Type II (DIN 55992)
The Heubach Dustmeter is a monitoring/feedback device designed to help control the dust properties of bulks, powders, granules and fibers, with the unique ability to simulate an array of mechanical handling scenarios.
The Type II functions by the method of the rotating drum and performs according to the German industry standardisation for dust measurement, the DIN 55992. It differs from Type I by an adaptor piece that allows the corse particle separator to be set up in an angle, making it harder for airborne particles to reach the filter housing. This is specifically designed for especially dusty materials. Usually lower airflows and rotation speeds are used for Type II.
A sample is placed into the stainless steel drum, which then rotates at variable speeds, from 0-60 rpm. A controlled and constant airflow (0-40l) carries airborne dust particles out of the drum, through the corse particle separator where heavy particles are separated, and the remaining airborne particles are collected by a micro glass fibre filter at the end. The filter housing (<80g) can be weighed as a whole on any standard laboratory balance before and after the measurement. The gravimetrical difference is then put into relation to the sample size, and thereby describes the dustiness potential of the material.