Dekati® Axial Diluter


The Dekati® Axial Diluter DAD-100 is a simple and cost-effective dilution tool for any dilution task. Especially designed for use with Dekati® Instruments, the DAD-100 is very simple to install into any sampling or measurement system. All-stainless steel design makes it also possible to heat the diluter up to 500°C.





Dekati® Axial Diluter features

  • Available with different sample flows and dilution factors
  • Low consumption of dilution medium (~9 lpm), which is highly beneficial in on-board or remote applications.
  • Low losses for all particle sizes from 10 nm to 10 μm.
  • Extremely robust, simple and easy to clean.
  • Available as heated and non-heated versions for dilution of any particle sample.

Undiluted sample flow 0.1-10 lpm (1-3 lpm typical)
Dilution air flow 1-100 lpm (10-30 lpm typical) Check instrument datasheet for exact value
Outlet flow Undiluted sample flow + Dilution air flow
Dilution factor Delivered with fixed setting as agreed with customer
Undiluted sample temperature range Up to 500 °C
Undiluted sample pressure range Check measurement instrument specifications
Operation pressure Check instrument datasheet
Material AISI 316 (Stainless Steel)
Inlet pipe 12 mm
Outlet pipe 12 mm
Pressurised air inlet 12 mm female Swagelok®
Pressure sensor range 0-4000 mbar abs


The operating principle of the DAD-100 is based on axial dilution of the sample in which the dilution air is introduced as ‘sheath flow’ around the raw sample. This type of dilution is beneficial due to very low losses for all particle sizes. In order to calculate the dilution factor, the amount of sample drawn by the measurement instruments and the flow of dilution air need to be know accurately. The amount of dilution air is controlled accurately in the DAD-100 with a high-quality needle valve, which is adjusted and locked into place during calibration at Dekati. If the DAD-100 is used with Dekati® Instruments, the amount of drawn sample is very accurately known and can be found in the instrument specific data sheet. The DAD-100 is delivered with a calibration certificate and an easy-to-use Excel® sheet which can be used to calculate the dilution factor in any conditions. As the DAD-100 dilution factor also depends on the sample pressure, this diluter should be applied to measurement conditions where the sample pressure remains constant throughout the measurement.

Dekati® Axial Diluter brochure

Available in customer pages section:

DAD Manual
Data calculation spread sheet
Spare part catalogue


Can’t find what you’re looking for?

Contact Dekati technical support: support (at)

Contact Dekati sales: sales (at)


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