How it works

The instrument is designed for use in industrial environments and conforms to the german guideline VDI 2066 / Part 1 " Particulate matter measurement -  Dust measurement in flowing gases - Gravimetric determination of dust load" as well as the European standard DIN EN 13284-1 "Stationary source emissions - Determination of low range mass concentration of dust - Part 1: Manual gravimetric method".

The measurement principle can be split in two lines of action:

1. velocity / temperature measurement to determine the correct filter head diameter and
2. isokinetic dust sampling with equipped filter heads on probe

For the first line of action, differential pressure sensors and a thermocouple at the tip of the filter head probe determine the gas velocity and the gas temperature in the stack. Based on this information, the control software calculates the correct filter head diameter and displayed it for each measuring point.

In the second line of action, a frequency controlled vacuum pump sucks out the dust from the stack isokinetically on a certain measuring point. When the pump is on and magnetic valve is open, dust particles were hold back on a filter membrane within the filter head. A defined extracted dust volume or the duration of extraction can be specified by means of software. Both values are based on the expected dust concentration: The lower the dust concentration, the longer the extraction time and vice versa. Examples will be given in the quick start guide.