Use this set of two precise Class ZZ NIST traceable GO/NO GO pin gauges to audit the inside diameter of the nozzle on 16.7 L/min PM10 inlets of any manufacturer.
Use this set of two precise Class ZZ NIST traceable GO/NO GO pin gauges to audit the inside diameter of the nozzle on 16.7 L/min PM10 inlets of any manufacturer. This is especially important if using imported inlets. If the nozzle diameter is not perfect, the PM10 cut point will be incorrect. The distance between the nozzle and the impactor target plate is less consequential.