Manufactured by Werma Signaltechnik, the SignalSET CO2 indicator 649.000.10 features red, yellow, and green lights to indicate CO2 levels. This product is ideal for environments where corona access control is necessary, functioning similarly to traffic lights. It is commonly used for monitoring air quality in public spaces or offices. https://elecena.pl/product/28348588/werma-649-000-10-signalset-co2-indicator-traffic-light-display-plug-amp-play 2025-04-12 https://elecena.pl/product/28348588/werma-649-000-10-signalset-co2-indicator-traffic-light-display-plug-amp-play 2025-05-13