AvaSpec–RS Replaceable-Slit Spectrometer

AvaSpec–RS Replaceable-Slit Spectrometer

Product Catalog: 


For most customers the choice between throughput and resolution is not an easy one. Avantes now offers the possibility for end-users to easily replace a slit through the introduction of our replaceable-slit feature. The replaceable slit option is available on ULS Ultra-low Stray-light AvaSpecs and the NIR256-1.7 spectrometer as well as for the AvaSpec ULS2048LTEC and ULS3648TEC. 

The slit sets contain 25, 50, 100 and 200 µm slits along with a screwdriver tool to facilitate the change. Slit kits are available with SMA-905 connector, as well as FC/PC connectors. Slit sets can be ordered separately for the -RS spectrometer.

No recalibration of the spectrometer is needed when changing slit because of the high-precision slit positioning.

Slit Kit

To fully utilize your AvaSpec-RS series spectrometer with replaceable slit, the Slit Kit is available. It features a complete set with four slits, of 25, 50, 100 and 200 μm. Also included in the kit are the tools to easily change the slit in the spectrometer.

The Slit Kit is available in SMA and FC/PC versions. Both kits can be used on any spectrometer with the replaceable slit option installed.

Slit set connectors SMA-905 or FC/PC
Slit sizes 25, 50, 100, 200 µm (width) x 1 mm (height)
Material Stainless steel
Fixing screws Torx (included)


-RS Replaceable slit, to be added to the product code of the AvaSpec-ULS or AvaSpec-NIR256-1.7
SLIT-XX-RS Replaceable slit with SMA connector. Specify slit size XX=25, 50, 100 or 200 µm, only in combination with AvaSpec-ULS-RS spectrometers and AvaSpec-NIR256-1.7-RS
SLIT-XX-RS-FCPC As SLIT-XX-RS, but with FC/PC connector
SLITKIT-SMA Slit kit containing 25, 50, 100 and 200 μm slits, and the tools to replace the slit. SMA-connectors
SLITKIT-FCPC As SLITKIT-SMA, but with FC/PC connectors

About us

Ara Scientific ApS is a leader supplier for THz cameras, THz sources, fiber optic spectrometers and their accessories. Being a customer oriented in terms of fast delivery, economic prices, precise and accurate technical quotation is our goals and determines our working strategies. 

There are demo setups available for most of the equipments that we provide. So, in case you are interested to test your ideas or preformance of our products, please do not hesitate to contact us.