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Thermal Conductivity Analysers

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Thermal conductivity gas analysers measure the concentration of H2, He and Ar gases in a given atmosphere. These gas analysers are used, for example, in semiconductor production, leak detection in industrial gas systems and air quality monitoring. Thanks to their reliability and accuracy, thermal conductivity gas analysers ensure the quality and safety of industrial processes.


 

Thermal Conductivity Gas Analyser ZAF and ZAFE

Thermal Conductivity Gas Analyser ZAF and ZAFE

Reliable process control for furnaces, metal industry, semiconductor and gas separation.

The analyser continuously measures the concentration of gases such as H2, He, and Ar with high stability.
It is also available in a version for hazardous areas (for countries outside the European Union): ZAFE certified Ex NEPSI.

 

 


 

Principle of the thermal Conductivity Gas Analyser Principle of the thermal Conductivity Gas Analyser

Because the thermal conductivity is different among gas components, when there is a change in the concentration of the component under measurement, the thermal conductivity of the sample gas will change to affect the temperature of the platinum wire.

The gas analyser uses the temperature change to determine the gas concentration.

 

Features

  • Easy-to-see LCD
  • RS-232C Modbus® (option)
  • Auto calibration (option)
  • Interference compensation (option)
  • Concentration alarm output (option)
  • Two switchable ranges (option)
  • Line voltage lies within 100 V to 240 V AC, 50/60 Hz.
  • Flame proof  version available for countries outside of European Union : ZAFE.

 

Applications

  • H2 monitoring in semiconductor manufacturing equipment, hydrogen generation equipment, calcining furnaces
  • H2 measures for hydrogen generators
  • H2 measurements for furnaces
  • Ar, He or CH4 measurements for gas production
  • He measurements for superconduction
  • Ar measurements for separation

 

Specifications

PrincipleThermal conductivity
ComponentsHe, Ar, H2, CH4, CO2
Measurement rangeDepends on components and ranges
Repeatability±1% FS
Linearity±2% FS
Response time (for 90%)≤ 60 s (standard), ≤ 10 s (fast response version)
Output signal4–20 mA DC, 0–1 V DC, or 0–10 mV DC
Contact output (option)5 SPST-NO contacts: during calibration, H/L alarm, etc.
Contact input (option)3 volt-free contacts; output hold, range switching, auto-calibration start
DisplayBacklit LCD
Communication (option)RS-232C Modbus®
MountingPanel mounting
Power supply voltage100–240 V AC, 50/60 Hz
Dimensions192 (W) × 240 (H) × 213 (D) mm
WeightApprox. 5 kg

 

Measurable components and ranges

Sample gasReference gas*1Measurement rangeMaximum range
ratio
H2N2, (CO2, Ar, He)0 … 3, 5, 10, 20, 50, 80, 100%
100 … 90%, 100 … 80%
1 : 10
HeN2, (CO2, Ar), O2, Air0 … 5, 10, 20, 30, 40, 50, 80, 100%
100 … 90%, 100 … 80%
1 : 10
ArN2, O2, Air, (He)0 … 10, 20, 50, 80, 100%
100 … 90%, 100 … 80%
1 : 5
CH4N2, (CO2, Ar, He)0 … 20, 40, 50, 60, 80, 100%
100 … 80%
1 : 5
CO2N2, O2, Air, (He)0 … 10, 20, 50, 100%
100 … 90%
1 : 5

*1: Those in parenthesis need consultation. Measurement of H2 included in O2 is not available.


 

Thermal Conductivity Analysers documentation