Sample Temperature Systems

The ability to change and moreover control the sample’s temperature is of prime importance for virtually all EPR/ESR techniques (e.g., ENDOR, FT-EPR, ELDOR). Bruker BioSpin offers a complete range of temperature systems to suit the particular application need. They comprise:

• Simple and Easy 77.3 K operation and dedicated solution with the Finger Dewar
• 3.8 K to 300 K with the Helium Temperature Control System ER4112HV(also for the FlexLine probes at L-, S-, X-, and Q-band)
  
• 100 K to 600 K with the Digital Temperature Control Systems ER4131VT and ER4141VT with liquid and gaseous nitrogen  
• 300 K to 1273 K with the ER4114HT System
  
• Cryogen-Free Systems In-Cavity & FlexLine Systems

With the cooling side plates, EPR experiments with the ER 4119HS or the ER 4122SHQE at elevated temperatures up to 600 K become readily accessible (together with the ER4131VT and ER 414VT digital temperature accessory). The purpose of the plates is to provide effective cooling and dissipation of excess heat, to in turn prevent and protect the cavity for any damage as a result of sample heating.

Sources of liquid helium have become limited, expensive and delivery unreliable. Bruker now introduces three cryogen-free EPR variable temperature systems for both CW and Pulse EPR spectroscopy.

These systems free the spectroscopist from the need to purchase liquid cryogens to attain the low temperatures required for many EPR experiments. These cryostats utilize standard sample tubes and allow rapid sample interchange. All of these cryostats are compatible with the same compressor and controller.