The AP-63 series is used for measurement of airborne dust concentrations in factories and offices, as well as filtration efficiency, dust removal efficiency measurement, dust exposure testing, concentration control in animal inhalation experiments, control of ventilation and air purifiers, etc. Designed as a dust concentration meter. Three types of L, M, and H are available for different sensitivities, so you can select each model according to your purpose. ●The detection tube is contained in a constant temperature bath, making it less susceptible to ambient temperature. ●The air in the detection section flows vertically, and the anti-contamination measures (clean air) in the optical system ensure stable operation. ●Since all detectors are of the rail pull-out type, maintenance, adjustment, and cleaning are easy. ●Up to 2km can be transmitted by wire with the pulse transmission circuit.