The Honeywell HPM Series Particle Sensor is a laser-basedsensor which uses the light scattering method to detectand count particles in the concentration range of 0 g/m3to 1,000 g/m3 in a given environment. A laser light sourceilluminates a particle as it is pulled through the detectionchamber. As particles pass through the laser beam, the lightsource becomes obscured and is recorded on the photo orlight detector. The light is then analyzed and converted toan electrical signal providing particulate size and quantity tocalculate concentrations in real time. The Honeywell particlesensor provides information on the particle concentration forgiven particle concentration range.