Kidde-Fenwal 27021-1-325 SF 14/01 Depending on how the phones

Depending on how the phones are wired

Duct point temperature sensor with a 10K ohm NTC Type II sensing element

The SIGA-H2D is a dual-reporting heat detector that features a fixed 135 °F (57

PDM to battery 24″ (610 mm) (used with back plane mounted PDM)

Data Sheet: N100-ISO

Kidde-Fenwal 27021-1-325 SF 14/01 Depending on how the phonesDETECT A FIRE (D A F) thermal detectors are UL Listed and FM Approved detection and release devices for use with fire detection systems to activate alarms and extinguishing systems. This Rate Compensated device combines the best features of both fixed temperature and rate of rise detectors.