BBT 143 – Complete Blow-by Test Stand

The Blow-By Test Rig BBT 143 is a compact measuring system for the determination of the oil droplet content of crankcase gases (blow-by) at engine test rigs. It combines the precision of a gravimetric measurement of the Gravimetric Measuring GMS 141 with the speed of an optical concentration measurement of the Process Aerosol Photometer PAP 610.
Due to the design of the blow-by test rig and of the stand-alone devices, these measurements can be performed very efficiently at engine test stands. Combining the Gravimetric Measuring System GMS 141 with the Process Aerosol Photometer PAP 610, oil consumption measurements for engine characteristic maps can be performed with minimum efforts and time.
Additionally, the Process Aerosol Photometer PAP 612  provides the opportunity to measure oil films and oil gushes in pipes e.g. at tilt test stands.


  • Fast and reproducible determination of the oil content in blow-by aerosols in a large concentration range
  • Integration in engine test rigs
  • Measurement of the full flow of blow-by
  • On-line concentration monitoring of oil mist aerosols
  • Heated measuring chamber of GMS 141 and PAP 610 to avoid condensation
  • Fast photometric measurements of aerosols with low uncertainty by two wavelengths
  • Improved compact and robust design for mobile use, also for field use
  • Straightforward to handle and fast set-up