<General infomation>
<SP3 automatic sedimentation dust measuring instrument>
<SP2 manual sedimentation dust measuring instrument >
<SP4 Sedimentation dust measuring instrument>
<CDD Counterflow sedimentation tube>

 
General Information
Our measuring instruments are all based on one common concept: They simulate the technical handling of bulk material samples in a standardised manner and simultaneously measure the concentration of airborne materials that are released.

Two different simulation processes are available:

1. The “Sedimentation Method" (DIN 55992-2)
   A feeding system instantaneously releases a sample of the substance into a sedimentation tube. The airborne materials that are released during the fall and on impact begin to sediment. The measuring instrument records the
   sedimentation process.
2. The "Continuous Drop Down" method (DIN 33897-2)
   The material to be tested is fed into a sedimentation tube with counterflow as a continuous mass stream. The proportions of respirable E-dust and A-dust, which can enter the alveoli, from the resulting airborne materials are gravimetrically determined by means of partial flow extraction.

SP3 automatic sedimentation dust measuring instrument

The SP3 simulates the formation of dust that arises during processes such as packing, metering or filling substances using the sedimentation method (DIN 55992- 2):

• The sample of bulk material to be examined falls through the sedimentation tube of the SP3. While it is falling in the enclosed tube the sample releases its unbonded, airborne fine dust into the air. This is followed by sedimentation.
  
• At the bottom of the sedimentation tube is a laser-optical sensor system with which the instrument’s process computer records the sedimentation process and stores this information for the subsequent evaluation.
  
• Measuring, evaluation and cleaning take place fully automatically in just 60 seconds.
  
• Applications: Anywhere where large quantities of samples occur, for example in the areas of process technology, production control, quality assurance, occupational hygiene.

SP2 manual sedimentation dust measuring instrument

The SP2 is the manually operated version of the SP3automatic. Like the SP3, the measurement is based on the sedimentation method.

Areas of use:

• Applications where a small quantity of samples occur and which do not require a fast, automatic measuring process, such as during the incoming goods inspection at bulk material processing plants.

SP4 Sedimentation dust measuring instrument with automatic fractionating extraction device for sedimenting fine dust

Like our SP3automatic, the SP4 also operates according to the sedimentation method (DIN 55992-2), and with its laser-optical
system it determines the sedimentation process of the airborne fine dust proportion of the bulk material sample and stores this information for subsequent evaluation.

At the same time the sedimenting fine dust proportion is collected in a particle size-selective manner to be taken to the laboratory for further examination.

For example

• gravimetric determination of the total fine dust or specific fractions.
• Microscopic analysis of the fractionated sediment. Micro-biological or chemical examination (e.g. identification of free enzymes in the fine dust of laundry detergents).

CDD Counterflow sedimentation tube

With our counterflow sedimentation tube CDD we offer a dust measurement instrument that uses the Continuous Drop Down method according to DIN 33897-2.

The CDD was developed in the Institute for Dangerous Substance Research of the Mining Occupational Accident Insurance Fund with respect to TRGS 900 (German technical guidelines governing the list of maximum concentrations at the workplace).
A metering device discharges the bulk material sample via a sedimentation tube into a tube with counterflowing air. At the same time, above the dust discharge point, A-dust, which can enter the alveoli, and respirable E-dust are separated on to filters by simultaneous partial flow extraction and then gravimetrically determined.