Protein and nitrogen analysis system for laboratories
Streamline your nitrogen and protein analysis with precision titration, efficient digestion, and automated sampling capabilities, ensuring high-throughput and reliable results for a variety of liquid and solid samples.

Automates Nitrogen and Protein Analysis Procedures
The KjelMaster K-375, coupled with the KjelSampler K-376 and K-377 from BUCHI, revolutionizes nitrogen and protein analysis workflows with its refined automation and integration capabilities. This system excels in accurately processing food, beverage, chemical, and environmental samples through meticulous digestion, distillation, and titration processes. Designed for laboratory environments, it handles up to 48 samples with a flexible, bench-top format, ensuring optimized lab space and continuous high-throughput operations. Its intuitive color touch screen facilitates seamless operation, while the integrated KjelLink PC software supports advanced programming and bidirectional data exchange. Key features include automatic reagent handling, eliminating exposure to harmful chemicals, and IntelliDist smart distillation mode, offering reproducible results with reduced preparation time. Compatible with various sample sizes, the system also supports a range of material options to ensure chemical compatibility and extend glassware lifespan, providing a comprehensive, reliable solution for demanding nitrogen analysis requirements.
Benefits
- Enhances productivity with continuous high-throughput sample processing.
- Minimizes operator exposure to chemicals with automated reagent handling.
- Conserves bench space with compact, flexible system design.
- Delivers reliable and reproducible results through the IntelliDist smart distillation mode.
- Supports diverse applications with versatile sample and method compatibility.
- Applications
- Food,Chemicals,Beverage,Cosmetics,Environmental analysis,Pharmaceutical
- End products
- Wastewater samples,Nitrogen fertilizers,Milk powder,Moisturizers,Plant-based protein drinks,Effervescent tablets,Bakery products,Beer
- Steps before
- Milling,Sample Preparation,Digestion
- Steps after
- Data Management,Compliance Verification,Sample Analysis
- Input ingredients
- nitrogen samples,protein samples,Total Kjeldahl Nitrogen,Total Volatile Basic Nitrogen,nitrate,nitrite,organic nitrogen,ammonia,urea,casein,non-protein nitrogen,Devarda mixture
- Output ingredients
- analyzed nitrogen content,analyzed protein content,analyzed Total Kjeldahl Nitrogen,analyzed Total Volatile Basic Nitrogen,analyzed nitrate,analyzed nitrite,processed organic nitrogen,processed ammonia,processed urea,measured casein content,evaluated non-protein nitrogen,quantified samples with Devarda mixture
- Market info
- Buchi is renowned for its expertise in laboratory and industrial solutions, particularly in producing high-quality equipment for chemical analysis and lab processes, known for precision and reliability in the pharmaceutical, chemical, and food industries.
- Adjustable Steam Power
- 30 – 100%
- Autosampler Positions
- 24 or 48
- Sample Parameters
- Total Kjeldahl Nitrogen,Total Volatile Basic Nitrogen,nitrate,nitrite
- Sample Positions
- 0 for KjelMaster K-375,24 for Sampler System K-375/376,48 for Sampler System K-375/377
- Measuring Range
- 0.02 – 220 mg N
- Recovery
- >99.5% (1 – 200 mg N)
- Screen
- 8.4 inch color touch
- Titration
- Potentiometric / Colorimetric
- Rack Compatibility
- Yes,with K-446 / K-449 for Sampler System
- Automation level
- High (manual or automatic operation)
- Batch vs. continuous operation
- Batch
- Cleaning method
- Automated reagent handling,no manual cleaning needed
- Usability
- Perfect usability with a free choice of methods
- Throughput
- High,up to 48 samples using KjelMaster K-377
- Flexibility
- Compatible with different sample tube sizes (100 mL,300 mL,500 mL)
- User level management
- Available
- Data Management
- Sophisticated,with KjelLink PC software for advanced programming
- Process Synchronization
- Perfect synchronization from digestion to automated sampling
- Safety
- Safe handling with no contact with harmful chemicals
- Operating Interface
- Large color touch screen for intuitive system operation
- Energy efficiency
- Adjustable steam power (30-100%)
- Corrosive resistance (e.g. acids)
- Yes
- Cleanability
- Automated,CIP-compatible
- Density/particle size
- Compatible with 0.5–2.5 g/cm³,50–1000 µm
- Sample types
- Solid / Liquid
- Compact footprint
- Smallest bench top system
- Control panel type
- 8.4 inch color touch screen
- Discharge method
- Automated sampling
- Sampler positions
- 24 or 48 sample positions
- Steam output
- Adjustable 30-100%
- Control panel type
- 8.4 inch color touch screen
- Automation Level
- High-throughput processing with autosampler
- User level management
- Yes
- Rack compatibility
- With K-446 / K-449
- Compatibility with sample tubes
- 100 mL,300 mL,500 mL
- Synchronized process
- From digestion to automated sampling
- Flexible operation
- Automatic or manual operation
- Independent racks
- Yes,KjelMaster K-377