NK9870B Fully Automatic Kjeldahl Analyzer

The Kjeldahl method is a classic technique for determining nitrogen.

It is widely used for the measurement of nitrogen in soil, food, livestock, agricultural products, feed, and other nitrogen containing compounds. The process for sample analysis using this method involves three main steps: sample digestion, distillation and separation, and titration analysis.

Our company is one of the creators of the national standard GB/T 33862-2017 for Fully (Semi) Automated Kjeldahl Nitrogen Analyzer. Therefore, the Kjeldahl analyzer series products we develop and manufacture comply with both the GB standard and relevant international standards.

Analysis Range: 0.1 - 240 mg N


Precision (RSD): ≤0.5%


Recovery Rate: 99-101%


Minimum Titration Volume: 0.2μL/step


Titration Speed: Settable from 0.05 - 1.0ml/s


Distillation Time: Settable from 10 - 9990 seconds


Sample Analysis Time: 4-8min/(cooling water temperature 18℃)


Titrant Concentration Range: 0.01 - 5 mol/L


Titrant Concentration Input Method: Manual input / instrument internal standard


Titration Mode: Standard / Simultaneous Steam and Drip


Titration Cup Capacity: 300ml


Touch Screen: 10-inch color LCD touch screen


Computer Operating System developed under Windows10


Bluetooth communication, data transmission, remote monitoring


23-inch all-in-one desktop computer


Data Storage Capacity: 1 million data sets


Printer: 5.7CM thermal paper automatic cutting printer


Communication Interface: 232/ethernet/computer/electronic balance/cooling water/

reagent tank liquid level


Waste Disposal Mode of Digestion Tube: Manual/Automatic Discharge


Steam Flow Adjustment: 1% - 100%


Safe Alkali Addition Mode: 0-99 seconds


Automatic Shutdown Time: 60 minutes


Operating Voltage: AC220V/50Hz


Heating Power: 2000W


Main Unit Size: Length: 500 * Width: 460 * Height: 710mm


Cooling System Temperature Control Range: 5℃-20℃


Cooling Tank Capacity: 6L


Circulating Pump Flow: 10L/min


Lift: 10 meters


Operating Voltage: AC220V/50Hz


Power: 850W