System Sensor SS-PHOTO-CO — SS-Series intelligent detector combining photoelectric smoke sensing and an electrochemical carbon monoxide cell in one head on a single SLC address.
It is listed both to UL 268 7th edition for smoke and to UL 2075 for system-connected life safety CO detection, which makes it a one-device answer where codes call for both. Sensitivity is monitored continuously and reported to the panel. The head is sold on its own; the base is a separate number.
- One SLC address; supports SK, LiteSpeed and SS Protocol panels
- 15 to 32 Vdc; 200 µA standby at 24 Vdc, 2 mA in alarm, 4.5 mA maximum
- CO response per UL: 70 ppm in 60–240 min, 150 ppm in 10–50 min, 400 ppm in 4–15 min
- Smoke sensitivity 2.39–4.20 percent per ft open area, 1.13–2.39 special application
- 32–122 °F, 15 to 90 percent RH, air velocity to 4,000 ft per min
- CO cell rated about ten years with end-of-life warning and not field replaceable; the photoelectric element keeps working after it expires
The installation instructions say to wire the sensor base, supplied separately: B501-WHITE, B300-6, B200S-WH, B224BI-WH or B224RB-WH. Do not confuse it with SS-PHOTO, which has no CO cell, or SS-PHOTO-T, which adds a thermal element instead.
