The housing and the sampling pipe are stainless steel which avoids corrosion.  It is thermo-isolated and has an internal automatic ventilation and heating system.  Our patented dehumidification system to avoid loss of the semi-volatile fraction. The sample is collected by a sample pipe with integrated vacuum dryer.  It is thermo-isolated and has an internal automatic ventilation and heating system.  The sample air supply and the vacuum pump for the sample air dehumidification are built in.  This system also uses an advanced low water sensitive laser and our specially patented light-scattering technique.  The sample is  collected by a sample pipe with integrated vacuum dryer. 

Dimensions (cm): Outside size 65 h x 45 w x 40 d

The #179 aerosol spectrometer has a resolution of the mass calculation of 1 µg/m³ with a flow rate of 72 liters/hour or 1.2 liters/minute. The constant flow rate is maintained by a large external flow controlled pump. Sheath air assures cleaning of the optic which means extended periods of remote operation are assured.

Technical specs for spectrometer:

Measurement principle:

 Laser light scattering with a detection diode at 90°

Laser light scattering principle

Measurement range:

 0.25 to >32 µm in 31 channels

Channel sizes:

0.25 /  0.28 /  0.3 /  0.35 /  0.4 /  0.45 /  0.5 /  0.58 /  0.65 /  0.7 /  0.8 /  1 /  1.3 /  1.6 /  2.0 /  2.5 /  3 /  3.5 /  4 /  5 /  6.5 /  7.5 /  8.5 /  10 /  12.5 /  15 /  17.5 /  20 /  25 /  30 /  32 µm

Count concentration:

1 to 2,000,000 particle/liter or  0.1 to > 1500 µg/m3

Reproducibility:

 +/- 3 % in max. range and 230/110 VAC inside the outdoor housing