We are the leading supplier of Real Time Dust Monitor. The Sensidyne Nephelometer is an advanced real-time hand held dust monitor accurately measuring dust concentrations using proven light scatter technology. This portable instrument accurately measures and records dust from 1-10,000 ?g/m3 with resolution to 1 ?g/m3. Sample modes are selectable between 60 second sample, 15 minute STEL, or continuous sampling. The Nephelometer has an internal pump drawing samples into the iso-kinetic sampling inlet where they meet sheath air that guides samples past the particle sensor. The sensor is a photo detector that measures laser light scattered by particulates in the sample stream. The instrument multiplies each measurement by a K-factor and displays the real-time reading on the display of the instrument. After each sample, the K-factor and Environmental Factor Name and STEL, maximum, minimum, and average readings record to the internal data log.