A liquid helium cooled, vacuum loading continuous flow (CF) cryostat with a special narrow tail for optical microscopy and spectroscopy measurements that require:

  • Small working distance
  • 2.2 - 500 K temperature range
  • Optical access in two orthogonal directions
  • Integration into an electromagnet
  • Operation in any orientation

The core 'cold unit' of the MicrostatHe Rectangular Tail, MicrostatHe and OptistatCF-V  is interchangeable, enabling a modular set of optical cryostats for different experimental set-ups by swapping only the outer body.


Optical specifications Window thickness 1.0 mm
Clear access diameter  20 mm
Sample holder to window top surface 8 mm
Angle of admittance (to surface of sample
holder at centre)
Max sample thickness 4 mm
Max sample diameter 20 mm


System Options


  • As a standard, the tail has four optical access ports  system, fitted with Spectrosil B windows
  • A wide range of window materials can be fitted to the MicrostatHe Rectangular Tail, please contact your local sales representative

Pump options

  • A simple GF4 oil-free vane pump  is supplied for operation to 3.2 K
  • Lower temperatures to 2.2 K use a single-stage EPS40 rotary pump

Temperature controller

  • MercuryiTC intelligent cryogenic environment controller

Transfer tubes

  • Choose an LLT600 or LLT700 low loss LHe transfer tube for minimum helium consumption  – less than  0.45 l/hr at 4.2 K
  • An automated  needle valve can be fitted to the LLT to allow automation of the helium flow regulation and optimisation of the helium consumption

Software control

  • Oxford Instruments electronics products are controllable through the software using RS232, ISOBUS or GPIB interfaces
  • LabVIEW virtual instruments are provided for Oxford Instruments electronics products to allow full PC-based control and monitoring. These can be integrated into a complete LabVIEW data acquisition system



The MicrostatHe Rectangular Tail works on a continuous flow principle using an oil-free pump to draw liquid helium from a storage vessel along a transfer tube to the heat exchanger ('pull mode'). Temperature control is achieved by a combination of automatic or manual helium flow control and power dissipated in an electrical heater, regulated using a temperature controller.

The cryostat can also be used in 'push mode', in that case the flow of liquid helium is generated by pressurising the storage dewar. The advantage is that the need for a gas flow pump is removed thus saving cost and eliminating the noise and vibration generated by the pump.


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.

Gas flow controller - The VC-U gas flow controller now includes the nitrogen and helium flow meters as standard.

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 gas 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.

Example MicrostatHe: You can control the temperature with a sensor and heater at the heat exchanger, monitor and control the gas flow AND have an extra sensor channel to measure sample temperature.

Magnet power supply - Best in class stability performance and optimised for accuracy and low noise.


Downloads & further information

To download our Microstat product guide click here


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