Kjeltec™ 8400

This fully automated Kjeldahl analyser is a highly versatile distillation and titration instrument, using the global reference method for protein determination. Ensures optimal throughput and the highest safety standards for use in any laboratory.

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Kjeltec 8400
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Fully automated (distillation, colorimetric titration, calculation). Upgradeable to auto sampler. Easy data handling with Compass software.
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Sample type

Feed, feed ingredients, forage, pet food, grain, cereal, oil seeds, meat, meat products, milk, dairy products, beer and beer ingredients.
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Nitrogen, protein, Non Protein Nitrogen (NPN) and volatiles (TVBN and more).

Are you ready to discuss what capacity and level of automation is relevant for your laboratory?

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“Now we can handle more samples and get the results earlier with less work”

Learn how Denofa soya crushing plant in Norway have achieved more consistent results with automated Kjeltec™, while saving time and labour.


  • Unmatched Accuracy

    The superior performance of a KjeltecTM titration system is based on colorimetric measurement of a precise chemical reaction for end-point detection. Accuracy is assured time after time with the additional benefits of long-term stability, wide working range, speed and simplicity without the need for repeated and costly calibration procedures.
  • Safety features

    A fast tube draining system removes the need for handling hot reagents after distillation. Interlocked safety door which must be closed with a tube in place before the unit will operate. Cooling water flow is controlled automatically and a temperature sensor stops the unit if the distillate is too hot. Sensors monitor tube in place, safety doors, reagent levels, water level and over-pressure in the steam generator providing safe use. 



  • Autosamplers

    An optional 20 or 60 place Autosampler provides the benefits of automation even at lower sample throughputs. Just load your sample racks directly from the digestion block and KjeltecTM will perform accurate analysis unattended for more than four hours.
  • SAfE

    The patented SAfE* technology improves safety by a mixing procedure, reducing the exothermic reaction between alkali and acid during distillation and removing the need for manual pre-dilution.

     *Steam Addition for Equilibration

Overview of Kjeltec™ models

The Kjeltec™ series consists of four models: Kjeltec™ 8100, 8200 and 8400 and KT 200 Kjeltec™ with different levels of automation.

200 8100 8200 8400
Variable output steam generator  x  x  x
Water saving system  x  x  x
Cooling water flow control  x  x  x
Distillate temperature monitor  x  x  x
Polypropylene splash head x  x  x  x
Polypropylene tube emptying vessel x  x  x
Bellows pumps for reagent addition x  x  x  x
Automatic alkali addition x  x  x  x
Automatic dilution water addition

 x  x  x
Automatic receiver solution addition    x  x
SAfE - Steam Addition for Equilibration x  x  x  x
Tube emptying/Waste collection  x  x  x
Reagent alarms  x  x  x
Removable drip tray x  x  x  x
Automatic safety door    x  x
Interlocked safety door  x  x  x
Removable safety door  x  x  x
Tube-in-place safety  x  x  x
Tube replacement sensor  x  x  x
Colorimetric titration system    Opt.  x
External titrator connection    Opt.  Opt.
Interchangeable burette      x
Titration bypass      x
Results calculation      x
Storage of raw data in instrument      40 batch
Data management PC software      x
Storage of raw data with PC software      Unltd
Ethernet connection for PC      x
Balance      x
Printer      x
Autosampler system 8420 or 8460      Opt.
Kjeltec autosampler

Benefits of automation

An optional 20 or 60 place Autosampler provides the benefits of automation even at lower sample throughputs. Just load your sample racks directly from the digestion block and Kjeltec™ will perform accurate analysis unattended for many hours.

Technical specification

Performance data at 230 V
Autosampler capacity Kjeltec™ sampler 8420, 1 rack with 20 Kjeldahl tubes 250 ml or 400 ml
Kjeltec™ sampler 8460, 3 racks with 20 Kjeldahl tubes 250 ml or 400 ml
Analysis time 3.5 minutes at 30 mg N (6.5 minutes at 200 mg N)
Distillation capacity

~ 40 ml/min

Measuring range 0.1 – 210 mg N
Reproducibility  1% RSD (including the digestion step)
Installation requirements
Power supply 200 – 240 V 50 – 60 Hz
Tolerable voltage variation ± 10 %
Power consumption 2 200 W
Water consumption

(during distillation only) 3 l/min at water temp of 25°C

*1 l/min at water temp of 15°C
* Circulating Cooler recommended at >25°C

Weight net

Kjeltec™ (8100, 8200, 8400)

Sampler Kjeltec™ 8420

Sampler Kjeltec™ 8460

Dimensions: (W×D×H) 480 × 580 × 690 mm 645 × 840 × 900 mm 1000 × 800 × 900 mm

Brochures and Papers

Companies using this solution