DW-ATN-300 Automatic Azotometer

Our company’s DW-ATN-300 automatic azotometer(protein determinator) is designed in accordance with the Kjeldahl method, mainly for assaying the content of ammonia nitrogen, protein nitrogen in cereals, food, dairy products, beverages, feed, soil, water, medicine, sediment and chemicals. The determination conforms to national standards, AOAC, ISO, etc.

  • 20 Stored Programs
  • Manual / Automatic Modes
  • ≥99.5% Recovery
  • 3–7 min/sample
  • 0.1–240 mg N
ATN-300 Brochure

Features

  1. For solution setting, volume of boric acid solution, the amount of alkali and distillation time can be set up at random
  2. 20 groups of experimental procedures can be stored to meet user’s various requirements
  3. Perfect protection system: remind when digestion tube is not in place, protect steamer furnace from being overheated or over-voltage; alarm when distillation is finished
  4. Manual and auto, two modes for customer to shift

Differences between different models of Kjeldahl Analyzers

The DW-ATN-100 is Manual, While The DW-ATN-300 is Automatic;

Neither the DW-ATN-100 nor the DW-ATN-300 Includes a Titration Device; The User Can Perform The Titration Process Manually;

Both the DW-ATN-100 And DW-ATN-300 Require An Optional Pretreatment Digestion Furnace;

Applications of DW-ATN-300 Automatic Azotometer

Food and Agricultural Products Industry: Safeguarding Safety and Quality

Protein content testing; Adulteration identification and safety supervision; Nutritional assessment of agricultural products;

Food and Agricultural Products Industry1
Food and Agricultural Products Industry2 1 scaled

Feed and Pet Food Industry: Precise Nutritional Formulation

Raw material quality control; Formula optimization and cost control;

Feed and Pet Food Industry1
Feed and Pet Food Industry2 1

Pharmaceutical and Biotechnology Fields: From R&D to Clinical Trials

Drug quality control; Biological product analysis;

Pharmaceutical and Biotechnology Fields1 1
Pharmaceutical and Biotechnology Fields2

Environmental Science and Soil Research: Protecting Ecological Balance

Water pollution monitoring; Soil fertility evaluation; Solid waste treatment and resource utilization;

Environmental Science and Soil Research2 1
Environmental Science and Soil Research1

Agricultural Research and Education: Combining Theory and Practice

Crop nutrition research; Teaching experiments and talent cultivation;

Agricultural Research and Education1 1
Agricultural Research and Education2

Other Fields: Diverse Application Scenarios

Chemical and Materials Science; Cosmetics and Daily Chemical Industry;

Other Fields1 1
Other Fields2

DW-ATN-300 Automatic Azotometer Display

ATN-300-A

Troubleshooting and Solutions

Main causes: Deteriorated titrant, contaminated or aged electrodes, high salt content in digested samples, unstable steam flow during distillation, inconsistent concentration of boric acid absorption solution.

Solutions: Replace boric acid absorption solution and standard acid titrant regularly, clean titration electrodes after each test, and calibrate steam pressure.

Common causes: Incomplete digestion, ammonia escape during distillation, air leakage of condenser tubes, insufficient alkali addition, excessive sample weight leading to carbonization and agglomeration.

Improvement measures: Extend high-temperature digestion duration, add sufficient strong alkali to release ammonia, check pipeline tightness, and control sample weighing amount.

Fault sources: Insufficient water supply, limescale buildup on the heater, blocked steam pipelines, faulty water level sensor, damaged heating module.

Troubleshooting: Clean limescale on the furnace, inspect water inlet valve and water tank level, unclog pipelines, and repair heating components.

Main factors: Insufficient automatic cleaning duration, incomplete waste liquid discharge, protein precipitates attached to the inner wall of condenser and reaction tubes.

Standard operations: Set an extended automatic cleaning procedure, rinse repeatedly with ultrapure water, and soak disassembled glassware in acid regularly.

Key issues: Leaky burette, titrant stored without light protection, drastic ambient temperature fluctuation, boric acid absorbing carbon dioxide from air.Solutions: Replace sealed titration pipelines, store titrant away from light and refrigerated, prepare boric acid solution freshly before tests, and operate under constant ambient temperature.

FAQ

It provides touch-button control for distilled water addition, alkali addition, and steam/distillation operation, reducing direct reagent handling.

Yes. It can be used as part of the Kjeldahl workflow for determining nitrogen and calculating protein content according to the applicable method.

It is suitable for Kjeldahl nitrogen analysis of samples such as food, feed, agricultural products, soil, and other laboratory samples after appropriate digestion.

Yes. The housing uses a powder-coated steel construction designed to resist chemical reagents and routine laboratory wear.

Its simplified internal layout is designed for easier installation, routine inspection, and maintenance.

Technical Parameters

MaterialsCereals, food, dairy products, beverages, feed, soil, water, medicine, sediment and chemicals
Range0.1mgN ~240mgN（nitrogen content 0.02% ~95%)
Sample quantitysolid ≤5g/unit, liquid ≤15ml/unit
Recovery≥99.5%
Repeatability≤ ±1%
Distillation rate3~ 7 min/sample
Cooling water consumption1L~2L/min
Power220V 50Hz
Power rating1600W
External dimension775×380×330mm
Weight28kg

Optional digestion furnace for DW-ATN-300 automatic azotometer

DW-KDN-D series digital-display temperature-controllable digestion furnace have models of 4 holes, 8 holes, 12 holes and 20 holes for user to choose, depending on their detection amount. SO2 and other poisonous gas escaping from digestion furnace will be discharged by relevant waste gas absorption system, guaranteeing the safety and cleanness of your lab.

NameModelSpecification
Digital-display temperature-controllable digestion furnaceDW-KDN-04D4 samples/batch
DW-KDN-08D8 samples/batch
DW-KDN-12D12 samples/batch
DW-KDN-20D20 samples/batch

Why Choose Us?

One-Station Shopping

“Multiple suppliers” have always been an issue in the procurement process. Drawell as a one-stop laboratory equipment and scientific instruments supplier, can perfectly solve this problem. In addition to manufacturing our own equipment, we also represent other laboratory equipment. Our product lines are rich and diverse at competitive prices. Provide one-stop service to customers.

Customer-centric Services

User Training – Training by Drawell skilled engineers about installation, debug tests, technical services, etc. It can happen in our factory in China, or at the site in the customers’ country. Cost depends on where and when the training happens.

Online Support

To discuss the problem and get it resolved, online chats, real-time video calls, and remote guidance. For the after-sales stage, our online technical guidance is free and ready forever.

100% Quality Guarantee Policy

1 year free official warranty, including repairing quality-damaged parts, and offering replacements of selected parts (shipping cost is extra). 5% of the product price is charged for extending the warranty before the end of the official warranty.

Customer Service of DW-ATN-300 Automatic Azotometer

DW ATN 300 Automatic Azotometer

Other Kjeldahl Nitrogen Analyzer