The OptistatTMDry TLEX model provides a temperature controlled sample-in-exchange-gas environment, making it the most versatile Cryofree® or cryogen free top loading cryostat, optimised for different spectroscopy experiments. The OptistatDry Cryofree® family of cryostats for spectroscopy cool samples to helium temperatures without the need for liquid cryogens. It comprises a range of compact cryostats with optical access cooled by a closed cycle refrigerator. They provide significant benefits in terms of ease of use and running costs. The systems enable optical and electrical measurements to be carried out on your samples. These are part of our high performance Optistat family.

Exchange gas environment
The OptistatDry - TLEX model is ideal for samples that have low thermal conductivity, including powder or are in liquid form. Samples for biological, life science or chemistry experiments often can not go into a vacuum environment. The OptistatDry with its sample-in-exchange-gas environment provides all the cooling you need for samples that are not suited for a vacuum environment.

Top loading capability
The OptistatDry - TLEX model is also perfect, regardless of what type of samples you have, if you need to minimise the time between experiments and maximise sample throughput. Removing the sample rod whilst the cryostat is kept cold enables you to swap from one sample to the next in just a few minutes. You can leave the cryostat in situ on the optical bench during sample change, eliminating the need for time-consuming re-alignment of your optical set-up.

OptistatDry - TLEX model features

  • Wide sample temperature range from <4 to 300 K
  • Quick sample change in less than 5 minutes via top loading probe
  • A wide range of different sample holders, windows and wiring options enable you to upgrade your system as your experimental needs develop
  • No liquid cryogens are required
  • Optimised optical access with f1 and a clear view of 15 mm diameter
  • Water and air-cooled compressor options available

 The OptistatDry TLEX model is designed to be:


  • Ideal for a wide range of spectroscopy applications including Raman, FTIR, Photoluminescence, etc.
  • Designed to interface with all types of optical benches; the feet match both Imperial (1 inch spacing) and metric (25 mm spacing)


  • Designed with a modular philosophy that allows the cryostat to evolve with your experiment, allowing you to start with a basic system and as experimental needs change, upgrade to additional functionality at a later date, for example, add extra wiring, different sample holders and windows
  • A wide range of different sample holders, windows and wiring options enable you to upgrade your system as your experimental needs develop

Optical excellence

  • The cryostat comes with f1 and large clear optical access as standard
  • A wide range of different window materials are available to suit different wavelengths; wedged windows and anti-reflection coatings are also available

Simple to use

  • No liquid cryogens are required
  • Air or water-cooled compressors are available; single phase electrical power means the system is easy to install in all standard laboratory environments


  • Sample temperature range < 4 K to 300 K
  • Measured temperature stability ± 0.1 K
  • Cooling power ~ 0.2 W at 5 K
  • Sample space size 20 mm diameter
  • Sample cool down to 10 K with cryostat cold ~ 45 minutes
  • Cryostat cool down to 10 K ~ 360 minutes
  • Optical access - f number f1
  • Optical access - clear view 15 mm diameter

Here are some of the applications the OptistatDry - TLEX model is ideally suited for:

UV/Visible spectroscopy Experiments at low temperatures reveal the interaction between the electronic energy levels and vibrational modes in solids

Infrared 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

Electrical properties Optical and electrical measurements including I-V curves


Download PDF datasheet - Optistat Dry BLV
Download PDF application - OptistatDry magneto-optics applications

Download PDF datasheet - Optistat Dry TLEX

Download PDF application - Optistat Dry Low temperature photolysis studies


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