Speed up manual Kjeldahl digestion by processing up to 6 samples in simultaneously – using a flexible serial heating unit that suits your process. Even large volumes or strongly foaming samples can be digested easily because you can use Kjeldahl flasks of between 50 ml and 750 ml.

Benefit from our 130 years of experience with Kjeldahl instruments. The functional, robust design keeps your operating costs low while minimizing the likelihood of downtime. The compact, low build of the digestion apparatus ensures work safety and ergonomic operation – there’s no need to handle aggressive acids overhead.

The digestion apparatus adapts flexibly to your requirements and can be extended according to your needs, for example to operate in combination with the automatic steam distillation system VAPODEST.


Work more efficiently and reproducibly

Minimize your waiting time when processing small or incomplete batches. Our serial heating unit with its 6 individually controllable hot plates lets you process up to 6 different samples simultaneously. The high-performance heater gets your samples up to temperature quickly and efficiently.

Get started efficiently with the complete set we offer. From the flask to all connecting hoses, everything is included. Leave installation to the professionals: equipment for the 500 ml and 750 ml Kjeldahl flasks should be connected by an electrician.


Increase the automation level of your Kjeldahl process step by step

The digestion apparatus is easy to expand:

  • Increase the sample throughput by using several serial heating units.
  • Conveniently transfer your samples in the same flask to the automatic steam distillation system VAPODEST. Avoid cumbersome decanting and work more efficiently.

Protect yourself and your fume hood: connect the powerful VACUSOG gas scrubber or the TURBOSOG fume suction washer directly to the digestion apparatus. They render corrosive acidic fumes harmless as soon as these arise.



Dimensions (W x D x H) 600 x 250 x 300 mm (50 ml to 250 ml)
900 x 250 x 300 mm (500 ml and 750 ml)
Weight 8 – 15 kg, depending on version
Scope of delivery KI serial heating unit
1 set of Kjeldahl flasks
Glass exhaust manifold with adapters
2 holders for glass exhaust manifold
Operating manual


Downloads: Brochure Manual Digestion