To the very day it is the world's only optical measurement method that ensures precise particle and concentration determination over a wide measuring range up to 106 particles/cm3 .
2008 the development led to the welas® digital system (White Light Aerosol spectrometer System) with patented T-aperture technology. The patented optical fibre technology allows reliable quasi-simultaneous measurement at two measurement points with one device and in chemically aggressive waste gases.
Palas® offers with the model groups welas® digital, Inas®, Promo® and Fidas® the most modern, reliable and scientifically most thoroughly investigated optical aerosol spectrometers in the world.
Optical aerosol spectrometers (OAS, ISO 21501-1, VDI 3867-4) and optical particle counters (OPC, ISO 21501-4) show different characteristics. Read more about the substantial difference.
Differences between the aerosol spectrometers
Measurement device: |
welas® digital |
Promo® |
Inas® |
|---|---|---|---|
Possible applications |
for very precise particle size and concentration analyses with a high time resolution |
for process measurement technology and monitoring applications with continuous measurement |
for the measurement of particle size distributions with a high time resolution, e.g. MDI, DPI and pharmaceutical nebulizers |
Time resolution |
10 ms |
1 s |
10 ms |
Handling |
Installed measurement software and analyze software on laptop / PC |
for easy handling via internal touchscreen PC |
Installed measurement software and analyze software on laptop / PC |
Software / Firmware |
PDControl software with many setting and display features, e.g. refractive index |
intuitive Promo® firmware for user-friendly operation |
PDControl software with many setting and display features, e.g. refractive index |
Specials |
for automatic filter testing with Palas® test rigs and the FTControl software |
for integration into process control units external control, e.g. via modbus |
simulation of the throat within inhalation aerosols with dilution ratio 1:10 |
