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DKL 8 Automatic Digestion Unit

Automatic Kjeldahl Digestion Units with 8 positions aluminum heating block that offers excellent thermal stability and homogeneity. 
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DKL 8S30100200
DKL 8S30110200
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Walk-away digestion unit to maximize productivity

Walk-away digestion unit to maximize productivity

DKL digesters are fully automatic and immediately ready to use, as they consist of an aluminum heating block, a lift for automatic sample handling, suction hood, test tubes, test tube rack and drip tray.

The DKL series provides the operator with the ultimate technology that allows the laboratory technician to set up the analysis choosing from a library of 54 programs (30 pre-installed + 24 customizable), press START and walk away, boosting the lab productivity.

Ease of loading and unloading make the VELP DKL a pleasure to use when carrying out Kjeldahl analysis, and there is no need to handle the sample when the tubes are hot!
 

Premium performance with aluminum heating block

Premium performance with aluminum heating block

DKL extremely fast aluminum heating block is capable of reaching 420°C in just 20 min with best-in-class temperature stability.

The choice of premium materials and the powerful microprocessor guarantee precise block temperature with an accuracy of ± 0.5°C.

Even in terms of repeatability and conductivity, aluminum offers incredibly high performance!

DKL digesters drastically reduce the time needed to reach the digestion temperature according to the Kjeldahl method. 

Compact design to save space in your lab

Compact design to save space in your lab

Everybody knows that there is never enough bench space in a laboratory, this is why we have made the DKL series as compact as possible.

The narrow footprint enables you to optimize bench space according to need: fit more instruments on the same lab bench or make different use of the extra space available.

Many labs prefer to perform mineralizations under a fume hood and the compact design of the DKL ensures a minimum use of precious space. 

Intuitive operations

Intuitive operations

Enjoy the simplicity of the DKL’s display. Extremely bright, easy to read and practical with all the fundamental parameters available at a single glance.

Current temperature and ramp settings are clearly viewed on the display.  Save up to 54 programs (30 pre-installed, 24 customizable) with up to 4 temperature ramps. 

Monitor each stage of analysis as well as select options such as language (including ideograms).

Improved communication leads to improved efficiency.

Fume Neutralization System

Fume Neutralization System
For applications where the digestion process produces fumes, acid gases or corrosive substances, the below specific accessory is strongly recommended:
  • KS 1000 Scrubber neutralizes all the fumes

TEMS™ Technology

TEMS™ Technology
The DKL series uses the unique TEMS™ technology, which provides significant savings.


Time: fast heating to 420 °C in just 22 minutes, excellent reliability, homogeneity and temperature accuracy.

Energy: reduced consumption by 35%, reduced CO2 emissions by reducing pollution.

Money: significant cost reduction for each analysis, increases the number of analyses without additional costs.

Space: compact profile, minimum use on the bench for optimal laboratory management

Models

Please select the model:
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Genuine consumables for your digestions

Genuine consumables for your digestions
Choosing the right consumables allow the optimization of analytical operations to achieve the highest possible performance of your Digestion Unit. We strongly recommend the use of VELP original consumables in order to be sure to obtain the best performance form your VELP instrument. 

The addition of a suitable catalyst, along with high temperature, have influence on the speed and the efficiency of the mineralization in Kjeldahl analysis. Achieving the highest level of performance in a wide range of Kjeldahl applications is now possible with VELP genuine KjTabs™ catalyst and antifoaming tablets.

