The Siemens SIGA-PS-LG is a smoke detector head designed for reliable fire detection with a fixed temperature rating of 135 degrees Fahrenheit. It offers the ability to set pre-alarm sensitivity across twenty levels in 5% increments, allowing for precise adjustment to suit different environments. The sensor covers a detection range from 0.67 to 3.77% per foot, ensuring accurate smoke measurement. Additionally, this device features non-volatile memory to retain settings even during power interruptions. This smoke detector is available through BSP Automation, providing a dependable option for your fire safety systems.