Surveillant Fire Limited

Extra Low Voltage Solutions

Medium Area Detector

  • Out-of-the-Box Installation and Commissioning
  • Ultrasonic Airflow Sensing
  • Laser-Based Absolute Smoke Detection
  • Pre-engineered pipe network designs
  • Programmable Alarm Thresholds
  • Clean air barrier optics protection
  • Instant Recognition Display
  • Instant Fault Finder
  • AutoLearn Smoke
  • AutoLearn Flow
  • Field Service Access Door
  • Multiple Event Logging in separate logs – up to 18000 events
  • Offline/online configuration capability
  • Up to 500 sqm (5000 sq ft) coverage


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The VESDA VLF-500 detector is a very early warning smoke detector designed to protect small, business-critical environments of less than 500 m2 (5000 sq. ft.) The detector works by continually drawing air into sampling holes in a pipe network. The air is filtered and passed into a detection chamber where light scattering technology detects the presence of very small amounts of smoke. Detector status information is communicated on the detector display and via relays or optional interface cards. The VLF-500 can be installed and commissioned out-of-the-box without the need for a special interface or software programming tools.