KN Kjeltec Analyzer
OVERVIEW
The Kjeltec KN series for simple and safe distillations with different levels of automation. The KN Kjeltec Analyzer, provides the ultimate in automated Kjeldahl analysis .

FEATURES & BENEFITS
Testing automation:
- Acid addition, alkali addition, distillation, titration, result calculation and printout are done fully automatically, automated sample measurement
Sample boil-off prevention:
- Sample dilution and alkali addition methods can be arbitrarily set according to the user's sample to prevent the occurrence of sample boil-off and improve the measurement accuracy
Anti-crystallization of alkali pump:
- Self-developed alkali pump anti-crystallization technology, solve the problem of crystallization of alkali pump, improve the reliability of the instrument
Steam Adjustable:
- Steam pre-addition mode, steam flow rate (1~100%) can be automatically adjusted to better achieve the distillation effect and ensure the accuracy of the experiment
Dual mode titration:
- Dual mode titration, the combination of coarse and fine titration will ensure high accuracy of results; titration methods comply with AOAC, EPA, Din, ISO and other certified methods.
- The titration is performed by the officially approved color titration method.
Endpoint accuracy:
- Endpoint color user fine-tuning technology and endpoint color learning technology ensure accurate test adaptability and a more human touch
Titration cup emptying:
- The titration cup is automatically emptied and cleaned after the sample is distilled.
Permissions and tracking:
- Five login accounts, three levels of access, traceability of operation logs and traceability of test results
Safety protection:
- Multiple intelligent protections such as digestion tube position detection, safety door, condensate detection, steam generator overheating, overpressure protection, liquid level detection, etc. ensure the safety of the instrument and the operator. operator safety Translated with www.DeepL.com/Translator (free version)

APPLICATION
Can be used for the determination of nitrogen or protein content in Any type of dairy product.
SPECIFICATIONS
Model | KN580 | KN680 |
Measurement range | 0.1-250mgN(mgN) | 0.1-250mgN(mgN) |
Measurement speed | Conventional 3-5min/ sample | Conventional 3-5min/ sample |
Titration accuracy | Titration 1μl/ step | Coarse titration 1μl/ step Fine titration 0.016μl/ step |
Sample weight | solid ≤ 5g liquid ≤ 20mL | solid ≤ 5g liquid ≤ 20mL |
Reproducibility | 0.3% Relative error | 0.3% Relative error |
Recovery | 99.5% or more 1-250mgN | 99.5% or more 1-250mgN |
Automaticity | Automatic addition of water dilution automatic addition of alkali automatic addition of boric acid, distillation Titration and calculation programmable control automatic printing of results |
Titration while distilling | Optional | Yes |
Interface | —— | USB LAN RS232 WIFI |
Compatibility | Ammonium nitrogen | Ammonium nitrogen, optional: high state nitrogen nitrate nitrogen |
Nitrogen tube evacuation | Optional | Automatic |
Auto titration | AOAC-compliant color endpoint determination method |
Storage capacity | Data storage >100,000 sets of solution storage >10000 |
Power Voltage | Power: 1800W Working voltage AC220V 50Hz |
Volume | 500mm*450mm*750mm | 500mm*450mm*750mm |
Weight | 35KG | 35KG |