VELP Nitrogen Free Weighing Boats are the perfect solution to all the difficult transfer operations of powders or syrupy samples into mineralization test tubes.
Velp.com
Adapter for probe Ø3mm for DK/DKL/ECO
cod. A00000362
Velp.com
Glass cap
cod. A00000243
Velp.com
IQ/OQ DKL Manual
cod. A00000186
Velp.com
KjTabs VCM - 1000 pcs/box
cod. A00000274
Velp.com
KjTabs VCT - 1000 pcs/box
cod. A00000276
Velp.com
KjTabs VKPC - 1000 pcs/box
cod. A00000275
Velp.com
KjTabs VS Antifoam - 1000 pcs/box
cod. A00000283
Velp.com
KjTabs VST - 1000 pcs/box
cod. A00000277
Velp.com
KjTabs VTCT - 1000 pcs/box
cod. A00000281
Velp.com
KjTabs VW - 1000 pcs/box
cod. A00000282
Velp.com
Mineralization Rod, pack. 10 pcs
cod. A00000431
Velp.com
Sample rack DK8-DKL8 test tubes 400ml
cod. A00000403
Velp.com
Sample rack for DK-DKL8
cod. A00000173
Velp.com
Stand for DK-DKL8-DK18/26
cod. A00000184
Velp.com
Suction cap and drip tray for DK-DKL8
cod. A00000175
Velp.com
Test tube Ø50x300 mm, 400 ml
cod. A00000185
Velp.com
Test tubes Ø42x300 mm, 250 ml 3pcs/box
cod. A00000144
Velp.com
USB Cable 1,8 mt with filter
cod. 40002309
Velp.com
Weighing boats 58x10x10 mm, 100 pcs/box
cod. CM0486000
Velp.com
Weighing boats 70x23x15 mm, 100 pcs/box
cod. CM0486001

TECHNICAL DATA

 
Construction material: Stainless steel with chemical resistant coating
Lift and suction cap control Automatic
Control system Microprocessor with LCD graphic display
Temperature range: Ambient to 450 °C / 842 °F
Stability of the heating block temperature: ± 0,5 °C
Precision of the heating block temperature: ± 0,5 °C
Set temperature: Digital readout in °C or °F
Temperature Calibration: Automatic
Program library 54 Program library, including 24 user-programmable memories
Selectable ramps: up to 4 per program
Digestion time range: 1 to 999 minutes
Time selection: 1-minute steps
Countdown: Digital readout
Selectable language: UK, I, E, F, RUS, CN + Additional downloadable
Interface USB to update SW
Heating Places 8-position
Size of tubes 250 ml test tubes (Ø 42 mm)
Power: 1150 W
Dimensions (WxHxD): 210x690x540 mm (8.3x27.2x21.3 in)
Weight: 19.7 kg (43.5 lb)

SAFETY

Overtemperature Thermostat
Damaged temperature probe Automatic detection and alarm message
Lift movement Visual/acustic signal
Hot surface Visual signal if T>50°C

Brochures & Leaflets

VELP Scientifica invites you to download brochures and leaflets in order to explore our premium quality solutions and to have all the major key arguments, features and specifications of a product in your hands, in any place, and at any time.
DKL Series Automatic Kjeldahl Digestion Units - Brochure [EN]
Learn more about our fully automatic Kjeldahl digestion units that incorporate the revolutionary TEMS™ technology for unprecedented savings.
Analytical Instruments - Line Brochure [EN]
VELP Scientifica invites you to download line brochure to explore our premium quality solutions.
Product Portfolio - Brochure [EN]
VELP Scientifica invites you to download product portfolio brochure to explore our premium quality solutions.
Valuable Information On Kjeldahl Method
Learn more about the Kjeldahl principle, first described by Johan Kjeldahl over a century ago (1883).

Comparison tables

Select the category of products you are interested in and this tool will give you an easy overview of what is available at VELP in order to find the product that is perfect for you. These comparison tables provide a brief description with side by side features from basic equipment to the most advanced analytical solutions.
VELP Test Tubes Comparison Table
An overview of test tubes available at VELP to find the perfect product for your applications.
 

