The ARCoptix GASEX OEM module represents a highly efficient, rugged and fully integrated solution for gas spectroscopy in our product portfolio. Our OEM010 module is coupled to a low volume (0.2L) heated (up to 200°C) gas cell, in which light experiences multiple reflections, resulting in an integrated optical path of 5m with more than 50% transmission. The cell's internal optics is rhodium and gold coated, making it extremely resistant against most chemicals including acid gases such as HF, HCl, HBr...

The GASEX OEM has been standardized to operate with a resolution of 0.5cm-1, which makes it compliant with the newest legal regulations for emission measurements. Featuring a USB 2.0 connection, the unit can also host an embedded single-board computer for standalone operation. Typical limit of detection (LoD) is in the range of 1 ppm for most of the gases – with 1 minute integration time.

Characteristics

• Optimized Gas cell and FTIR Assembly
• Compact and rugged
• Resolution of 2 cm^-1 down to 0.5 cm^-1
• MCT Detector with high detectivity TE-cooled MCT detector 5000-830 cm^-1 (2-12μm)
• 5m heated gas cell with small volume (0.2L)
• USB connectivity and SDK available
• Cost effective

Example

 

The heart of the FT-Rocket is dual corner-cube (retro-reflector) interferometer. The two corner-cubes are solidary to a common swinging arm, which rotates to create an optical path difference in the two arms of the interferometer.
This type of design is called a permanently aligned interferometer, as the alignment of the system is known to be the most robust against vibrations and temperature drifts. It never has to be realigned.
The swinging arm of the interferometer rotates on wear-free flexure system, making this mechanical system extremely robust and durable.

For measuring the movement of the mirrors, a solid-state reference laser is coupled into the interferometer. Compared to classic HeNe lasers, the solid-state lasers that we use are more compact and have a much longer life-time. They have a very low temperature-induced wavelegnth drift and, when kept at constant temperature with a Peltier element, their wavelength can be stabilized to a few PPM, thus providing a very accurate and reproducible wavelength scale. This is crucial for ensuring a day-to-day and unit-to-unit consistency..