Oxygen Nitrogen Hydrogen Analyzer

The ONH-3500 Oxygen Nitrogen Hydrogen Analyzer is an advanced analytical system engineered to measure oxygen, nitrogen, and hydrogen content in ferrous and non-ferrous metals, rare earth elements, alloys, and a wide range of inorganic materials. It delivers precise elemental analysis to support quality control and material evaluation across industrial applications.

Oxygen Nitrogen Hydrogen Analyzer ONH-3500 Principle:

Introduction:
The system operates on pulse heating inert gas fusion technology. Oxygen (O) is measured using NDIR (Non-Dispersive Infrared Absorption), while nitrogen and hydrogen (N/H) are detected through TCD (Thermal Conductivity Detection).

Working Curves:

 

Main Analysis Window:

Oxygen Nitrogen Hydrogen Analyzer ONH-3500 Features

Parameters Configuration:
Analysis settings for outgassing, flux, and related conditions can be adjusted according to sample properties. Dedicated analytical methods with defined parameters and calibration curves can be created for different sample types and securely stored in the system database.

Diagnostic Function:
Real-time monitoring and display of cooling water temperature, furnace voltage and current, and catalyst heater temperature. Valve operations are also monitored. The system allows adjustment and visualization of IR and TCD baselines along with furnace control functions.

Software:
Provides rapid display of analytical results with automatic data saving after each test. Supports dynamic plotting of release curves and direct transfer of sample weight from balance to computer. Results are calculated using calibration curves, with automatic selection of high or low concentration channels based on sample content.

Data Processing:
Uses ACCESS database for efficient data management and storage. Supports data search, statistical analysis, and printing functions. Data can be organized by date or sample name, along with detailed analysis of release curves.

Oxygen Nitrogen Hydrogen Analyzer ONH-3500

Typical data:

Content: O:88ppm N: 32ppm H: 5.8ppm
Sample No.	O content	N content	H content
1	0.00878	0.00315	0.000591
2	0.00882	0.00319	0.000577
3	0.00865	0.00321	0.000592
4	0.00870	0.00316	0.000580
5	0.00900	0.00312	0.000558

Technical Specifications

Range	Oxygen: Low Oxygen: 0.1ppm ~ 0.5% High Oxygen: 0.5% ~ 20% Nitrogen: Low Nitrogen: 0.1ppm ~ 0.5% High Nitrogen: 0.5% ~ 50% Hydrogen: Low Hydrogen: 0.1ppm ~ 200ppm High Hydrogen: 200ppm ~ 5000ppm Note: * the measurement range can be changed by changing the measurement quantity.
Sensitivity	Oxygen, Nitrogen, and Hydrogen: 0.01ppm
Repeatability	Oxygen and Nitrogen: 1ppm or 1% Hydrogen: 0.2ppm or 2%
Sample Mass	1g (Sample mass can be changed according to the content)
Analysis Time	About 3 min
Carrier Gas	High purity helium for O/N, high purity nitrogen for H
Pneumatic Gas	Nitrogen or compressed air
Structure	Modular Structure Including Analyzer Computer Electronic Balance Printer Water Circulate Chillers Note: * is optional.
Detection System	A Solid-state Infrared detector is used for Oxygen. Thermo-conductivity detector is used for Nitrogen and hydrogen. Infrared Cells: Two IR cells are installed in the analyzer. The length of each cell can be customized according to the content of samples Detector: Solid-state pyroelectric detector made in Germany Motor: Synchronous motor made in Swiss Source: Anti-oxide, stable IR emitter made in US Temperature control: Keep the constant temperature in the whole infrared unit to make sure the temperature of detected gas is stable and the results are accurate Protecting gas: The infrared emitter and the detector are separated from the ambient by nitrogen, which can improve the stability and the accuracy Thermo-conductivity (TCD) detecting unit: Anti-oxide NTC thermistor Signal processing: A small current control technique is developed to make sure the thermistors can be used without carrier gas Reference gas circuit: Low flow control technique is used
Gas Flow Control	High sensitive and accurate electric flow control technique based on the low-pressure difference is applied, and an Anti-Overshoot System is applied
Pulse Heating Electrode Furnace	Power: Max.7.5KVA Temperature: Max.3000℃
Calibration	Fast calibration Normal calibration
Power	220VAC±10%, 50±1Hz, current max. 50A (Max.10KW)