Kidde 70-520000-001 Heat Detector ROR

Kidde THD-7052 and THD-7053 are thermistorbased electronic Heat Detectors with a 135°F (57°C) Fixed Temperature set point. In addition, the Model THD7052 has a Rate-Of-Rise of temperature detection feature rated at 15° F (8.3° C) per minute. Both detectors have advanced solid-state, low-voltage, surface-mount circuitry and are designed for 2-Wire and 4-Wire installation using the appropriate Detector base. The detectors are designed for Open Area Protection (UL 521) and may be installed in systems intended for Releasing Device Service through use of a compatible Fire Alarm Control Panel