Aerosol Spectrometers

The success of the Palas® aerosol spectrometers is based on the development of the measurement method with a white light source, 90° scattered-light detections and an optically defined measurement volume by the University of Karlsruhe, KIT. 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® 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 Time resolution 10 ms 1 s Handling Installed measurement software and analyze software on laptop / PC for easy handling via internal touchscreen PC Software / Firmware PDControl software with many setting and display features, e.g. refractive index intuitive Promo® firmware for user-friendly operation 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

Inas® system

Measurement system for particle size and concentration analysis of individual spray bursts of inhalers (MDI and DPI)

Promo® system

Aerosol spectrometer system for process measurement technology and monitoring applications with continuous measurement

Promo® LED system

High resolution aerosol spectrometer for particle sizing and counting from 145 nm up to 100 µm with newest LED-technology


Resp-Aer-Meter System

Respiratory Aerosol Meter – Fastest detection of particles in breathing air in the size range of viruses like Covid-19

welas® digital system

*** Product superseded by PROMO Aerosol spectrometer ***

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