Application notes

Choose among a comprehensive library of Application Notes / White Papers and learn more on how to optimize the performance of your VELP instruments. These documents offer typical analyses of well-known samples, together with official references and suggestions, to make you an expert!
E-book - Barley and Feed: N/Protein Determination and Fiber Determination
Discover more about the nutritional properties of barley and how to determine n/protein and fiber to optimize livestock operations. Download the e-book with results on BIPEA proficiency testing sample.
E-book - Kjeldahl and Dumas Method Comparison: N/Protein Determination in Feed
Discover more about the Kjeldahl and Dumas methods for the determination of n/protein in various feed samples, a key parameter concerning quality control and protein declaration. Download the e-book with results on BIPEA proficiency testing samples and a comprehensive comparison of the two techniques.
Casein Determination in Milk - Kjeldahl method
Casein proteins are a family of proteins involved in the production of cheese and fermented milk. They are also extremely important nitrogen compounds in the dairy products production, additives in medicine, and have a technical use in cosmetics, paints and adhesives.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.
Guidelines for choosing the correct Velp Kjtabs in Kjeldahl Analysis
The digestion phase is the most time-consuming step of the Kjeldahl analysis. Speeding up the process and ensuring a proper outcome is of fundamental importance when it comes to efficiency in the laboratory.
VELP designed seven different types of accurately pre-dosed KjTabs™ tablets to speed up the mineralization process. Along with catalysts, VELP produces antifoaming KjTabs™ to reduce foam formation during the initial phase of the mineralization process.
N/Protein Determination in Barley - Dumas vs Kjeldahl Method
Protein content of malting barley is important because it affects malting, brewing, and their end products. Discover more on the results obtained with Kjeldahl and Dumas Method
N/Protein Determination in Cereals - Kjeldahl method
Cereals contain between 8-15% of different kinds of proteins such as albumins, globulins, prolamines, gliadins, glutelins and glutenins. Their chemical composition is important not only for nutritional purposes, but also for the bread dough and its process of baking and for economical reason. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and AACC.
N/Protein Determination in Cheese - Kjeldahl method
Due to the greater demand and consumption of dairy products, protein analysis has become more and more important to ensure food safety, food quality and fairness in international trade. Learn how to obtain excellent performance with DK / DKL and UDK Series, and how to work in accordance with ISO and AOAC.
N/Protein Determination in Feed - Kjeldahl method
Protein is a critical nutrient in cattle, pigs, poultry, sheep, horses and pet food diets. It is required for milk production and reproductive tract reconditioning after calving.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC.
N/Protein Determination in Fishmeal - Dumas and Kjeldahl method comparison
Fishmeal is an important food used in animal husbandry and in aquaculture. It is also the main ingredient of the commonly marketed feed for aquarium fish. Discover more on the results obtained with the Kjeldahl and the Dumas Method for the determination of protein content in fishmeal.
N/Protein Determination in Liquid Fertilizers - Dumas vs Kjeldahl Method
A fertilizer is any type of organic or inorganic substance that contains nutrients, macroelements or microelements, in forms assailable by plants, to maintain or increase the content of these elements in the soil, improve the quality of the substrate at the nutritional level, stimulate the vegetative growth of the plants, etc.
N/Protein Determination in Meat - Kjeldahl method
Meat proteins have an high nutritional value and they also affect the quality of the finished product,influencing some properties as well as water retention, emulsifying capability and the softness of the dough. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC.
N/Protein Determination in Milk - Kjeldahl method
The protein fraction includes caseins (80%) and whey proteins (20%) and it is of interest, not only from the nutritional point of view, but also from a technological one. Milk proteins have particular chemical properties which contribute to create typical sensory features, influencing the whole food processing. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.
N/Protein Determination in Milk Powder - Kjeldahl method
Milk powders contain all twenty-one standard amino acids, the building blocks of proteins, and are high in soluble vitamins and minerals. Compared to liquid milk, this product has a far longer shelf life and does not need to be refrigerated, due to its low moisture content.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.
N/Protein Determination in Nuts - Dumas/Combustion method
Nuts are an excellent source of protein and healthy fats,  the amounts vary depending on the type of nut. Discover how to determine the N quantity in Nuts with Dumas Combustion method.
N/Protein Determination in Probiotic Drinks - Kjeldahl method
A probiotic is a live microbial food ingredient that beneficially affects the host through its effects in the intestinal tract. They are widely used to prepare fermented dairy products.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.
N/Protein Determination in Rapeseed - Dumas vs Kjeldahl Method
Rapeseed meal, called canola meal in North America, Australia and some other countries, is a high protein-containing material that can be used as a feed for livestock and poultry. Typical meal contains a little less than 40% of protein; however it also contains about 12% of crude fiber.
N/Protein Determination in Soybean - Kjeldahl method
Soybean meal is the most important protein source used to feed farm animals. It represents two-thirds of the total world output of protein feedstuffs. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC.
Nitrogen and Protein Determination in Commercial Whole Liquid Milk - Dumas vs Kjeldahl Method
Milk, consumed in many forms, has always been a part of the human diet. Due to the greater demand and consumption of dairy products, protein analysis has become increasingly important to ensure food safety, quality, and fairness in international trade. Learn about the comparison between Dumas and Kjeldahl methods in Nitrogen and protein determination.
Nitrogen and Protein Determination in Insect Flour: Kjeldahl and Dumas comparison
The trend of using edible insects to produce food is growing. Thus, the food industry needs to find analytical methods and instruments to assess their potential. Discover how to determine N/Protein content according to the Kjeldahl and Dumas methods.
Nitrogen Determination in Engine Oil - Kjeldahl method
The nitrogen content in lubricating oils must be low to prevent deposits and reduce the risk of damage: for this reason, nitrogen is considered as one of the quality control parameters of crude oil, lubricants and fuel oils. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with ASTM.
TKN Determination in Water and Wastewater
Nitrogen-containing compounds act as nutrients in streams, rivers, and reservoirs. The major routes of entry of nitrogen into bodies of water are municipal and industrial wastewater, septic tanks, feedlot discharges, animal waste runoff from fertilized agricultural fields and lawns and discharges from car exhausts. Bacteria in water quickly convert nitrites to nitrates and this process uses up oxygen. High nitrates in drinking water can cause digestive disturbances in people.
Total Dietary Fiber in Corn Flakes
Dietary fiber is not digested from human stomach and it represent a crucial nutrient in human diet for its ability to enhance satiety, to regulate intestinal functions and to modulate the nutrients absorption. Learn how to obtain excellent performance with GDE, CSF6 and Micro-Kjeldahl apparatus and how to work in accordance with AOAC 985.29.
Total Nitrogen determination in Urea – Dumas vs Kjeldahl Method
Urea is a crystalline substance widely used as a fertilizer, feed supplement, and starting material for plastics and drugs. It has a very high nitrogen content; it is readily converted to nitrate in the soil and is therefore considered one of the most concentrated nitrogenous fertilizers. The importance of having a controlled Nitrogen content in this product is crucial to always keep the same production standards.
Whey Protein Determination in Milk
In order to determine soluble whey proteins (WP), it is necessary to know the amount of milk total nitrogen (Ntot), non-casein nitrogen (NCN) and non-proteins nitrogen substances (NPN).
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

