Kjeldahl, Fat & Crude Fiber Apparatus

Kjeldahl Nitrogen Determination Digestion and Distillation Apparatus are offered in classical, rapid and micro models. Kjeldahl analysis is frequently used to determine the protein content of agriculture products. Goldfisch Fat Extractors are used to determine the fat and oil content of samples and are listed in AOAC methods. Crude Fiber Apparatus determine the crude fiber content of feed, food and other agriculture products and are AOAC listed.

Below is a brand listing of the Kjeldahl, Fat and Crude Fiber Apparatus available from Labconco. Click on any brand to find out more about it. If you are still unsure which brand is best for your application, use the Advanced Product Search to help you narrow down your choices.

Downloadable Citation Library
Read full publications featuring the Kjeldahl Fat and Crude Fiber Apparatus.

Open Combination Kjeldahl Distillation Digestion Unit

Helpful Resources for Product Use and Selection

Lab and Science Articles

Helpful articles to assist in product selection, use, and configuration.


Visual guides to safety best practices and product selection.


Keep up with the latest Labconco news and happenings.

Classical Macro Kjeldahl Apparatus

Open and hooded combination Kjeldahl units have digestion and distillation components for nitrogen determination in one apparatus. Separate digestion and distillation units are also available. 

Micro Kjeldahl Apparatus

Compact, benchtop Kjeldahl digestors and distillation units process 10 to 30 milliliter samples.

Rapid Kjeldahl Apparatus

These macro Kjeldahl units are designed for quick, efficient digestion and distillation of samples in 250 ml tubes.

Models Available

Agro-chemistry apparatus include classical macro, micro and rapid Kjeldahl apparatus, Goldfisch Fat Extractors and Crude Fiber Apparatus.

Literature & Resources

  • Brochures

    • A Guide to Kjeldahl Nitrogen Determination Methods and Apparatus

      Provides a background on Kjeldahl nitrogen determination methods and apparatus. Digestion, distillation and titration are detailed. A glossary of terms is included.

      View Files

    • Classical and Rapid Kjeldahl, Fat and Crude Fiber Apparatus Catalog

      Provides specifications and dimensional data on our Classical Kjeldahl units, Micro and Rapid Digestors, RapidStills I and II, Goldfisch Fat Extractors and Crude Fiber Apparatus.

      View Files

  • En Español

    • Dispositivos para análisis Kjeldahl, análisis de grasa y análisis de fibra cruda

      Proporciona beneficios e información de pedido para el aparato Kjeldahl clásico, el Micro Digestor, el RapidStill I, el aparato de Fibra Cruda, el Extractor de Grasa Goldfisch, el Rapid Digestor de 4 y 25 plazas, y el RapidStill II.

      This Spanish-language brochure contains an overview, specifications and ordering information on Kjeldahl Digestion and Distillation Apparatus, Micro Digestor, RapidStill I, Crude Fiber Apparatus, Goldfisch Fat Extractor, Rapid Digestor-4, Rapid Digestor-25 and RapidStill II units. Ordering information on accessories is also included.

      View Files

  • Installation Qualification / Operation Qualification

    • Installation Qualification/Operation Qualification for Goldfisch Fat Extractors

      For validation of predetermined Goldfisch Fat Extractor specifications. Provides a checklist of installation and operation qualifications to complete when beginning operation on new or used Fat Extractors.

      View Files