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Diffusion dryers 7813 and 7814

GRIMM 7813 | 7814
Diffusion dryers

These devices allow a reproducible reduction of air humidity in flowing gases or drying of aerosol particles. Both models are suitable for sample volume flows in the range 0.3 … 5 l/min. 

  • Aerosol drying with Silica Gel Orange*, color change from orange to white
  • Inlet and outlet with quick coupling (Festo), 8 mm for easy integration in experimental setups
  • Operation in any orientation
  • Two sizes, small and large version to fit needs

* The term "Silica Gel Orange" is a product name of the company Roth

  • Silica Gel Orange* beads allow easy handling
  • Simple regeneration in the dryer cabinet
  • Connection and maintenance possible without tools
  • Compatible with all GRIMM aerosol measuring instruments, e.g. 7811 universal aerosol generator, 5416 CPC, etc.
  • Drying of nebulized aqueous suspensions (PSL) and solutions (NaCl)
  • Drying of wet aerosol
  • Conditioning of atmospheric aerosol
  • Technical data
Drying agentSilica gel beads with indicatorGrain size 2 … 5 mm
Color changeOrange: dryWhite: used, regeneration necessary
Adsorption capacityAt 10% RH: Approx. 6.5 weight%At 80% RH: Approx. 42 weight%
RegenerationAt 130 °C for about 4 hours
Sample flow rate0.3 … 5 l/min
Operating temperature4 … 40 °C
Operating pressure±100 mbar to ambient pressure
Dimensions (Ø x H)7813: 19 x 29 cm (7.5 x 11.4 in)7814: 19 x 50 cm (7.5 x 19.7 in)
Weight7813: 2.3 kg (5.07 lbs) 7814: 7.4 kg (16.3 lbs)