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Kjeltec 8400 Kjeldahl Analyser - Good Condition 2018

The Kjeltec™ 8400 from FOSS is an automatic Kjeldahl analyser for determining nitrogen and protein in the food, agriculture and related industries. Featuring an integrated colorimetric titration system, it delivers outstanding analytical accuracy without repeated recalibrations. This model enables fast distillation, automated calculation and documentation, while ensuring optimal safety thanks to its locked door, temperature control and intuitive touchscreen interface. It is compatible with the 8420 and 8460 autosamplers for unattended operation of up to 60 samples.



Description

Kjeltec™ 8400: precision, autonomy and reliability for Kjeldahl analysis

The Kjeltec™ 8400 from FOSS is a high-performance solution for laboratories that want to perform Kjeldahl analyses in an automated, reliable and safe manner. Designed for the determination of nitrogen and protein in food, feed, agricultural products and animal meal, this model is easy to use and offers proven efficiency. In addition to the automatic distillation functions already found on previous models in the 8000 series, the Kjeltec™ 8400 incorporates a fully automated colorimetric titration module for accurate endpoint detection, with integrated result calculation and computer management via Compass software.

This technology provides users with long-term stability, a wide working range (0.1 to 200 mg N) and considerable time savings without the need for frequent recalibration of the instrument. Maintenance is also easy: the titration cell cleans itself automatically after each cycle, ensuring a clean system and reducing manual handling. The interchangeable burette allows for quick titrant changes, and the system effectively limits air bubble formation, optimising performance right from the start.

In terms of safety, the Kjeltec™ 8400 is equipped with patented SAfE (Steam Addition for Equilibration) technology, which minimises exothermic reactions between acid and base. The device can only operate when the safety door is closed with a tube in place, limiting risks to the operator. Sensors continuously check the presence of tubes, reagent levels, distillate temperature and steam boiler pressure.

Connected to a PC via an Ethernet interface, the Kjeltec™ 8400 allows for optimal data recording and traceability. With Compass software, samples can be recorded, tracked and results easily exported to a LIMS system or printed.

To adapt to changing needs, the Kjeltec™ 8400 is compatible with the Kjeltec™ 8420 (20 tubes) and 8460 (60 tubes) autosamplers, allowing unattended operation for more than four hours. The system is therefore scalable, capable of supporting a growing volume of analyses while maintaining rigour and reproducibility.

Features

  • Integrated colorimetric titration with precise endpoint detection
  • Integrated calculation and storage of results
  • Intuitive colour touchscreen
  • Compass software for analysis management and traceability
  • Lockable safety door with tube in place sensor
  • Automatic cooling via water flow control
  • SAfE technology for safe distillations
  • Compatible with 8420 and 8460 autosamplers
  • Automatic cleaning of the titration cell
  • Can be connected to a LIMS system

Technical Details

  • Measuring range: 0.1–200 mg N
  • Analysis time: 3.5 min at 30 mg N / 6.5 min at 200 mg N
  • Distillation capacity: ~40 ml/min
  • Reproducibility: ≤ 1% RSD (including digestion)
  • Efficiency: > 99.5% between 1–200 mg N
  • Burette volume: 35 ml
  • Burette resolution: 2.4 µl/step
  • Burette speed: > 0.5 ml/sec
  • Drainage: 200 ml in less than 10 seconds
  • Internal storage: 40 batches (unlimited with Compass)
  • Ethernet connection: printer, scale, PC
  • Dimensions (W x D x H): 480 × 580 × 690 mm
  • Weight: 35 kg
  • Power supply: 200–240 V, 50–60 Hz
  • Water consumption: 3 l/min at 25°C / 1 l/min at 15°C
  • Ambient temperature: 5 to 40°C

Compatible Accessories

  • Compass software for data management
  • Titrant tank with piping
  • Level sensor (waste and reagents)
  • Calibration burette and dosing device
  • Adapter for Büchi tubes
  • Racks for autosampler 8420 or 8460 (8 or 20 tubes of 250/400 ml)
  • Digestion tubes (100 to 750 ml)
  • Handling device for digestion tubes
  • 20 L tanks for water, alkali, waste

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