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Heated Sample Changer:
Xsample 631

  • +4
  • The multi-sample changer with no limits for high viscosities
  • Handles up to 56 samples with heated (up to 95 °C / 200 °F) and non-heated samples at the same time
  • Automated cleaning and drying

The Xsample 631 sample changer handles up to 36 heated sample positions for all Anton Paar master instruments. Improved heating leads to short heating periods, time saving, and increased performance. Temperatures up to 95 °C are achieved in the system. Even challenging samples can be measured according to strict ASTM standards. The robust design ensures reliable and maintenance-free operation. A removable magazine with dedicated non-heated positions saves time by facilitating sample handling and even makes a second measuring system obsolete.

Key features

Improved heating performance

Improved heating performance

  • Short heating periods make the sample changer ready for measurement in no time.
  • Even measurement of highly sensitive samples (e.g. waxes) can be performed by using the optional heated waste hose.
  • Heating temperatures up to 95 °C can be achieved and the highest temperature stability is provided.
  • Low power consumption resulting in energy savings is achieved by eight independent electrical heating circuits.
Easy sample handling

Easy sample handling

  • Safe and easy collection of hot samples is facilitated by a removable magazine with a thermal handle.
  • 36 heated positions allow for unattended and fully automated measurements.
  • Optional non-heated positions for samples that are measurable at room temperature even make a second system obsolete.
  • Low maintenance efforts due to electrical heating. No water bath that needs periodical inspection.
No cross-contamination due to the highest cleaning performance

No cross-contamination due to the highest cleaning performance

  • Inside and outside needle cleaning prevents sample cross-contamination and ensures the highest precision.
  • Up to three different solvents can be used in any order to achieve optimal cleaning performance.
  • Optimized cleaning performance is achieved by the use of different cleaning modes.
  • Increased uptime of the instruments can be achieved by automated cleaning procedures directly after the measurements.

Technical specifications

Maximum temperature

95 °C (203 °F) at 20 °C (68 °F) ambient temperature, no cooling

Viscosity range with DMA M

Operation with internal air pump

Up to 10,000 mPa·s at 95 °C heating and measuring temperature

Operation with 2 bar external compressed air

Up to 36,000 mPa·s at 95 °C heating and measuring temperature

Viscosity range with SVM x001

0.2 mPa·s to 5,000 mPa·s at 95 °C heating and measuring temperature

Filling mode

Pressure mode

  • with integrated piston pump
  • with air pump of the master instrument
  • with compressed air

Minimum sample volume per measurement

Approx. 4.5 mL with DMA M
Approx. 6 mL with SVM X001

Number of sample vials

Magazine, heated positions only

36 positions for 12 mL vials (only glass vials allowed!)

Xsample heated / unheated positions

32 positions heated / 24 positions unheated for 12 mL vials (only glass vials allowed!)

Automatic filling and drying

Internal air pump of the master instrument or compressed air selectable

Compressed air supply (optional)

Max. 2.0 bar (29 psi) relative

Quality of air necessary

Class 3 according to ISO 8573-1:
max. particle size: 5 µm
max. pressure dew point: -20 °C (-4 °F)
max. oil content: 1 mg/m3

Environmental conditions (EN 61010)

Indoor use only

Ambient temperature

15 °C to 35 °C (59 °F to 95 °F)

Air humidity

10 % to 90 % relative humidity, non-condensing

Pollution degree


Overvoltage category



Max. 3,000 m (9,840 ft)

Max. temperature of heated parts in case of malfunction

160 °C (320 °F)

Power supply

Power is supplied by the master instrument and the Xsample heating controller

Anton Paar Certified Service

The Anton Paar quality in service and support:
  • More than 350 manufacturer-certified technical experts worldwide
  • Qualified support in your local language
  • Protection for your investment throughout its lifecycle
  • 3-year warranty
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