VLF 500 Aspirating Smoke Detector

VLF 500 Aspirating Smoke Detector. The VESDA VLF by Xtralis is an aspirating smoke detector ideal for small, business-critical spaces. Available in two models, the VLF-250 covers up to 250 m2 (2,500 sq. ft.), and the VLF-500 covers areas up to 500 m2 (5,000 sq. ft.).