The Tyco 712H (Part No. 516.900.104) is a marine conventional fixed-temperature heat detector designed for dependable fire detection in areas where smoke detectors may be unsuitable. It uses fixed-temperature sensing and is classified as an A1S heat detector under EN 54-5, with a static response range of 54–65°C. The detector is designed for conventional two-wire fire alarm systems and provides reliable fire detection while helping reduce false alarms. It is also a drop-in replacement for compatible legacy Tyco 600 Series detectors.
Features
- Fixed-temperature heat sensing
- A1S heat detector classification
- Nominal fixed response temperature of 60°C
- Designed for conventional two-wire detection systems
- Microprocessor-based detection technology
- Improved false-alarm rejection
- Suitable for marine and industrial environments
- Compatible with 4B, 4B-D, 5B and 5B-D mounting bases
- Drop-in replacement for compatible 600 Series detectors
- Low operational voltage
- Insect mesh protection
- IP55 ingress protection when installed with suitable deck-head mounting
- Approved for EN 54, MED and IACS applications
Typical Applications
- Marine fire detection and alarm systems
- Ship accommodation and service areas
- Engine rooms and machinery spaces
- Galleys, kitchens and utility areas
- Electrical and equipment rooms
- Offshore installations
- Areas containing dust, fumes or environmental conditions unsuitable for smoke detectors
- Fire alarm system replacement and retrofit projects






