PRODUCT DATASHEET - MAG-3000
MONO-DISPERSE AEROSOL GENERATOR FOR THE
GENERATION OF ROUND AND UNCHARGED
PARTICLES
MAG-3000
The MAG 3000 operates based on the Sinclair-Lamer principle (1943).
It comprises a core source to generate condensation cores with a particle
diameter of approx. 85 nm, a vaporizer to vaporize the particle-forming
material, a reheating unit, and a condensation flue, in which the particleforming material condenses on the condensation core.
The condensation process here is heterogeneous. The centrepiece of the
MAG 3000 is the core source developed by Palas® with bypass technology.
No drying system.
BENEFITS
Particle size adjustable from approx. 0.2 to 8 µm for DEHS (other particle materials upon request)
Reproducible particle size adjustment
Minimal use of the saline solution, approx. 20 mL in 10 h
No drying system, no silica gel
Reliable bypass adjustments for evaporator and core source
Rapid particle size modification up to factor 2.5 within approx. 10 seconds using the bypass adjustments
Robust design, reliable function, high reproducibility
Low maintenance cost - Reduces your operating expenses
PRODUCT DATASHEET - MAG-3000
PRODUCT DATASHEET - MAG-3000
MONO-DISPERSE AEROSOL GENERATOR FOR THE
GENERATION OF ROUND AND UNCHARGED
PARTICLES
MAG-3000
TERMS AND DEFINITIONS
Basic characteristics of a test aerosol:
- Particle size distribution, particle shape and constant concentration over time
- Generation reproducibility
- This generator is based on the Sinclair-La Mer principle
THEORY
The Sincler-La Mer principle is used to generate an important concentration of mono-dispersed
test aerosol. The principle is based on the technique of heterogeneous condensation. Condensation nuclei are inserted in an atmosphere containing a vapour. This vapour condenses around the
nuclei thus forming droplets.
BASIC PRINCIPLE
The original Sinclair-La Mer generator consists mainly in a source of condensation nuclei and a
steam generator. The matters generated are generally DEHS, paraffin oil, or other EMERY. They
are vaporised in an evaporator. The thermodynamic process is performed by means of a steam
generator, a heater and controlled condensation. In this process, the initial condensation nuclei
are provided so that the vapour condenses homogeneously. Thus, a mono-dispersed aerosol is
generated by the ejection nozzle.
What determines the size of emitted particles? For a constant concentration and size of nuclei, the
higher the steam density, the greater the condensation around the nuclei.
APPLICATIONS
- Calibrating particle measurement devices
- Comparison of device parameters in relation to particle size:
- Inhalation tests
- Tracer particles/flow visualization
- Filter inspection
PRODUCT DATASHEET - MAG-3000
PRODUCT DATASHEET - MAG-3000
MONO-DISPERSE AEROSOL GENERATOR FOR THE
GENERATION OF ROUND AND UNCHARGED
PARTICLES
MAG-3000
DESCRIPTION OF THE MAG-3000
The «heart» of the Sinclair-La Mer generator is the source of the condensation nuclei.
A special nozzle nebulizes a small amount of liquid (about 0.6 g/h) in small droplets. A cyclone is operated with the nozzle. This has the effect of eliminating droplets > 1 µm.
The concentration of salt in suspension remains very stable in time, since only 10 ml of salt suspension
are nebulized for a 10 hours non-stop generator.
Instead of drying the salt nuclei with a silica gel column, a settling zone is in series with the cyclone.
This allows very small salt nuclei to be separated by diffusion and for condensation nuclei to dry in the
upstream process of the droplet creation. There is no sedimentation phenomenon of salt nuclei and
their generation remains constant over time.
Use of this type of generator is facilitated by the absence of any drying system.
HOW TO CREATE A CONSTANT AND REPRODUCIBLE
PARTICLE SIZE WITH MAG-3000
One needs a constant salt nuclei source, in terms of size
and concentration. Increasing the evaporator temperature, means a certain quantity of matter is vaporised.
Since the concentration of condensation nuclei remains
constant, a greater amount of condensation implies an
increase in the diameter of the particle.
In less than a second, the size of the generated particle
can be reproducibly adjusted using a «By Pass» valve.
This idea was developed by Vittorio Prodi in 1970. If the
«Bypass» valve is open, the amount of steam produced
per time unit decreases as the salt nuclei concentration
remains constant in the heater. Thus, particle size can
be reduced in a reproducible manner by a factor 2. Nitrogen is used as carrier gas to prevent droplet oxidation
at high temperatures.
PRODUCT DATASHEET - MAG-3000
PRODUCT DATASHEET - MAG-3000
MONO-DISPERSE AEROSOL GENERATOR FOR THE
GENERATION OF ROUND AND UNCHARGED
PARTICLES
MAG-3000
SPECIFICATIONS
FLOW RATE
3.5 - 4.5 lpm
POWER SUPPLY
115 - 230 V, 50 - 60 Hz
DIMENSIONS
610 mm • 300 mm • 300 mm
WEIGHT
approx. 22 kg
PARTICLE MATERIAL
DEHS, others on request
CARRIER/DISPERSION GAS
N2
MEAN PARTICLE DIAMETER (NUMBER)
0.2 - 8 µm (DEHS)
GEOMETRIC STANDARD DEVIATION (NUMBER)
MAXIMUM CONCENTRATION (NUMBER)
< 1.15
106 particles/cm3
Réf.F109 V1
DOMAINE TECHNOLOGIQUE - IMMEUBLE HERMES - 4, RUE RENE RAZEL 91 400 SACLAY - FRANCE l +33 (0)1 70 56 44 00
[email protected] l www.ecomesure.com