The Potter CR-135W is a fixed & rate-of-rise temperature heat detector. The detector consists of a spring-loaded plunger retained by a fusible alloy that releases when the ceiling temperature reaches 135°F (57°C). When released, the plunger strikes a normally open set of contacts and holds them closed. UL and ULC Listed Fixed temperature and rate-of-rise operation Operates when ceiling temperature reaches 135°F (57°C) or rises at 8°C/min rise Normally open (NO) contacts Terminal bar with screws for easy wiring
