Wisualarm by Dahua DHI-HY-SA30A Standalone Smoke Detector The Wisualarm DHI-HY-SA30A is a standalone smoke detector designed for continuous monitoring of smoke concentration indoors. Thanks to split-spectrum sensor technology, the device reliably detects smoke and, when the alarm threshold is reached, triggers a loud audible alarm with additional visual LED signaling. https://elecena.pl/product/30450770/dhi-hy-sa30a-smoke-detector-10-year-battery 2026-06-27 https://elecena.pl/product/30450770/dhi-hy-sa30a-smoke-detector-10-year-battery 2026-07-19