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PAF 112 – Cabin Air Filter Test System

The Adsorption Test Stand PAF 112 for Air Filters for Passenger Compartments is used for quantification of adsorption capacity or desorption behaviour of filters. The design of the Adsorption Test Stand PAF 112, the test procedure and data acquisition have been based on the draft standard DIN 71460-2 and ISO 11155-2 standard for measuring the dynamic gas adsorption.

The test section and associated ductwork are fabricated from stainless steel. Different sizes of filter media samples and elements can be tested and are mounted in a special adapter.  A window in front of the test section allows visual observation of the sample during the test. A pair of mass flow controllers is used for metering gaseous components from gas cylinders and a new, sophisticated, dosing unit for liquid gas components has been developed specifically for this application. This is based on evaporation of a droplet spray atomized by means of a two-stream nozzle fed from a µl-dosing pump. The gas concentration can be measured downstream of the filter. An exhaust system by-passing the test channel facilitates maintaining a very stable gas dosing.

Test acc. to standards DIN 71460-1 and ISO/TS 11155-1 can be carried out using Topas Particle Filtration Test Rig PAF 111.

For filter tests both acc. to standards DIN 71460-1, ISO/TS 11155-1 and E DIN 71460-2, ISO 11155-2 Topas has designed filter test rig PAF 113 (to be seen on adjoining picture) combining all features of test rigs PAF 111 and PAF 112.


Integral parts of test procedures

  • Differential-Pressure measurement
  • Adsortion tests according standard ISO 11155-2 (E DIN 71460-2)
  • Adsorption/Desorption measurement
  • User-defined test procedures
  • Operator is guided through test routines
  • Modular system
  • Versatile
  • State of the art

Control software PAFWin

  • Automatic test procedures in accordance with issued standards
  • Manual control for service, calibration procedures and research applications
  • Data monitor for long term investigations
  • Sample and test data base
  • Test dust and test gases data base
  • Data analysis and statistical calculations
  • Data copy & paste, Dynamic Data Exchange DDE
PAF 112 - Cabin Air Filter Test System
Air flow70…700 m³/h
Differential pressure0…1000 Pa
Filter adapter300 mm x 600 mm
SensorsTemperature, relative humidity, atmospheric pressure
Gases• n-Butane 80 ppm (C4H10)
• Toluene 80 ppm (C6H5CH3)
• Sulphur dioxide 30ppm (SO2)
• Ammonia 30 ppm (NH3)
• Nitrogen (purging)
Gas analyser• FTIR spectrometer, Equinox 55 (IFS 28), Bruker
• FID gas detector, Bernath Atomic
• NDIR, CLD devices
• Other on request
Power supply3 x 230 VAC, 16 A
Test rig dimensions in mm1800 x 1100 x 2500

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User Manual


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