Semi-Automatic Kjeldahl Nitrogen Analyzer DKDN-15
*The KDN Kjeldahl nitrogen analyzer uses a microcomputer for process control, making the operation very simple and convenient.
*Automatic distillation control, automatic water addition, automatic water level control, automatic water stop.
*Various safety protections: digestive tract safety door device, steam generator water shortage alarm, water level detection fault alarm.
*The instrument casing is made of specially made spray coated steel plate, and the corrosion-resistant transparent safety protection door allows observation of the entire distillation process
Specification :
Water-in mode | tap water and distilled wateren |
Sample quantity | solid: 0.20g-2.00g |
Semisolid | 2.00g-5.00g |
Liquid | 10.00ml-25.00ml |
Measuring range | 0.1mgN-200mgN (mg nitrogen) |
Recovery rate | ≥99% (relative error, including digestive process) |
Distillation speed | 5-15 min/sample (according to sample amount) |
Cooling water consumption | 3L/min |
Repetition rate | relative standard deviation <±1% |
Rated power | AV 220V/50Hz, 1000W |
Water supply | water pressure >1.5MPa |
Water temperature | <20℃ |
Shape size | 380*320*670mm |
Weight | 20Kg |
Reliable, Operator-Guided Nitrogen and Protein Analysis: Semi-Automatic Kjeldahl Nitrogen Analyzer DKDN-15
Achieve accurate and cost-effective total nitrogen and protein testing with the Semi-Automatic Kjeldahl Nitrogen Analyzer DKDN-15—a smart, benchtop system designed for food, feed, agricultural, environmental, and educational laboratories. Compliant with AOAC, ISO 5983, EPA 351.2, and DIN 32747, the DKDN-15 automates the critical distillation and titration steps of the Kjeldahl method while allowing manual control over digestion—offering an ideal balance of precision, safety, and affordability for routine analysis.
Engineered for Accuracy, Safety, and Practical Workflow
The DKDN-15 Semi-Automatic Kjeldahl Analyzer features single- or dual-position distillation, precise automatic dosing of NaOH and boric acid, controlled steam generation, and integrated titration endpoint detection (manual or automatic titration options available). The user performs sample digestion separately (using a digestion block or hot plate), then loads the digested sample into the distillation unit for hands-free ammonia liberation and collection.
- Semi-Automatic Distillation & Titration – Automates reagent addition, steam distillation, and endpoint detection; manual digestion for flexibility.
- Compliant with AOAC, ISO 5983, EPA 351.2 – Validated for food, feed, soil, wastewater, and fertilizer analysis.
- High Recovery Rate: >99.5% – Ensures accurate protein and nitrogen quantification.
- Digital Control Panel with Timer & Alarms – Simple operation with visual/audible alerts for process completion or errors.
- Chemical-Resistant Construction – PTFE tubing, borosilicate glass, and corrosion-resistant components.
- Compact Benchtop Design – Fits in small labs; includes fume exhaust port for safe operation.
Trusted in Teaching, QC, and Field Labs
From measuring protein in grains and dairy to determining ammonium in soil or TKN in wastewater, the DKDN-15 delivers dependable results without the complexity or cost of fully automated systems. Its semi-automatic design is ideal for labs that value operator involvement, batch flexibility, and method transparency—while still ensuring safety and repeatability.
Whether you’re a university teaching Kjeldahl fundamentals or a feed mill verifying nutritional content, the Semi-Automatic Kjeldahl Nitrogen Analyzer DKDN-15 provides professional-grade performance at an accessible price.
Control your process. Trust your results. Simplify nitrogen analysis.
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