FireAngel Alarms Heat detector 625583 - FireAngel HT-630-EUT, The FireAngel HT-630-EUT heat detector is a wireless, battery-powered device designed for fire protection with a 10-year lifespan. It measures 135 mm in diameter and 60 mm in height, making it suitable for various residential and commercial applications. This heat detector is ideal for environments where traditional smoke detectors may trigger false alarms. FireAngel HT-630-EUT Heat Detector, Wireless, 10-Year Battery, Ø135mm