As a technician at firealarm.com, I’ve had the opportunity to work with the new System Sensor SPSWL extensively. The SPSWL offers several improvements over the previous SPSW model. It features enhanced sensitivity and reliability, ensuring quicker detection of smoke and more accurate alarm activation. Additionally, the SPSWL incorporates advanced technology for better communication with the fire alarm control panel, leading to quicker response times in case of emergencies. Overall, the SPSWL is a significant upgrade from its predecessor, providing improved performance and peace of mind for building occupants.