Silent Knight SK-PHOTO-R-W Photoelectric Smoke Sensor IN STOCK The GN-503 (120VAC/9VDC) Series of

The GN-503 (120VAC/9VDC) Series of combination photoelectric smoke and electrochemical sensor carbon monoxide alarms are for use as evacuation devices in all dwelling units

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Silent Knight SK-PHOTO-R-W Photoelectric Smoke Sensor IN STOCK The GN-503 (120VAC/9VDC) Series ofModel SK PHOTO R W is a plug in type smoke sensor that combines a photoelectronic sensing chamber with addressable analog communications. When used in duct applications with a DNR(W), testing can be done remotely using approved System Sensor test accessories, eliminating the need for a test coil. The sensors transmit an analog representation of smoke density over a communication line to a control panel. Rotary dial switches are provided for setting