Edwards SIGA PD Smoke Detector (Replaced by SIGA OSD) This may look like a regular smoke detector, but it's actually a vape sensor. Columbus County Schools now has these sensors in high school bathrooms, an effort to keep kids from vaping. Edwards SIGA OSHCD Smoke Heat CO Detector (NEW) Edwards EST SIGA OSD Intelligent Smoke Detector Vape Detector (& Weed, Smoke) Intelligent Initiation and Detection includes Signature Optica and Signature Edwards Fire Safety