Dekati® eFilter™


Dekati® eFilter™ is completely new instrument that adds real-time PM detection into a standard gravimetric filter holder. The Dekati® eFilter™ assembly is approximately the same size as a normal PM  filter holder and it fits directly into all existing exhaust PM filter sampling systems including CVS tunnels.  In addition to the standard gravimetric filter measurement, the Dekati® eFilter™ gives a real-time signal throughout the filter sampling period which allows monitoring PM accumulation on the filter during different  stages of the filter sampling. This real-time signal changes the standard filter holder into a sensitive,  dynamic measurement instrument for modern routine emission measurements.



Dekati® eFilter™ features include

  • Standard gravimetric filter measurement that meets
  • US EPA requirements
  • Compatible with existing gravimetric PM measurement filter holders and sampling systems
  • Automated and sensitive real-time PM measurement
  • Battery operated with internal pump for real-time PM measurement
  • Fully automated operation; gravimetric filter flow automatically starts the real-time measurement
  • Plug-and-play and maintenance free instrument
  • Replaceable real-time detection module
  • Can be used inside a 47 °C cabinet
  • Touch screen user interface
  • Separate charging station with automatic flow calibration
  • Data saved to a micro-SD memory card

The Dekati® eFilter™ was first developed for engine emission measurements where it is used to replace the standard gravimetric filter holders. The eFilter™ real-time signal is used for controlling and verifying the quality of the gravimetric measurement and detecting high emitting phases in engine test cycles. Besides engine testing, the eFilter™ can be used in any other application where gravimetric measurements are made to replace the traditional filter method. These applications include e.g. air quality measurement both indoors and outdoors and industrial emission measurements.



            eFilter™ and DMM measurement during a NEDC cycle

Primary sample flow rate 20-100 lpm
Secondary sample flow rate 0.5 lpm, automatically adjusted
Sensitivity approx. 1 μg/m3 or 1000 #/cm3 for 70 nm particles
Saving interval 1 s
Operating conditions 10-50 °C
Filter holder US EPA 40 CFR Part 86 Subpart N
Data transfer Micro-SD card, USB
Dimensions H225 x W85 x L90 mm
Weight 1.5 kg
Inlet/outlet Swagelok® quick connectors, G1/2" thread

Dekati® eFilter™ in the docking station

Dekati® eFilter™ is a 47 mm gravimetric PM filter holder with an integrated real-time detection module. The whole Dekati® eFilter™ assembly is in one compact single unit with automated operation. The real-time detection module is battery operated and it includes a diffusion charger with electrical detection for sensitive real-time measurement.

The real-time PM detection starts automatically when standard filter sampling is started requiring no actions from the operator. A separate pump is used in the real-time detection module to make sure the gravimetric filter sampling is not affected by the real-time measurement.


Dekati® eFilter™ Operating Principle



Dekati® eFilter™ Brochure



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