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Optistat DN2

Oxford Instruments

Optistat DN2 Nitrogen cryostat 77 K, sample in exchange gas

Our nitrogen cryostat, OptistatDN2 is ideal for experiments requiring 77K base temperature, high sample throughput and for samples which are difficult to cool by conduction. Its small footprint is ideal in laboratory where space is limited. No external dewar or transfer tube are required

• Wide temperature range: from 77 K to 500 K
• Quick sample change in less than 5 minutes via top-loading sample probe
• 15 hours cryogen hold time before refills required providing the convenience of a full working day operation
• Superb optical access (f/1) for measurements requiring light collection
• Optimised clear beam throughput (15 mm diameter aperture) allows a large illumination area for measurements involving the detection of low intensity light
• Versatile: wide range of sample holders/rods including liquid cuvette for liquid samples and simple/precise height adjust/rotate sample rod.
• Electrical measurements via 10-pin electrical feed wire to heat exchanger
• Compact size allowing easy integration into commercial spectrometers
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  • Specifications
  • Systems Components/Options
  • Optional items
  • Windows
  • Sample holders/rods options
  • New OxSoft IDK software
  • Applications



Temperature range

77 - 500 K*

Temperature stability

± 0.1 K (measured over 10 min period)

Maximum sample space

20 mm diameter

Sample holder dimensions

19 mm wide x 30 mm long
(optical sample holder version has a 15 mm aperture)

Cool down from ambient to 77 K (mins)


Liquid nitrogen capacity

1.2 L

Hold time at 77 K

≥ 15 hours

• OptistatDN2 nitrogen cryostat
• Sample holder and rod
• Up to five sets of windows. (four radial; one axial). Each set includes two windows (radiation shield and outer case windows)
New Mercury iTC temperature controller
• High vacuum pumping system
• Wiring and electrical connections to the sample
• Simple height adjust and rotate sample rod: provides sliding adjustment with locking screws to hold a fixed position. The range of vertical motion is 32 mm. Positioning accuracy is 0.5 mm( height) and 1 degree (rotation).
• Precise height adjust and rotate sample rod provides height adjust and with a resolution of 10 µm and a goniometer for setting the rotation angle with a resolution of 12 minutes.
• Liquid cuvette for liquid samples
• A wide range of window materials can be fitted to the OptistatDN2 to meet specific spectroscopy applications
• Special windows with non-parallel faces and anti-reflection coatings are available
Adding to the OptistatDN2 versatility is the ability to fit several different sample rods and holders: • Standard sample rod: single sample holder with 10-pin electrical access
Simple height adjust and rotate sample rod: height adjust range 32 mm with positioning accuracy 0.5 mm, rotate adjust range 360° with positioning accuracy 1°
Precision height adjust and rotate sample rod: Height adjust range 30 mm with 10 µm resolution, rotate adjust range 360° with 12 minutes resolution
• In addition to the sample positioning and 10-pin electrical access, both height adjust and rotate sample rods feature a double sample holder. For applications such as FTIR, the reference and sample can be measured without having to move the cryostat or exchange samples
• A liquid cuvette sample holder enables liquid sample experiments
• Additional or replacement sample rods are available via the Oxford Instruments Direct - Cryospares on-line catalogue
With the new Oxsoft IDK you have new levels of control. You can design remote control and configuration programs and integrate your system into your preferred experiment control architecture.
See also the OptistatDN-V2 for this cryostat with sample in vacuum.
UV / Visible spectroscopy: Experiments at low temperatures reveal the interaction between the electronic energy levels and vibrational modes in solids.
Infra-red spectroscopy : Low temperature IR spectroscopy is used to measure changes in interatomic vibrational modes as well as other phenomena such as the energy gap in a superconductor below its transition temperature.
Raman spectroscopy : Lower temperatures result in narrower lines associated with the observed Raman excitations.
Photoluminescence : At low temperatures, spectral features are sharper and more intense, thereby increasing the amount of information available.
Gas absorption : We have developed a special cryostat in partnership with Quantachrome Instruments to fit their autosorb-iQ gas sorption analysers.