When high value assets, equipment or irreplaceable items are at stake, early warning of a smoke or fire problem, is essential. Air sampling or air monitoring actively pulls in room air to a special chamber where it can detect the presence of particles that are created in the very early stages of combustion, even before smoke is visible. With the world’s widest sensitivity range, VESDA air monitoring produces multi-level warnings at the very early stage of an impending fire. This provides the valuable time necessary to initiate a flexible, appropriate response.