The  PH4 photometer is our choice for absolute filter leak testing. Leak tests, which are used to verify the ability of an absolute filter to retain particles of a certain diameter, can be carried out using compressed air or a test solution. The test results verify that a filter is installed correctly or, conversely, if it needs to be replaced.



  • High-resolution display.
  • Very long-lasting LED (Light Chamber) lighting: over 20,000 hours of use.
  • Preloaded settings for 7 types of FDA-approved oils.
  • Stable at low aerosol concentrations (≥ 10ug/l).
  • Different types of alarms can be set: acoustic, visual, vibrating.
  • Plug and Play probe – 3 meters long.
  • Port for PC connection with USB interface for tests and reports in accordance with ISO14644-3.
  • Accepts operating voltages all over the world.
  • Supplied with full instruction manual



Discover all the products