NK9870B Fully Automatic Kjeldahl Analyzer

The Kjeldahl method is a classic technique for determining nitrogen.

It is widely used for the measurement of nitrogen in soil, food, livestock, agricultural products, feed, and other nitrogen containing compounds. The process for sample analysis using this method involves three main steps: sample digestion, distillation and separation, and titration analysis.

Our company is one of the creators of the national standard GB/T 33862-2017 for Fully (Semi) Automated Kjeldahl Nitrogen Analyzer. Therefore, the Kjeldahl analyzer series products we develop and manufacture comply with both the GB standard and relevant international standards.

One-key automatic completion:

Reagent addition, temperature control, cooling water control, sample distillation separation, sample titration analysis, data storage display, emptying of digestion tube waste, emptying of waste liquid, rinsing of the titration cup, and completion prompt

Based on the Windows11 developed computer operating system:

Real-time computer control of host analysis and operation

Storage, reading, query, export, and internet transmission of analytical data

Automatic generation of analysis reports, editing, printing, exporting, and other network services

Standard conffguration of 23-inch desktop computer

Control system with a 10-inch color touch screen for "nitrogen determinator host, refrigeration system" uniffed control, no need for multiple switch settings. Convenient, simple, and safe

Three-level permission management, electronic records, electronic tags, operation traceability inquiry system in line with relevant certiffcation requirements

★ Patented technology "Electronic refrigeration circulation system" does not require tap water fully automatic Kjeldahl nitrogen determinator, energy-saving, environmentally friendly, high condensing efffciency

System automatically shuts off after 60 minutes of inactivity, energy saving, safe, and worry-free

★ The instrument is equipped with a protein coefffcient lookup table for users to peruse, query, and participate in system calculations.

When the coefffcient = 1, the analysis result is "nitrogen content"; when the coefffcient > 1, the analysis result automatically converts to "protein content" for display, storage, printing

★ Patented technology adjusts R, G, and B light intensity automatically, suitable for analyzing different sample concentrations.

The titration system uses R, G, and B coaxial light sources and sensors with a wide color adaptation range and high precision.

TTe titration speed can be set from 0.05ml/sec to 1.0ml/sec, with the minimum titration volume of 0.2ul/stepp

German ILS 10mL (optional 25mL) injection syringe and 0.6mm pitch linear motor make up the high-precision titration system

★ The internal standard of the titrant concentration eliminates the systematic errors that differ between human and instrument determinations, and is highly accurate and convenient 

The titration cup is installed in a visible manner for the user to observe the titration process and the cleaning of the titration cup

The simultaneous distillation and titration mode can save analysis time and reduce ineffective distillation electricity consumption

The distillation time is freely set from 10 seconds to 9990 seconds

The steam ffow is adjustable from 1% to 100% to suit different concentration samples

Automatic waste discharge of the digestion tube reduces the workload of the staff

★ Automatic cleaning of the alkali line when shut down to prevent line blockage and ensure the accuracy of the liquid supply

Data storage (16M) can reach 1 million records for user review

5.7CM automatic paper cutting thermal printer

USB, LAN, RS232, CAN, WIFI, Ethernet, electronic balance, cooling system data interface

★ The splash bottle is made of "high molecular PP plastic" processing, which can meet the application requirements of high temperature, strong alkali, and strong acid working conditions

★ The steam system is made of 304 stainless steel, and the liquid level control adopts patented technology "separate capacitive liquid level sensor control", and the system is overall safe, reliable, and has a long service life

★ The condenser is made of 304 stainless steel, and the cooling speed is fast, and the analysis data is stable

The leakage protection system ensures the safety of the operatorr TTe safety door and safety door alarm system ensure the safety of personnel

The digestion tube missing protection system prevents reagent and steam from hurting people

Steam system low water alarm prompt, shutdown prevents accidentss Steam pot overheating alarm, shutdown prevents accidents

Steam overpressure alarm, shutdown, prevents accidents

Sample overheating alarm, shutdown prevents the sample temperature rise from affecting the analysis data

Low liquid level alarm for reagent bucket and titration bottle

Monitoring of cooling water flow prevents insufffcient water flow from causing sample loss and affecting analysis results