The FW521 is an intelligent Heat Detector UL and ULC listed device according to UL 521 and ULC-S530 for Fire Protective Signaling Systems for indoor use with both fixed-temperature alarm and rate-of-rise alarm characteristics.
- UL521/ULC S530
- Addressable Heat Detector
- Fixed Temperature and rate-of-rise
- Comprehensive self diagnostics
- Slim design – visually appealing