KDN-04D蛋白质测定仪是一款基于凯氏定氮法原理设计的检测设备，广泛应用于食品加工、农产品检验、饲料生产、科研实验等领域。该仪器由消化器和蒸馏器两大部分组成，消化部分采用井式电加热装置，使样品在消化管内能够快速且高效地完成消化过程。其测定范围为含氮量0.05%-90%，精度高，相对差≤2%，平行差≤0.2%，测定时间短，消化约45分钟，蒸馏约6分钟。此外，该仪器配备7英寸彩色触摸屏，操作界面直观，数据管理系统完善，用户可轻松完成参数设置、流程监控及结果查询。

The KDN-04D Protein Determination Instrument is a detection device designed based on the Kjeldahl nitrogen determination method. It is widely used in food processing, agricultural product inspection, feed production, scientific research experiments, and other fields. The instrument consists of two main parts: a digester and a distiller. The digester uses a well-type electric heating device, enabling the samples in the digestion tube to be digested quickly and efficiently. With a nitrogen content measurement range of 0.05%-90%, the instrument boasts high precision, with a relative difference of ≤2% and a parallel difference of ≤0.2%. The digestion process takes about 45 minutes, and distillation takes about 6 minutes. Moreover, the instrument is equipped with a 7-inch color touch screen. The operation interface is intuitive, and the data management system is comprehensive, allowing users to easily complete parameter settings, process monitoring, and result queries.