Certifications

Our compliance to statutory rules and regulations worldwide.
With the CE mark, VELP Scientifica declares that the products are designed and manufactured in compliance with the essential safety requirements of the European Directive on Safety.
The Certification Body (CB) Certificate is an international program created by the IECEE for the acceptance of product safety test results among participating laboratories and certification organizations around the world.
The cNEMKOus mark ensures this product is designed and manufactured in compliance with the International Directive on Safety IEC/EN 61010-1. The cNEMKOus mark has the same legal status as any other NRTL/SCC accredited marks, for U.S. and Canada.
CE Declaration of Conformity VELP Scientifica Automatic Digestion Units
With the CE mark, VELP Scientifica declares that the products are designed and manufactured in compliance with the essential safety requirements of the European Directive on Safety, matching EU consumer safety, health or environmental requirements.
CB Certificate VELP Scientifica DKL Kjeldahl Digestion Units
The Certification Body (CB) Certificate is an international program created by the IECEE for the acceptance of product safety test results among participating laboratories and certification organizations around the world.
cNEMKOus VELP Scientifica DKL Kjeldahl Digestion Units
The cNEMKOus mark ensures this product is designed and manufactured in compliance with the International Directive on Safety IEC/EN 61010-1
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FAQ
Check technical sheets with answers to most frequently asked questions
What do we have to add to the test tube to perform the digestion step?
To properly perform the digestion step, it is necessary to prepare the glass test tube with the sample and:

1. KjTabs™ catalyst tablets to accelerate the digestion
2. Antifoam tables (especially recommended in the case of samples with a high-fat content)
3. 12 - 15 ml of concentrated sulfuric acid (98%)
How to insert the sample into the test tube?
The sample must be weighed within Nitrogen free weighing boats (CM0486000) and then placed inside the test tubes. In so doing there is no risk of part of the sample sticking to the test tube parts and the digestion therefore not being performed correctly.
Which kind of test tubes does VELP supply?
VELP provides a full set of test tubes. Download here the comparison table!
VELP Scientifica Srl
Via Stazione, 16
20865 Usmate (MB) - Italy
Tel. + 39 039 628811
VELP Scientific, Inc
40, Burt Drive, Unit #1, Deer Park
NY 11729 - U.S.
Tel. +1 631 573 6002
VELP China Co. Ltd.
Room 828, Building 1, No.778 Jinji Road
Pudong New Area, Shanghai, China
Tel. 400-089-8029

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