Automatic Kjeldahl Nitrogen Analyzer JK9880, 0-250 mg N (CAT#: STEM-AL2-4112-ZJF)

The JK9880 fully automatic Kjeldahl nitrogen analyzer is an analytical instrument for determining nitrogen in digested samples. It is intended for Kjeldahl-based nitrogen analysis in laboratory testing workflows. The system manages reagent handling and steam distillation as part of the analytical sequence. Sample ammonia is separated during distillation and transferred to the receiving stage for measurement or titration. An integrated autosampling arrangement supports sequential handling of multiple prepared samples. The fluid path is configured for repeated exposure to acidic and alkaline reagents used in Kjeldahl analysis. Protection functions monitor operating conditions and help prevent unsafe or incomplete analytical cycles. The instrument is suited to repetitive nitrogen testing where standardized operation and data consistency are required.

Analysis Range: 0-250 mg N
Range Segments: 0-2 mg N
2-10 mg N
10-100 mg N
100-250 mg N
Indication Error: ±5% at 0-2 mg N
±1% at 2-250 mg N
Repeatability: ±5% at 0-2 mg N
±0.5% at 2-250 mg N
Sample Separation Temperature: 85°C
Analysis Method: Standard curve
Measurement Element: Platinum-carbon conductivity electrode
Volume Setting: Ultrasonic sensor
Fixed Volume: 100 mL ±1.5%
Sample Analysis Time: 4-6 min
Waste Discharge: Automatic/manual
Alkali And Absorption Solution Addition: 0-10 mL
Autosampler Capacity: 20 or 40 positions
Sample Feed: Peristaltic pump
Over-Temperature Alarm:>=90°C
Power Supply: AC 220 V, 50 Hz
Heating Power: 100 W

Integrated automatic sample handling
Standard-curve analytical workflow
Conductivity-based measurement
Ultrasonic fixed-volume control
Automatic or manual waste discharge
Automatic cleaning system
Over-temperature and digestion-tube overflow alarms
Corrosion-resistant sample-transfer system