DMS50 Aerosol Size Spectrometer
Animation of the DMS Series principle
Cambustion Aerosol Instrumentation
Since 2002 Cambustion have offered a range of aerosol instruments designed for engine development applications. The flexible sampling capabilities and and rapid response times of Cambustion's DMS500, DMS50 and SCS systems make these highly suited to aerosol laboratory work, an application which has grown significantly as the research community seeks to update older equipment (e.g. SMPS).
Electrical Mobility Spectral Measurements
The SMPS (Scanning Mobility Particle Sizer TM) by TSI is an example of a scanning instrument offering electrical mobility measurements, using a Differential Mobility Analyzer (DMA) and Condensation Particle Counter (CPC). Such a system offers excellent sensitivity, but requires around 60-90 seconds to make a single measurement.
Cambustion's DMS series instruments offer real-time electrical mobility based particle size/number spectra, with response times as fast as 200ms T10-90%. The Engine Exhaust Particle Sizer (EEPS TM) and Fast Mobility Particle Sizer (FMPS TM) instruments made by TSI operate on a similar principle. These instruments offer improved time response and resolution compared with the SMPS, but at the expense of sensitivity.
The DMS500 and DMS50
With optional integrated dilution for sampling high concentration aerosols, heated sampling systems for sampling wet aerosols and high sensitivity for ambient measurements, the DMS500 is used in laboratories around the world for aerosol measurement, offering particle size distributions in the range 5 nanometres - 2.5 microns.
The DMS50 unit offers similar features to the DMS500, in a smaller and lighter package. With built in 12V DC capability, the DMS50 is perfect for mobile or field studies.
Both instruments offer unique real-time lognormal fitting, a feature which is of particular use when sampling artifical aerosols with narrow gsd.
Filtration Efficiency Studies
Many aerosol experiments involve comparing the input and output of a piece of equipment.
The unique Dual Sampling Accessory for the DMS series allows electrical switching of the sampling location between two points- for example upstream and downstream of a filter.
Tobacco Smoke Measurements via Smoking Machine
The SCS accessory for the DMS500 offers the unique ability to reproduce real-world dynamic inhalation profiles (for example from an inhaler or cigarette) while recording size spectra.
The SCS operates in Constant Volume Sampling mode, allowing straightforward and accurate integration for total mass and number.
Cambridge Particle Meeting
Cambustion also sponsor the annual Cambridge Particle Meeting which is attended by aerosol and particle researchers from around the world.
EEPS TM, FMPS TM and Scanning Mobility Particle Sizer TM are trademarks of TSI Inc