Transmission cells for liquid and solid analysis

From Specac

Specac transmission cells enable transmission measurements of liquid and solid samples under controlled temperature conditions. The modular system supports static and flow-through configurations and, with the appropriate cell holders, covers a wide temperature range from -190 °C to +250 °C.

Depending on the application, variants are available with 1/16" Swagelok connections (flush or with flow tubes), front ports for static measurements, and robust pellet holders for solid samples up to 8 mm thick. A wide selection of spacers allows the volume inside the cell to be flexibly adjusted. The choice of window materials enables flexible adaptation to UV, NIR, and MIR spectroscopic applications.

Features

Modular transmission cuvette system for liquid and solid-state analysis
Temperature-controlled measurements from -190 °C to +250 °C
Configurations for static and flow-through FTIR measurements
Removable design for easy cleaning and flexible customization
Wide selection of window materials for UV, NIR, and MIR spectroscopy
Spacers ranging from 0.006 mm to 0.20 mm
Compatible with VT cell holders and heating systems
Flow cells with 1/16" Swagelok fittings available
Solid sample holders for pellets and samples up to 8 mm thick

Further information

Transmission Cells for Liquid Analysis

The heatable liquid transmission cells are designed for transmission measurements of liquids under controlled heating or cooling conditions. The stainless steel cells support temperature ranges from -70 °C to +250 °C and are suitable for both static and flow-through measurements.

Static versions use Luer fittings for easy sample injection, while flow cells are equipped with 1/16" Swagelok fittings for use in pump-based systems and inline process analysis. Different spacers allow for flexible adjustment of path length and sample volume.

Available window materials:

NaCl
KBr
CaF₂
BaF₂
ZnSe
UV-Quartz

The removable window design makes cleaning, maintenance, and window replacement easier.

Transmission Cells for Solid-State Analysis

The heatable solid-state transmission cells were developed for thermal analysis of pellets and solid samples within a temperature range of -190 °C to +250 °C.

The system supports variable aperture sizes for samples with diameters ranging from 12 mm to 30 mm and sample thicknesses up to 8 mm. Depending on the configuration, the systems can be combined with electric heating jackets, water-heated holders, or VT cell holders.

The systems are particularly suitable for:

Thermische Stabilitätsanalysen
Phasenübergangsuntersuchungen
Temperaturabhängige FTIR-Messungen
Kryogene spektroskopische Anwendungen
Variable Temperature (VT) Cell Holder

The VT cell holder expands the system for cryogenic and high-temperature spectroscopy applications. The vacuum-insulated assembly combines a coolant Dewar, a heating block, and a cell holder, enabling temperature-controlled measurements from -190 °C to +250 °C, depending on the configuration.

The VT cell holder is compatible with Specac liquid and solid-state transmission cuvettes and supports various UV, Vis, NIR, and IR window materials. Additionally, a four-port version is available for Raman, fluorescence, and UV spectroscopy, supporting measurement geometries at 90° and 180°.

Compatible configurations:

Static liquid cells
Liquid flow cells
Solid-state transmission cells
Cryogenic FTIR setups
Raman and fluorescence spectroscopy

Models

Liquid Transmission Cells

Configuration	Application	Temperature Range
Static Cells	Liquid Measurements	-70 °C to +250 °C
Flow Cells	Inline and Process Measurements	-70 °C to +250 °C

Solid-Sample Transmission Cells

Configuration	Application	Temperature Range
Heated Solid-Sample Cells	Pellets and Solids	-190 °C to +250 °C

Temperature-Controlled Cell Holders

Cell Holder	Application	Temperature Range
Standard Cell Holder	Measurements at Room Temperature	Ambient / Room Temperature
Water-Jacketed Cell Holder	Controlled Heating Applications	Up to +90 °C
Electric Heating Jacket	High-Temperature FTIR Measurements	Up to +250 °C
VT Cell Holders	Cryogenic and High-Temperature Spectroscopy	-190 °C to +250 °C