Overview
Thermal conductivity gas analyzer is an effective method to measure one of two components in a gas mixture (the thermal conductivities differ a lot). Mainly used to measure the content of hydrogen (H2), carbon dioxide (CO2), argon (Ar), etc.
Principle
The sensor chip consists of a silicon frame with a silicon-nitride membrane. In the center is a heater and a thermopile. The center of the membrane is heated using a heater resistor. The resulting temperature increase is measured by the thermopile. This temperature rise depends on the effective thermal resistance between the membrane center and the ambient gases. The chip measures the thermal conductance between the ambient and the membrane center, which is influenced by the thermal conductivity of the measured gas.
Application
• Measurement of hydrogen (H2) content in synthesis gas of ammonia plant
• Purity measurement of hydrogen (H2) in hydrogenation unit
• Measurement of oxygen (O2) in pure hydrogen (H2) and hydrogen (H2) in pure oxygen (O2) in the process of producing hydrogen by electrolysis of water and oxygen
• Hydrogen (H2) content measurement in hydrocarbon gas
• Monitoring of hydrogen (H2) and carbon dioxide (CO2) content in hydrogen-cooled generator sets
• Measurement of hydrogen (H2) in chlorine (Cl2) in the chlorine production process
• Measurement of chlorine (Cl2) in the chlorine production process
• Measurement of carbon dioxide (CO2) content in flue gas of furnace combustion
• Argon (Ar) content measurement in air separation plant
• Monitoring in the production of pure gases, such as helium (He) in nitrogen (N2) and argon (Ar) in oxygen (O2)
• Sulfur dioxide (SO2) content measurement in the production process of sulfuric acid and phosphate fertilizer
Features
• Integrated Infrared/Ultraviolet Measurement Optional
For multicomponent gases (>2 species), this optional module isolates specific molecular spectra to eliminate cross-interference for independent measurement.
• Condensation and dust protection Optional
The sintered stainless steel with µm-sized holes is used to protect the sensor.
The PTFE hydrophobic membrane is used to protect the sensor, allowing gas molecules to pass through while preventing liquid water from penetrating.
• Multiple gas measurement modes Optional
The analyzer has 3 built-in binary mixed gas measurement modes and calibration curve.
• High corrosion resistance Optional
Sensor is made from Al2O3, glass and SiO2 coated Pt filaments, and Gas connections in PTFE, PFA
• High temperature Optional
Sensor is be used at higher temperatures up to 180°C
• Optional mass flow measurement and controller
• Convenient
The navigation menu contains 6 languages, which can be operated easily.
• Process safety
7" large size color LCD touch screen, convenient and safe touch operation and debugging
Large size screen with red flashing alarm, clearly visible from long distances and in dark areas
Alarm immediately, safe the process
• Data alarm record
Real-time data curve display
Record function for up to 6000 alarms
• Expert calibration function
Multi-point calibration function up to 9 point
• Powerful self-diagnosis function
Built-in heartbeat monitoring function and watchdog
Monitor the status of analyzer and sensors, and promptly remind customers to take necessary maintenance
High-standard hardware and software security and password protection
• Powerful control function
High(low) limit control function
Optional: Timer control(automatic cleaning) function
Optional: analog PID control function
Optional: PWM control function
• Flexible fieldbus communication functions for IOT4.0
Optional fieldbus MODBUS, HART, Foundation Fieldbus FF, PROFIBUS PA, PROFIBUS DP, etc.
• ATEX / IECEx Exd II CT4 Optional
Measurement range
Measuring gas | Background Gas | Range | Min. range 1 | Min. range 2 | Gas mixtures |
Hydrogen(H2) | Nitrogen (N2) or air | 0% – 100% | 0% – 0.5% | 98% – 100% | Yes |
Hydrogen(H2) | Argon (Ar) | 0% – 100% | 0% – 0.4% | 99% – 100% | Yes |
Hydrogen(H2) | Helium (He) | 20% – 100% | 20% – 40% | 85% – 100% | |
Hydrogen(H2) | Methane(CH4) | 0% – 100% | 0% – 0.5% | 98% – 100% | |
Hydrogen(H2) | Carbon dioxide (CO2) | 0% – 100% | 0% – 0.5% | 98% – 100% | |
Hydrogen(H2) | Oxygen(O2) | 0% – 100% | 0% – 0.8% | 97% – 100% | |
Carbon dioxide (CO2) | Nitrogen (N2) or air | 0% – 100% | 0% – 3% | 96% – 100% | Yes |
Carbon dioxide (CO2) | Argon (Ar) | 0% – 60% | 0% – 10% | — | Yes |
