The SpectrAlert Advance System Sensor SRK-R replacement model is a red, outdoor strobe with selectable strobe settings of 15, 15/75, 30, 75, 95, 110 and 115 cd. This model also offers mounting plate only – no back box included. System Sensor offers the broadest line of outdoor horns, strobes, as well as horn strobes in the industry.
The strobe shall be a System Sensor SpectrAlert Advance Model listed to UL 1971 and shall be approved for fire protective service. The System Sensor SRK-R strobe shall be wired as a primary-signaling notification appliance and comply with the Americans with Disabilities Act requirements for visible signaling appliances, flashing at 1 Hz over the strobe’s entire operating voltage range. Also, the strobe light shall consist of a xenon flash tube and associated lens/reflector system. Furthermore, the strobe shall be suitable for use in wet environments.
SpectrAlert Advance outdoor horns, strobes, as well as horn strobes shall mount to a weatherproof back box. This includes mounting ceiling and wall products. The notification appliance circuit wiring shall terminate at the universal mounting plate.
Features / Specifications
- Weatherproof
- Horn rated at 88+ dBA at 16 volts
- Rated from –40°F to 151°F
- Rotary switch for horn tone as well as three volume selections



