The m-e modern-electronics Light Curtain 90 dB BELL-221 is a mini alarm system designed for reliable intrusion detection. Manufactured by m-e modern-electronics, it features an audible alert of 90 dB for heightened security. Typical applications include residential and commercial premises where discrete yet effective protection is desired. https://elecena.pl/product/28918390/m-e-modern-electronics-bell-221-light-curtain-90-db-8-tones-360-sensor 2025-06-07 https://elecena.pl/product/28918390/m-e-modern-electronics-bell-221-light-curtain-90-db-8-tones-360-sensor 2026-08-23