Description
Depending on the composition of the aerosol to be measured, i.e. the carrier gas component and the particle material, pressure changes or temperature changes in the carrier gas can significantly influence the particle size distribution, e.g. due to condensation or evaporation.
For this reason, the aerosol sensors welas® 2070 HP through to welas® 2500 HP are equipped with a pressure-resistant and heatable cuvette to ensure isobaric and isothermal sampling down to the sensor’s measurement volume.
Figure 1: Heatable and pressure-resistant welas® cuvette
The cuvettes are made of anodised aluminium (black). If the sensor is used in aggressive and corrosive aerosols, the cuvette can be made of stainless steel or other special materials, such as Hastelloy.
Sealed additional disks prevent aerosol from the cuvette from escaping into the surroundings.
The additional disks are easy to clean and replace by the operator.
