Hikvision · DS-PDSMK-4
4-Wired Smoke Detector Advanced algorithms provide advanced detection discrimination Sleek low-profile housing design Stable photoelectric smoke sensing chamber. No adjustment or replacement required High immunity against unwanted alarms Surface-mount device (SMD) circuit board design Dual LEDs for 360° visibility 4-wire models for DC 12 V operation 4-wire models include a N/C or N/O alarm relay output