melting technology to simultaneously measure the content of oxygen, nitrogen, and hydrogen elements
• New: Newly designed closed gas path system, optimized gas path circulation, making oxygen, nitrogen, and hydrogen measurements more accurate
• New: Cheaper argon gas can be used as the carrier gas
• New: Adjustable catalytic furnace temperature for more accurate oxygen measurement
• New: All pneumatic systems are controlled by solenoid valves, and segmented leak detection has been added
• New: Water cooled sample loading port effectively isolates impurity gas from entering
• The instrument configuration and measurement range for oxygen, nitrogen, and hydrogen can be flexibly selected
• The newly designed high-sensitivity infrared detection cell and thermal conductivity cell have extremely low detection limits
• Short analysis time
• The pulse furnace has a power of up to 8.5 kW and a temperature of 3000 ℃
• Granular samples do not require capsule packaging, making them cost-effective to use
• New: Chemical reagents and pipelines hidden behind the door (removable)
• New: Powerful analysis software (supporting data and application report export, adding comment area, and other additional features)
• Single point and multi-point correction (linear regression)
• New: It can be cooled by tap water, cooling circulating water machine or switch
• The newly designed product can be used for various production controls and laboratories

performance metrics

Principle of action

ONH-p operation
The operation of ELEMENTRAC ONH-p oxygen nitrogen hydrogen analyzer is simple and safe. After weighing the sample with a balance, the weight of the sample can be directly transmitted to the computer or manually entered.
Depending on the type of sample, some samples need to be placed in nickel baskets or nickel capsules, while granular or needle shaped steel samples can be directly placed in the sample port. Some samples require the addition of fluxing agents, such as tin or nickel, and the fluxing agents need to be placed in an empty crucible, with a graphite crucible placed on the lower electrode, and then analyzed. The analysis time is usually 2.5 minutes.
All infrared cell output signals and instrument parameters are displayed in real-time and saved in the database along with measurement results. The detection results and set parameters can also be exported. ELEMENTRAC ONH-p oxygen nitrogen hydrogen analyzer requires minimal maintenance, such as the dust filter and reagent tube hidden behind the door, which are very easy to clean and replace. The reagent tube and filter are hidden behind the door, which can be opened or removed during the analysis process to directly observe the condition of the reagent and filter.

Measurement principle of ELEMENTRAC ONH-p oxygen nitrogen hydrogen analyzer
The measurement range of ELEMENTRAC ONH-p oxygen nitrogen hydrogen analyzer is very wide. When analyzing the sample, the sample is weighed and placed in the sample port, and then rinsed with a carrier gas to prevent the atmosphere (including oxygen and nitrogen) from entering the furnace system.
The graphite crucible is degassed in a pulse furnace to minimize inherent contamination (such as residual hydrogen). After the stabilization stage, the sample falls into the crucible and melts. The oxygen in the sample reacts with the carbon in the graphite crucible to produce carbon monoxide. Nitrogen and hydrogen are released in elemental form. The carrier gas (such as helium) and sample gas pass through a dust filter before entering the copper oxide catalytic furnace to oxidize carbon monoxide into carbon dioxide.
Carbon dioxide enters the infrared cell for measuring oxygen content, and the measured gas is introduced into the chemical reagent tube. At this time, carbon dioxide and water are removed by the chemical reagent, and nitrogen element content is measured through the thermal conductivity detection cell. When measuring hydrogen, the carrier gas is replaced with nitrogen gas, and the sample gas passes through Schulz reagent instead of copper oxide catalyst. Cheaper argon gas can also be used as a carrier gas for measuring oxygen and nitrogen.