The D273THR is a four‑wire smoke detector with a 135°F (57°C) heat sensor and a trouble relay. Features - 12 VDC or 24 VDC input - Designed for commercial or residential use - Four-wire application...
The D273IS is a four‑wire smoke detector with an isolated 135°F (57°C) heat sensor and a sounder. Features - 12 VDC or 24 VDC input - Designed for commercial or residential use - Four-wire...
The D273THE is a four‑wire smoke detector with a 135°F (57°C) heat detector and an EOL relay. Features - 12 VDC or 24 VDC input - Designed for commercial or residential use - Four-wire application...
The FCP‑500 Conventional Flush-mount Detectors are UL Listed, open area photoelectric smoke detectors. Use them with commercial fire protective signaling systems and household fire warning systems...