round windows type 202-QX made of Extended Range quartz glass, wavelength range from 200 nm to 3500 nm
Hellma® precision windows are manufactured 100% in Germany and are suitable for all common spectrophotometers.

Highest precision
Hellma® precision windows are characterized by maximum precision in terms of pathlength accuracy and parallelism. This guarantees continuously reproducible measurement results.

Excellent transmission
The use of a selected special optical glass gives Hellma® precision windows excellent transmission > 80 % for exact measurement results.

Safe handling
Hellma® precision windows have chamfered edges that enable safe and comfortable handling. The risk of chipping is also minimized.

Sustainable
Hellma® precision windows can be easily cleaned and reused and therefore remain in use for a long time. A sustainable and environmentally friendly alternative!

Certified production
Hellma® precision window are manufactured in accordance with EN ISO 9001 / EN ISO 14001 and meet the highest optical standards. The declaration of conformity is available for download on the Hellma website. Further certificates (certificate of compliance 2.2 and inspection certificate 3.1) are available on request.