Conventional Smoke Detector-2 Wire

2-wire, 24V, MCU; ZDD-314S-2 Conventional Smoke Detector, Operates by Advanced MCU Expert Algorithm Software, and it is professional for conventional fire alarm control panels. This sensor is photoelectronic detector uses a state-of-the-art, optical sensing chamber. And it's designed to provide open area protection, and to be used with most conventional fire alarm control panel. Model: ZDD-315SH-2(with heat sensor) combine a photoelectronic sensing chamber and 135