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 |
