The DLPI is a cascade low pressure impactor to classify airborne particles into 13 size fractions. The size classification is made from 30 nm up to 10 µm with evenly distributed impactor stages. Additional back-up filter can be used to collect particles smaller than 30 nm. The impactor is available with 10 and 30 l/min sample flow rate.

DLPI has 13-stages so particles are size classified into 13 size fraction inside the unit. The particles are collected on 25 mm collection substrates that are weighed before and after the measurement to obtain gravimetric size distribution of the particles. Other DLPI characteristics include low inter-stage wall-losses and robust yet easy-to-use operation.

Applications:

Suitable for a wide variety of applications including power plant and vehicle emission measurements, engine blow-by measurements, air quality studies and pharmaceutical aerosol device testing. Invesigate Universities involved in aerosol research.

The DLPI impactor has the same design as the impactor used in the real-time particle size distribution measurement device ELPITM(Electrical Low Pressure Impactor) which enables an easy upgrade of the DLPI into an ELPI.

This a three stage cascade impactor for determining particle gravimetric mass size distribution. The impactor size classifies particles into four different size fractions; in each size fraction the particles are collected on a filter that is analysed gravimetrically or chemically after the measurement. The impactor cutpoints are 10, 2.5 and 1 µm; if needed some of the stages can be removed from the assembly to make a simpler setup.

The PM10 impactor is available with two different sample flow rates, 10 or 30 l/min. The particles are collected on Ø25 mm substrates on the impactor stages, and a 47 mm filter on the back up filter stage. Different material substrates are available from Dekati.

Note: Can be used with manual stack sampling equipment.

Application: Ambient and source emissions

The Dekati® PM10 impactor fullfills all requirements set in the ISO 23210 standard - Stationary source emissions - Determination of PM10/PM2,5 mass concentration in flu gas. More information on this can be downloaded here

M100 and M110 MOUDI™ IMPACTORS are precision cascade impactors with sharp cut-size and low internal-loss characteristics. They are members of the MOUDI™ family of precision, high-accuracy impactors from MSP featuring:

• 30 L/min sampling flow rate
• 37mm or 47mm collecting substrates
• Micro-orifice nozzles to minimize pressure drop, particle bounce, and re-entrainment

The Model 100 has 8 impaction stages and cut-size diameters from 0.18 µm to 18 µm. The Model 110 has 10 impaction stages and cut-size diameters from 0.056 µm to 18 µm. They are available with stage rotation (M100-R or M110-R) or without (M100-NR and M110-NR). Stage rotation allows particle deposit on the impaction plate to spread out over a circular area to form a nearly uniform layer.

The M120, M122, M125 Moudi-II™ and NanoMoudi-II™ IMPACTORS are 2nd generation Micro-Orifice, Uniform-Deposit Impactors

The MOUDI™ impactors are noted for their superior aerodynamic design, sharp cut-size, and low particle loss characteristics. Up to 2000 precision micro-orifice nozzles are used to reduce pressure drop, jet velocity, particle bounce, and re-entrainment. Individual stepper motors in the MOUDI-II impactors rotate internal impaction plates to spread out the particle deposit into a nearly uniform layer within a 25-mm-diameter circular area. Non-rotating versions of the impactors are also available.

Sampling flow rates are 30 L/min for the M120 and M122 and 10 L/min for the M125. The impactors are designed to collect size-fractionated particle samples in 4 equal geometrical intervals per decade of particle size for mass or chemical analyses.

The cut-size diameters are: 10, 18, 32, 56, 100, 180, 320, 560, 1000, 1800, 3200, 5600, and 10000 nm. (Model 120R shown for purposes of illustration.)

The M128, M129, M130, M131 are HIGH FLOW IMPACTORS (HFI™) with a sampling flow rate of 100 L/min. They are available with 3, 4, 5, and 6 impaction stages plus a final filter. Their high sampling flow rate makes them ideal for sampling particles at low concentrations or for obtaining samples in a short sampling time duration.

The M240 is a Personal Micro-environmental Aerosol Speciation Sampler (PMASS™). It is a compact sampler with a miniaturized, sharp-cut cyclone inlet and two parallel collection channels. Each channel accommodates a denuder and two tandem filters for complete, artifact-free evaluation of the chemical composition of particles below 2.5 µm diameter. The PMASS™ is light and small enough to be worn by a person. Field tests yield results equivalent to that of conventional samplers. The device may also be used with a desktop sampling station for sampling in a microenvironment.

Applications:

• Evaluation of personal exposures to PM2.5 mass, nitrates, sulfates, organic and elemental carbon.
• Evaluation of personal exposure to metal aerosols
• Studies of personal exposure in various environments.
• Personal sampling and stationary Micro-environmental sampling.

is a 10 L/min sampler with an omnidirectional inlet, a single 2.5 µm or 10 µm impactor stage followed by a final filter to collect PM2.5 or PM10 particles for gravimetric and/or chemical analyses. It has a quiet sampling pump, a multi-day timer permitting up to 14 programmable starts and stops. It is intended for micro-environmental monitorin g of PM2.5 or PM10 particles.

The M310 UNIVERSAL AIR SAMPLER (UAS™) is a 300 L/min air sampler for PM2.5, PM10, or dichotomous sampling. It is comprised of a multi-nozzle virtual impactor for size separation at 2.5 and 10 µm. Its modular design permits PM2.5, PM10, or dichotomous sampling. It also includes a PUF sampler for collecting volatile organic compounds (VOC). A programmable solid-state timer is included for multiple start/stop operations.