VLF-250-00 VESDA VLF Laserfocus Small Area DetectorVESDA VLF 250 LaserFOCUS Aspirating Smoke Detector (VLF 250 00) The VESDA VLF 250 LaserFOCUS aspirating smoke detector (VLF 250 00) is designed to deliver very early warning fire detection in small, critical environments. Part of the Honeywell Xtralis VESDA range, the VLF 250 continuously samples air through a micro bore pipe network and analyses it using advanced laser based smoke detection technology to identify smoke particles at extremely low