Life Safety Test Inc.

      Life Safety Test manufactures the UL Listed Duct Smoke Delivery System (DSDS)  that assists in NFPA code required annual Duct Smoke Detector testing. This  device provides a simple, safe, and cost effective way to deliver an aerosol into ductwork for testing duct smoke detectors. Testing duct smoke detectors with aerosol assures proper operation of the duct smoke detector and all associated control functions. Proper testing ensures the safety of building occupants and provides code compliance. The DSDS is a UL Listed smoke detector accessory

The DSDS device provides the fastest, simplest, and safest way to test duct smoke detectors as defined and required by NFPA standards!



 DSDS with wall or ceiling access port

Entry port cap removed for testing