Maretron High-Temperature Smoke/Heat Detector Kit [SH-003]High Temperature Smoke Heat Detector Kit Maretron's High Temperature Smoke Heat Detector Kit is an intelligent NMEA 2000 networked solution, designed to alert you of unusually fast rises in temperature or smoke. This kit contains a smoke heat detector, auxiliary relay, and sounder that are designed to work in high temperature marine environments, such as engine rooms. The components in this kit are rated from 25C ( 13F) to +70C (158F). This system is