Aerosol dilution and sampling

As clean room particle counters are limited to a certain concentration range, the challenge aerosol must usually be diluted. In this way both upstream and downstream concentrations can be measured with only one particle counter. The DIL 554 system works only with 28.3 l/min counters and has a dilution ratio of 1:100. The pressure drop of the DIL 554 is about 50 % less than that of our other diluter : this makes it highly suitable for any brand 1 cfm counter. This technique is approved by ISO 14644 standard. This item is always on stock.

Because of isokinetic sampling requirements this has been the shape preferred for many years but now more and more users are switching over to rectangular shaped sampling probes because of the advantages they offer compared with circular inlets. Topas probes are manufactured with rectangular inlets on front of a smooth transition into a cylindrical tube. The design of this special probe is based on international draft standard ISO CD 14644 which specifies a maximum width to length ratio of 1:6. The Topas manufacturing process guarantees high-quality, smooth internal surfaces throughout the probe including all transition regions which minimises particle losses. Tubing port 8 mm diameter ; Materials Aluminium coated and polished, stainless steel polished ; Design Complies with ISO CD 14644-3 (1998) ; Cap Synthetic material, tightly fitting, with connecting arm for HEPA-Filter Length 130 mm (overall length of 235 mm tubing port) ; 170 g ; Average air velocity at sampling flow rate of 1cfm (28.3lpm) 0.45 m/s ; Inlet cross section 1200 mm2 ; Inlet Dimensions 15 mm x 80 mm. Other dimensions on request. Shipped with 5 meters of antistatic tubing. This item is always on stock.