Velp UDK169 Distillation Unit

A fully automatic Kjeldahl distillation with integrated colorimetric titrator and suitable for connection to the Velp autokjel autosampler, for high sample throughput, maximum flexibility and unattended operation.

A fully automatic Kjeldahl distillation with integrated colorimetric titrator and suitable for connection to the Velp autokjel autosampler, for high sample throughput, maximum flexibility and unattended operation.

UDK 169 combined with the autosampler provides high capacity distillation and analysis.

Automated Operation

  • Continuous process for 24 x 250 ml or 21 x 400 ml samples
  • Programmable boric acid, water, sodium hydroxide addition
  • Not necessary to set distillation time when titrating
  • Incorporates an AOAC recommended colorimetric titrator
  • Selectable steam generation output level 10% – 100%
  • Auto removal of residues from titrator & sample tube

High Tech

  • Connection to autosampler for unattended operation
  • 6 inch color touch screen
  • Library of 55 programs (31 pre-defined, 24 customizable)
  • Choice of 6 languages – from a wide range downloadable
  • Balance, mouse & printer connections
  • No loss of nitrogen: distillate temperature stays below threshold
  • Accurate dosing of reagents with high precision pumps

Versatile Data Handling

  • Multiple data interfaces: Ethernet, USB and RS 232C
  • On-board archiving of data including from balance
  • Data exporting to pen drive or PC in .xls format
  • Data manipulation software can be user preferred

Outstanding Reliability

  • Maintenance-free, resistant, patented steam generator
  • Patented titanium condenser for unmatched performance
  • Durable technopolymer splash head
  • Chemically-resistant technopolymer housing

Operator Safety

  • Lever operation simplifies tube insertion / removal (all sizes)
  • Protection screen for distillation chamber
  • Drip tray collects splashes
  • Zero pressure steam generator

Ecology & Standards

  • Performs to AOAC, EPA, DIN and ISO standards
  • Incorporates TEMS™ technology* Automated water supply control reduces consumption
Structure: Corrosion-resistant technopolymer
Display: 6" color touch screen
Time related to start for Devarda alloy analysis: 0 – 99 min
Protocol library: 55 methods: 31 pre-installed + 24 customizable
Reproducibility (RSD): ≤ 1 %
Recovery: ≥ 99.5 % at nitrogen levels between 1 and 200 mg N
Detection limit: ≥ 0.1 mg N
Power: 2200 W
Weight: 31 kg / 68.3 lb
Dimensions (WxHxD): 385x780x416 mm (15.2x30.7x16.4 in)
Analysis time: from 4 minutes (including titration)
Sodium hydroxide addition: automatic
Water addition: automatic
Boric acid addition: automatic
Sodium hydroxide volume: 0 - 150 ml
Water volume: 0 - 200 ml
Boric acid volume: 0 - 100 ml
Distillation and titration residues removal: automatic
Steam flow regulation: from 10 to 100 %
Tap water consumption: from 0,5 l/min at 15 °C – from 1 l/min at 30 °C
Connections: Ethernet, 2 x USB and RS232 for PC, printer, mouse, pen drive, balance
On-board archive for data storage
UDK 169 & AutoKjel
Autosampler capacity: 24-pos. carousel, 250 ml test tubes (included with AutoKjel) 21-pos. carousel, 400 ml test tubes (optional)
Power: 2250 W
Weight: 131 kg (288.8 lb)
Dimensions (WxHxD): 830x1730x640 mm (32.7x68.1x25.2 in)
Tanks included


A00001080   10001106   10000247   10004936   40001797  
A00001080Test tube ø 42x300 mm
10001106Collecting flask 250 ml
10000247Pincer for test tubes
10004936Touch pen
40001797Protective film for touch screen


A00001083   A00001088   A00000144   A00000146   A00000185  
A00001083Test tube Ø 80x300 mm for alcohol determination
A00001088Test tube Ø 48x260 mm
A00000144Test tube Ø 42x300 mm 250 ml, 3 pcs/box
A00000146Test tube Ø 26x300 mm 100 ml, 6 pcs/box
A00000185Test tube Ø 50x300mm, 400ml
A00000206   A00000043   A00000005   A00001009   A00000195  
A00000206Spacer for test tube Ø 48x260 mm
A00000043Test tube connection Ø 26 mm, Ø 48 mm and 500 ml Kjeldahl balloon
A00000005Connection Cable, RS232 for balance
A00001009Printer (connection cable included)
A00000195Printer Adapter USB-RS232
A00000254   A00000256   A00000082   A00000285   A00000264  
A00000254IQ/OQ/PQ UDK 169 Manual
A00000256IQ/OQ AutoKjel Manual
A00000082Kjeldahl balloon, 500ml
A00000285Alcoholic strenght kit
A00000264H3BO3 tank (5-liter) with caps
A00000265   A00000266   A00000267   A00000215   A00000247  
A00000265NaOH tank (10-liter) with caps
A00000266H2O tank (20-liter) with caps
A00000267Residues tank (20-liter) with caps
A00000215Waterproof mouse
A00000247AutoKjel carousel for 21x400 ml tubes
A00000316   A00000255              
A00000316Vreceiver - Boric Acid Powder with Indicator for colorimetric titration
A00000255Test Tube Guide Ø 50 AUTOKJEL