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ASTM centrifuge Digtor 21 C-U, Orto Alresa

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ASTM centrifuge Digtor 21 C-U, Orto Alresa

Art #:
Digtor 21C-U
Validity: 31.12.2021
Last Update: 14.06.2021
ASTM centrifuge Digtor 21 C-U, Orto Alresa

The centrifuge Digtor 21 C-U is designed for the determination of water and sediments in oils, and characteristics of precipitation and demulsibility and the characterization of waste oils, in process that do not require heating.

It is provided with accessories for spin cylinder-conical tubes of 6 and 8 inches, pear-shaped tubes of 6 inches and tubes for trace elements and 12,5ml.

Its proper for processing samples according following standards: ASTM D 91, D 96, D 893, D 2273, D 2709, D 2711, D 5546, API 2542, API 2548, BS 4385, ISO 3734, IP75.

User friendliness

  • TFT touch screen easy to read and values selection (RPM on steps of 100, RCF on steps of 10xg), time, acceleration/deceleration (1 second steps).
  • The screen which indicates the status can be seen from more than 3 m.
  • Rotor and adapters list on memory.
  • Real values on screen of RCF (xg) based on accessories configuration.
  • Timer count up/down, from 0 or at “set RPM/RCF” for test reproducibility.
  • Progressive acceleration and braking selectable by operator up to 175 ramps.
  • Automatic rotor recognition.
  • Automatic lid latch lock.
  • Microprocessor controlled.
  • Option: free or locked adjustment of RPM/RCF along the run.
  • Program data protection through password selectable.
  • Tubes on upright on rest.


  • Induction motor maintenance free.
  • Max. speed 3.000 RPM/2.425 RCF(on steps 100 RPM/10 xg).
  • Quiet: noise level < 60 dB.
  • 16 memories.


  • Optional Gas Release System: all devices include pre-installation.
  • Isolated avoiding heat lost.
  • Lid locking and holding and lid dropping protection.
  • Imbalance switch off.
  • Chamber of centrifugation in stainless steel.
  • Viewing and calibration port in the lid.
  • Several messages keep the operator informed about the device situation.
  • Guard ring between the chamber of centrifugation and the housing.

Standards and EC Directives

EU Directives: 98/79/EC, 2006/95/EC, 2004/108/EC, 2011/65/EU, 2012/19/EU.
Standards: EN 61010-1, EN 61010-2-020, EN 61326-1.