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Microstat N2

Oxford Instruments

Microstat N2 Microscopy cryostat 77 K Nitrogen cooled

Our nitrogen cooled 77 K cryostat, MicrostatN2 is very compact and lightweight and only requires a compact nitrogen container which is very convenient when space is limited.

• Wide temperature range: from 77 K to 500 K
• Extremely compact: 90 mm diameter by 24 mm thickness.
• Economical use of cryogens: less than 0.5 L/h
• Quick cooldown: 80 K in less than 10 minutes
• Adjustable sample holders accommodate samples up to 8 mm thickness
• Easy integration into commercial microscopes facilitated by its compact size and short working distance (as low as 3 mm). Interface place available as option for attaching the MicrostatN2 directly into microscope translation stage
• Suitable for reflection and transmission experiments via choice of sample holders
• Electrical measurements via 4-pin electrical feed wire to heat exchanger
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  • Specifications
  • Windows
  • Temperature controller
  • Applications
  • Acessories
  • PFDs

Operating temperature range

77 K to 500 K

Temperature stability

± 1 K from 80 K to 120 K

± 0.5 K from 120 K to 500 K

Nitrogen consumption

< 0.5 litres/hour at 80 K

Cooldown time

< 10 minutes from ambient to 80 K with transfer tube cold

Sample holder drift at constant temperature

± 1.0 μm /hr (see note 1)

Maximum sample size

20 mm diameter x 2 mm (in reflection)

15 mm diameter x 8 mm (in transmission)

Sample window material

Spectrosil B fused quartz

Other materials available on request

Standard temperature sensor

Platinum resistor

Sample change time

~30 minutes


0.4 kg

NOTE 1. Approximate measurement; the stability is not measured or guaranteed and will be dependent upon the final system’s configuration and the environment that the equipment is used in.

Optical Specifications


Window Thickness

0.5 mm

1.5 mm

Clear access diameter

10 mm

25 mm

Sample holder to window top surface

3 mm

3 mm

Angle of admittance
(to surface of sample holder at centre)



Max sample thickness

2 mm

1 mm

Max sample diameter

20 mm

20 mm

NOTE: All dimensions are approximate and relate to the top window with plain sample holder.
• A wide range of window materials can be fitted to the MicrostatN2 - see the ´Windows for optical cryostats guide´ in Downloads and Links
• A 0.5 mm thick, 10 mm optical access Spectrosil B quartz window is fitted as standard. We also offer an option for a 25 mm access diameter, 1.5 mm thick
• Transmission experiments use an alternative bottom flange with a second window fitted and a transmission sample holder
• Additional or replacement window flanges available via the Oxford Instruments Direct - Cryospares® on-line catalogue
• New MercuryiTC Intelligent cryogenic environment controller

Research areas

Technique (optical & microscope based techniques)

Study of molecular bonds in crystal lattices


Study of molecular energy levels

Micro-Raman scattering and inelastic light scattering

Studies of Quantum Dot structures in AS/GaHS


Semiconductors -
Quantum systems -

Micro-Photo luminescence

NEW Transfer tube - It plays an important part in the overall helium consumption and base temperature capability of helium cooled cryostat. 
Oxford Instruments Low Loss Transfer tubes (LLT) use the cold gas exiting the cryostat to cool the shields surrounding the incoming liquid within the transfer tube.  As a result, the consumption of our cryostats is the lowest on the market, dramatically reducing your running costs.
We can also offer an extra flexible transfer tube for those with restricted space in their labs.  Please note that as this does not use the gas cooled mechanism, helium consumption will be higher that for the LLT range.  However it will be well suited to those who need lightweight and more flexible transfer tube.
NEW Gas flow controller - The new VC-U gas flow controller now includes the nitrogen and helium flow meters as standard.
NEW Intelligent cryogenic environment controller - Easy monitoring and control of the sample stage.  The MercuryiTC controller combines several instruments into one allowing temperature control at the heat exchanger and glas flow control as well as an extra sensor channel for thermometry measurement directly at the sample stage.  Everything can be accessed through touch screen front panel and remotely via Labview compatible Oxsoft IDK software.