The F220 Photoelectric Smoke Detectors are ULListed, open-area photoelectric smoke detectors. Usethem with commercial fire protective signalingsystems and household fire warning systems (seeNFPA 72,...
- Two-wire or four-wire bases - 50 ft (15.2 m) maximum spacing between detectors - Visible identification of model: F220‑135 = no ring, - F220‑135F = gray ring, F220‑190F = black ring - Tamper...