Capillaries for optical spectroscopy measurements deliver superior performance to standard quartz tubes used for structural analyses methods such as SAXS - small angle X-ray scattering, XRD - X-ray diffraction, EPR - electron paramagnetic spectroscopy and others.

Key properties

  • 100% gas tightness, no pores
  • Resistance to high temperatures up to 2000°C.
  • Resistance to high pressures.
  • Resistance to most aggressive chemicals
  • Purity 99,995%
  • Non-magnetic


Sapphire capillary can operate at much higher temperatures and pressures than ordinary quartz capillary, with good resistance against wider group of aggressive chemical substances and plasma environments. Sapphire is transparent on wider range of wavelengths from ultraviolet to near infrared region.

Typical applications:

  • various analytical and experimental methods
  • Sapphit™ sapphire capillaries are commonly used for studies under water supercritical conditions


Typical design of optical spectroscopy sapphire tube

Standard "as grown" capillaries

Inner diameter down to 0,6 mm Standard dimensions:
OD 1 mm / ID 0,6 mm 
OD 1,57 mm / ID 1 mm - designed to fit the PEEK HPLC set-up
Wall thickness down to 0,2 mm
Length up to 1500 mm


Machined capillaries

Inner diameter down to 0,6 mm Standard dimensions:
OD 0,8 mm / ID 0,6 mm
OD 1 mm / ID 0,8 mm
Wall thickness down to 0,1 mm!
Length up to 60 mm