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welas® digital 2000 H

With heating regulation up to 250 °C for welas® aerosol sensors

•    Measuring range of 0.2 to 100 µm (4 measuring ranges selectable in one device)
•    Up to four measuring ranges in only one device:
      -   0,2 µm – 10 µm
      -   0,3 µm – 17 µm
      -   0,6 µm – 40 µm
      -   2 µm – 100 µm (additionally for sensors 2300 and 2500)
•    Up to 128 size channels per measuring range
•    Concentration range of 1 particle/cm3 to 106 particles/cm3
•    Calibration curves for different refractive indices
•    Very high and reproducible counting efficiency rate starting at 0.2 µm (see Graph 2)
•    High temporal resolution down to 10 ms
•    Optical fibre technology
•    Measurement in potentially explosive environment
•    Long service life of the light source of 2000 h
•    Extensive PDControl and FTControl software
•    Simple operation
•    Calibration, cleaning and lamp replacement can all be performed independently by the customer
•    Low maintenance
•    Reliable function
•    Reduces your operating expenses

Description

Depending on the composition of the aerosol to be measured, i.e. the carrier gas component and the particle material, pressure and temperature changes in the carrier gas can significantly influence the particle size distribution, e.g. due to condensation or evaporation.

For this reason, the welas® aerosol sensors welas® 2070 H, HP, 2100 H, HP, 2200 H, HP, 2300 H, HP and welas® 2500 H, HP are equipped with a heatable and, as required, pressure-tight cuvette to ensure isobaric and isothermal sampling into the sensor’s measurement volume.

The welas® digital 2000 H model variant also offers heating regulation for temperatures up to 250 °C for the aerosol sensors with heatable cuvette.

The welas® digital is usually calibrated for the operating volume flow. In the welas® digital 2000 H version, regulation of the sampling volume flow is performed independently by the customer taking the temperature and pressure into consideration.

Datasheet

Interfaces

USB
Measurement range (size)

0.2 µm – 10 µm,
0.3 µm – 17 µm,
0.6 µm – 40 µm,
2 µm – 100 µm
Size channels

up to 64/decade
Measuring principle

Optical light-scattering
Measurement range (number CN)

< 1 • 106 particles/cm3
Thermodynamic conditions

≤ 250°C, -100 – 50 mbar
Volume flow

5 l/min
Data acquisition

20 MHz processor, 256 raw data channels, digital
Light source

Xenon arc lamp 35 W
User interface

Laptop
Power supply

115/230 V, 50/60 Hz
Housing

Table housing, optionally with mounting brackets for rack-mounting
Dimensions

185 • 450 • 315 mm (H • W • D) (19")
Weight

approx. 18 kg (control unit), approx. 2.8 kg (sensor)
Software

PDControl, FTControl
Installation conditions

+5 – +40 °C (control unit)

Benefits

•    Measuring range of 0.2 to 100 µm (4 measuring ranges selectable in one device)
•    Up to four measuring ranges in only one device:
      -   0,2 µm – 10 µm
      -   0,3 µm – 17 µm
      -   0,6 µm – 40 µm
      -   2 µm – 100 µm (additionally for sensors 2300 and 2500)
•    Up to 128 size channels per measuring range
•    Concentration range of 1 particle/cm3 to 106 particles/cm3
•    Calibration curves for different refractive indices
•    Very high and reproducible counting efficiency rate starting at 0.2 µm (see Graph 2)
•    High temporal resolution down to 10 ms
•    Optical fibre technology
•    Measurement in potentially explosive environment
•    Long service life of the light source of 2000 h
•    Extensive PDControl and FTControl software
•    Simple operation
•    Calibration, cleaning and lamp replacement can all be performed independently by the customer
•    Low maintenance
•    Reliable function
•    Reduces your operating expenses

Applications

•    Determination of the separation efficiency of car interior filters, engine air filters, room air filters, compressed air filters, vacuum cleaner filters, cleanable filters, electrostatic precipitators, oil separators, cooling lubricant separators, wet scrubbers, cyclones and other separators
•    Isothermal and isobaric particle size and quantitative determination, for instance in the automobile, chemical, pharmaceutical and food industries
•    Analysis of fast, transient processes
•    Inspection of smoke detectors
•    Particle formation for cloud formation
•    Emission measurements
•    Immission measurements
•    Breathing function: Inhalation / Exhalation (Particle size and number)

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