The OR-KNA 100: Routine Nitrogen Analysis at Industrial Scale

OR-KNA 100 fully-automatic Kjeldahl nitrogen analyzer

The OR-KNA 100 fully-automatic Kjeldahl nitrogen analyzer is positioned squarely at the intersection of analytical chemistry and operational efficiency. It replaces manual acid, alkali, and dilution steps with microcomputer-controlled automation, handling distillation and titration simultaneously. For labs processing dozens of samples daily, this concurrency directly cuts per-run time.

Specifications reveal an instrument built for consistency and recovery. The manufacturer claims repeatability below 0.5% RSD and a recovery rate over 99.5%, both critical for regulatory compliance in food safety and agricultural testing. Its triple-color endpoint detection — using red, green, and blue sensors — offers a pragmatic alternative to traditional pH electrodes, which require frequent calibration.

Safety redundancies are notable. The distillation flask benefits from dual liquid-level control and automatic heating cutoffs, while the system monitors cooling water flow and pressure in real time. These features reduce the risk of dry burning or ammonia escape, common failure points in less robust designs.

From a procurement perspective, the use of ABS engineering plastics and corrosion-resistant piping with a three-year warranty signals an attempt to lower total cost of ownership. The memory capacity of 10,000 data groups and optional USB or wireless data transmission align with audit trail requirements such as 21 CFR Part 11.

China’s role here is as a producer of reliable, mid-tier analytical instruments that compete on integration and after-sales support rather than raw novelty. The adjustable distillation power and programmable staged alkali addition suggest the system is engineered for diverse sample matrices — from grain to wastewater — without requiring specialized training.

Why it matters:
For labs standardizing around automated Kjeldahl, the OR-KNA 100 reduces operator dependency and documentation overhead. Its real strength lies in packaging safety, compliance, and throughput into a single benchtop unit — making it a practical choice for China’s expanding network of third-party testing centers.

View Product →