Description
With the conversion of the test standards for general room air filters from EN 779 to ISO 16890, an additional test aerosol (potassium chloride – KCI) with particle sizes of up to 10μm is required, which needs to remain stable even at low flow rates. Palas is the first manufacturer to produce such an aerosol generator for the the precise testing of filter media. The Palas LSPG 16890 also enables stable and reproducible atomization of NaCl (sodium chloride) and other salt solutions. The Palas LSPG 16890 is available as a standalone instrument and is also used in the latest Palas MFP series filter testing systems to test to ISO 16890.
Key Features
- High number of large salt particles up to 10 μm with KCl
- Highest reproducibility with regard to particle size and particle concentration
- Particle discharge with the bipolar discharge path CD 2000
- For air volume flows from 20 l/min up to 600 l/min
- No corrosion, as main components including dispersion nozzle are made of plastic (POM)
- Direct connection to MFP system
- Simple handling
- Robust, durable, low maintenance
- Cost effective
Chart 1 below shows the particle count distribution of (potassium chloride – KCI) aerosol measured with a Palas Promo series aerosol spectrometer used on a Palas MFP 3000-G filter testing test system. The requirements of the ISO 16890 guideline of at least 500 counts per size interval are easily met.
Figure 1 below shows the comparison of six different size distributions with respect to the number of particles dN measured with the Palas Promo aerosol spectrometer. The sampling time of each measurement is 55 seconds. As the figure shows, the LSPG 16890 provides extremely stable dosage constancy over the measurement period and can therefore be used as the basis for a reliable and fast filter test.
Applications
- Fraction separation efficiency determination for flat filter media in accordance to ISO 16890
- Production of a large quantity of coarse salt particles up to a size of 10 μm
- Laboratory equipment for the generation of salt aerosols
