VT Cell Holder: Variable Temperature Cell Holder for IR, UV, and Visible Light Spectroscopy

On both solid and liquid samples, the VT cell is utilized for ultraviolet, infrared and visible spectroscopy. It has a vacuum jacket and refrigerant for sub-ambient cooling and a heater block for above-ambient measuring conditions.

Variable Temperature Cell Holder

Specac’s Heatable Transmission/Flow Cells are compatible with the standard VT transmission cell holder. The 3″ × 2″ slide mounting plate or a BenchmarkTM baseplate are used to install the cell holder into an optical spectrometer sample chamber.

The cell holder comes with NaCl windows, however, alternative NIR, Vis, UV and Infrared transmission window materials are also available.

For solid materials, the VT cell is operational from –190 °C to +250 °C, and for liquid samples, from –70 °C to +250 °C.

Four Port Variable Temperature Cuvette Holder

The Variable Temperature Cuvette Holder is a four-port variant of the regular Variable Temperature Cell Holder that can accommodate quartz glass cuvettes with a pathlength up to 10 mm. This cell holder has been specifically designed for Raman, fluorescence and UV spectroscopic analysis of liquid samples.

The four-port design allows collection of the (scattered) radiation at a 90° angle to the incident radiation, as well as at a 180° angle as evaluated with a standard configuration.

Key Features

Variable Temperature Cell

  • Flow mode: Available for liquid flow cells
  • Programable: Controlled temperatures from –190 ºC to 250 ºC
  • Mounting: Via baseplate or 3 × 2 slide mount
  • Heated jacket: Prevents window condensation
  • Dewar cooling system: Interictal dewar for temperature control

Variable Temperature Cuvette

  • Comes with heated jacket windows to prevent condensation
  • Dewar cooling system available
  • Holds 10 mm pathlength quartz cuvette
  • Benchmark™ Baseplate or 3″ × 2″ mounting options
  • Programmable controlled temperatures from –190 °C to 250 °C (Stability ± 0.1 °C)


  • Catalysis
  • Absorption band study at low temperatures
  • Reaction kinetics
  • Analysis under extreme temperature conditions
  • Oxidation studies
  • PolymorphismPhase transition studies
  • Polymerization studies

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