The KD780 Kjeldahl nitrogen analyzer is a highly precise instrument meticulously engineered to measure nitrogen (N) or protein content. This analyzer is particularly suitable for applications in food processing, grain analysis, animal feed evaluation, water quality assessment, soil examination, drug testing, animal husbandry, fertilizer analysis, environmental monitoring, medical research, agricultural practices, scientific inquiry, educational initiatives, and quality assurance processes.
This automatic device employs two methodologies: automatic titration and side distillation side titration, ensuring the accurate measurement of nitrogen content. With its notable degree of automation and efficiency, the analyzer serves as an indispensable tool for a wide array of analytical requirements.

- Fully automated titration system: Provides a fully automated titration process.
- High precision sensor: Ensures high accuracy of titration color determination.
- Intelligent anti-crystallization technology: Automatic prevention of alkali pump crystallization, improve maintenance efficiency.
- Modular structure: Easy to maintain and upgrade.
- Friendly user interface: Simplify operation process and improve user experience.
- Automated data management: Automatic recording and storage of experimental data.
- High durability design: Suitable for long-time continuous work.
MODEL | KD780 |
Determination Range | 0.1-250 mgN |
Measuring Speed | 3-5min /sample |
Titration Accuracy | RSD≤ 0.3% |
Sample Weight | Solid ≤ 20g, Liquid ≤ 20ml |
Reproducibility | 0.3% |
Rate of Recovery | ≥99.5% (1-220 mgN) |
Titration While Distillation | √ |
Interface | USB RS232 WIFI |
Compatibility | Ammonium Nitrogen High Nitrogen Nitrate Nitrogen |
Nitrogen Pipe Emptying | Automatic |
Automatic Titration | AOAC Standard |
Storage Capacity | Data Storage > 9000 sets Solution Storage > 10,000 sets |
1. **Complimentary Sample Testing**: Clients are encouraged to submit samples for testing at no cost.
2. **Technical Consulting Services**: We provide diverse experimental technical consulting to ensure clients receive professional guidance.
3. **Consultation for Testing Products**: We additionally offer complimentary technical consulting support for various testing products within our industry.
Our commitment lies in delivering comprehensive services and support to fulfill all client needs effectively.




Alva Instruments is ISO9001 certified, CE marked, and TUV approved, boasting an array of invention and utility patents. As a strategic partner to the Chinese Academy of Sciences, Alva plays a role in setting national standards across various industries, including the feed sector.










- Professional Consultation: Always standby to answer your questions and offer solutions.
- Quick Quotation: Respond promptly with detailed quotation breakdown.
- Order Confirmation: Work with you to finalize price, quantity, shipment, delivery time and payment terms.
- Convenient Ordering: Facilitate you to place orders easily and complete the Proforma Invoice (PI) stamping process.
- Strong Capability: Possess robust scientific research strength to drive innovation.
- Patent Endorsement: Hold multiple patented technologies, showing unique advantages.
- Institute Collaboration: Cooperate with scientific research institutions for a long term, keeping up with the forefront.
- Joint Establishment: Collaborate with Alva - China Southern Joint Laboratory for in-depth expansion.
- Customer Interaction: Establish cooperation with numerous customers to accurately understand demands.
Q: What products does Jinan Alva Instrument Company mainly provide?
A: Jinan Alva Instrument Company mainly produces Soxhlet fat analyzer, filter bag fat analyzer, Kjeldahl nitrogen analyzer, fiber analyzer, digestion analyzer, solid-liquid extraction analyzer, distillation analyzer, liquid-liquid extraction analyzer, and other high-end analysis and measurement instruments, and provides industry application solutions and after-sales service.
Q: What are the features of your products?
A: Our products have the most complete and cutting-edge technology in the industry. For example, the automatic Kjeldahl nitrogen analyzer is widely used to determine nitrogen or protein content, the automatic hydrolyzed fat analyzer is suitable for determining total fat and fatty acid, and the automatic digestion instrument is suitable for the automatic wet digestion of various samples.
Q: What quality assurance do you have for your products?
A: We offer a one-year warranty on all our products. If there is a quality problem or non-human damage to our products within one year, we will be responsible for repair or replacement.
Q: What services do you offer if you need technical support?
A: Our company is a research and development, production, and sales in one with their complete technology of industry and trade enterprise, we have a special technical after-sales service team professional to solve all kinds of technical problems for customers, instrument operation methods, reagent preparation methods, for different experimental para analyzer adjustment solutions, after-sales maintenance, we provide technical support. We can provide technical data, video guidance, and accessories support according to customer needs.
Q: What are your products suitable for?
A: Our products are suitable for food processing, grain, feed, water, soil, pharmaceutical, tobacco, animal husbandry, soil fertilizer, environmental monitoring, medicine, agriculture, scientific research, teaching, quality supervision, and other fields.
Q: Do you offer customized products and services?
A: Yes, we accept customized services. We are an industry and trade-integrated enterprise with a sound technical team and more than ten years of experience in the laboratory analytical instrument industry. We deeply understand the actual use of various types of machines and customer needs, so our strength is enough to support our customized products and services.
Q: How does your product operate?
A: Our products are equipped with user manuals, operation videos, and other materials and shipped together with the products. At the same time, our instruments are equipped with experimental programs set before the factory. These programs are formed after long-term practical experience accumulation and continuous improvement, which can meet the needs of most experiments. Customers can basically realize one-click start experiments without additional complicated operations. If you encounter any problems during use, you can contact our technical support team at any time, we will provide you with professional guidance and help.
Q: Do you offer opportunities for international cooperation and exchange?
A: Yes, we have long-term strategic cooperation with Nanjing University of Aeronautics and Astronautics and other universities, participate in the development of the national 863 research program, and cooperate with world-class R&D teams to provide opportunities for international cooperation and exchange.