Argon (Ar) | Oxygen(O2) | 0% – 100% | 0% – 3% | 96% – 100% | Yes |
Argon (Ar) | Carbon dioxide (CO2) | 40% – 100% | — | 80% – 100% | Yes |
Argon (Ar) | Xenon (Xe) | 0% – 100% | 0% – 3% | 99% – 100% | |
Nitrogen (N2) | Argon (Ar) | 0% – 100% | 0% – 3% | 97% – 100% | Yes |
Nitrogen (N2) | Hydrogen(H2) | 0% – 100% | 0% – 2% | 99.5%– 100% | Yes |
Oxygen (O2) | Nitrogen (N2) | 0% – 100% | 0% – 15% | 85% – 100% | Yes |
Oxygen (O2) | Argon(Ar) | 0% – 100% | 0% – 2% | 97% – 100% | Yes |
Oxygen (O2) | Carbon dioxide (CO2) | 0% – 100% | 0% – 3% | 96% – 100% | Yes |
Methane (CH4) | Nitrogen (N2) or air | 0% – 100% | 0% – 2% | 96% – 100% | Yes |
Methane (CH4) | Argon (Ar) | 0% – 100% | 0% – 1.5% | 97% – 100% | Yes |
Neon (Ne) | Argon (Ar) | 0% – 100% | 0% – 1.5% | 99% – 100% | |
Helium (He) | Nitrogen (N2) or air | 0% – 100% | 0% – 0.8% | 97% – 100% | Yes |
Helium (He) | Argon (Ar) | 0% – 100% | 0% – 0.5% | 98% – 100% | Yes |
Krypton (Kr) | Argon (Ar) | 0% – 100% | 0% – 2% | 96% – 100% | |
Deuterium gas (D2) | Nitrogen (N2) or air | 0% – 100% | 0% – 0.7% | 96% – 100% | |
Deuterium gas (D2) | Helium (He) | 0% – 100% | 0% – 5% | 70% – 100% | |
Sulfur hexafluoride (SF6) | Nitrogen (N2) or air | 0% – 100% | 0% – 2% | 96% – 100% | |
Nitrogen Dioxide (NO2) | Nitrogen (N2) or air | 0% – 100% | 0% – 5% | 96% – 100% | |
Extinguishing gas (R125) | Nitrogen (N2) or air | 0% – 100% | 0% – 5% | 98% – 100% |
Application case list:
No. | Industry | Tasks | Measurement | Range | Background Gas |
1 | Chemicals | Hydrogen as impurity | H2 | 0-0,5% | Ar, N2, O2 |
2 | Chemicals | Hydrogen production by electrolysis | H2 | O2 | |
3 | Chemicals | Ammonia (NH3) production | H2 | NH2, Air | |
4 | Chemicals | Fertilizer production methanation furnace and ammonia (NH3) converter export | H2 | 50-100% | N2, CH4, NH3, Ar |
5 | Air Separation, Chemicals | Hydrogen purity | H2 | 99-100% | N2, O2, HC, Air, SIH4 |
6 | Air Separation, Chemicals | Argon refining process | H2 | Ar | |
7 | Metallurgy | Annealing furnace H2, N2 anti-oxidation | H2 | N2, ppm O2 | |
8 | Metallurgy | Blast furnace gas | H2 | 0-20% | N2, CO, CO2, H2O |
9 | Metallurgy | Blowing Oxygen Furnace (BOF) | H2 | 0-10% | N2, O2, H2O, O2, CO, CO2, Fuel gas |
10 | Metallurgy | Pig iron for steel plants | H2 | % | |
11 | Metallurgy | Heat treatment H2, N2 | H2 | 0-5% ; 10%; 20% | N2, ppm O2 |
12 | Metallurgy | Protective Gas | H2 | Air, N2 | |
13 | Metallurgy | Hydrogen removal, monitoring of H2 discharge from the metal melt | H2 | N2 | |
14 | Chemical & Pharmaceutical | Quality Inspection | Impurity | Ar | |
15 | Glass production | Flat glass production | H2 | 0-10% | N2 |
16 | Food & Beverage, Medical Technology | Gas Mixing | |||
17 | Semiconductor Industry | Monitoring Process | H2 | 0-8% | Ar |
18 | Power plant | Turbine Generator | H2 | 0-100% | CO2 or Ar |
19 | Power plant | Turbine Generator | Air | 0-100% | CO2 or Ar |
20 | Power plant | Turbine Generator | H2 | 90-100% | Air |
21 | Power plant | Turbine Generator | H2 | 90-100% | Air |
22 | Power plant | Turbine Generator | H2 | Air | |
23 | Nuclear Power | Nuclear energy, monitoring deuterium in the air (D2) | D2 | 0-5% | D2, Air |
24 | Nuclear Power | Nuclear power plant, vacuum dragging reconstructor after condenser | H2 | 0-5% | N2, O2 |
25 | Nuclear Power | Nuclear power plants, hydrogen propagation analysis to avoid flammable atmosphere | H2 | 0-20% | Air |
26 | Petrochemical | Acetone, phenol, isopropylbenzene production | H2 | 50-100% | N2, CH4 |
27 | Petrochemical | H2 production from isocyanate in feed gas | H2 | 0-1Vol% | CO |
28 | Petrochemical | Aromatic lift gas tube, N2 header and regulator hopper | HC, H2 | 0-15% 0-1% | НС |
29 | Petrochemical | Caprolactam production H2 purity | H2 | 70-100% | N2, ppm NH3, ppm CO |
30 | Petrochemical | Hydrocracker unit cycle gas compressor | H2 | 50-100% | Hydrocarbons |
31 | Petrochemical | Hydrocracker make-up gas | H2 | 50-100% | Hydrocarbons |
32 | Petrochemical | Hydrocracker downstream collection point | H2 | 50-100% | Hydrocarbons |
33 | Electrical industry | Welding | H2 | N2 | |
34 | Life Sciences & Medical Applications | Nitrous oxide anesthetic dose N2O | N2O | N2 | |
35 | Automotive, Power Generation, Renewable Energy | Fuel Cell | H2 | O2, N2 |
Product datasheet: Thermal Conductivity Gas Analyzer 
, if you need more information, please contact us at sales@mzdd.de.
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