Before revision: Excelitas ended the production of ROs in december URL As of 2021 Vactrol type RO's are still manufactured by Advanced Photonix and at least two factories in URL In the European Union, the production and distribution of Cd-based photoresistors is banned since January 1, 2010.
After revision: Excelitas ended the production of ROs in december URL As of 2022 Vactrol type ROs are still manufactured by Advanced URL and at least two factories in URL In the European Union, the production and distribution of Cd-based photoresistors is banned since January 1, 2010.