A security monitor is a display at a viewing post where guards or operators watch camera feeds. The evidenced model in this use is the BNC CCTV monitor ZC220, a 21.5 inch display with 1920 by 1080 resolution, BNC input among D-SUB, DVI, VGA and HDMI interfaces, and a brightness of 350 candela per square metre. Those figures belong to that model.
Security viewing differs from office viewing in duration and attention. An operator may watch a feed for hours, so a steady image, a suitable brightness for the room and a size matched to viewing distance matter more than a high refresh rate. A single post suits a single display, while a wall of feeds suits several displays or a larger display, and the choice should follow the number of feeds and the room layout.
The BNC input matters because many existing camera installations output over BNC. A monitor with BNC input takes that feed directly, while a monitor without it needs an adapter or converter. State the feed type and the number of feeds in an enquiry so the company can confirm a matching display.
Order quantity and lead time are confirmed per model in enquiry, and prices are not published on this site.