Absorption cells

Q-MACS Multipass Optics (MPO)
The Q-MACS Multipass optics are custom-made innovative products to increase in situ the effective absorption length for infrared absorption spectroscopic applications. It is especially designed to be used with systems of the Q-MACS family. The Multipass optics include a robust and compact set of gold coated mirrors optimized for usage in the mid-infrared and allow a wide range of possible absorption path lengths.

Q-MACS White Cell
The Q-MACS White Cell is a specific configuration of the Q-MACS MPO. It is designed as an extractive measurement cell. This allows to access the unique features of multipass gas cells according to White, e.g. higher insensitivity against temporary misalignment due to vibrations, as well in systems designed for extractive gas monitoring.


Q-MACS Herriott Cell
Our latest Herriott cell design allows to significantly reducing the gas volume by increased optical path lengths. This performance is achieved by utilizing the mirror area more efficiently compared to common Herriott cell layouts. The compact construction makes it well suited to applications, which require a long interaction path between a gaseous medium and emission by a radiation source like mid-infrared lasers, while keeping the dimensions of the optical setup as small as possible. Furthermore, the low gas volume ensures fastest gas exchange rates at very high sensitivity. The Q-MACS Herriott cell is a central part in various sensor systems and OEM modules for the monitoring of ambient trace gas concentrations like the Q-MACS Trace compact series. With its outstanding features the Q-MACS Herriott cell eases the design and implementation of laser-based systems in trace gas monitoring applications. Its robustness and compactness makes it the ideal choice for the integration as an OEM module into industrial products.


The Q-MACS reference gas cell (RGC) is a compact and robust solution for placing sealed reference gas probes in absorption spectroscopic setups. With its metallic body a reliable interface for the integration in fixed optical setups and a high flexibility to adapt the design on specific customer requirements could be ensured. Moreover, its very compact dimensions allow an efficient and and accurate filling. A large variety of molecular gases is routinely filled with high purity into this cell.
With its features, the Q-MACS RGC is used in a wide range of laboratory and industrial applications.