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welas® digital 3000 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 up 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 3000 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 3000 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

Time resolution

≥ 10 ms

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), ca. 2.8 kg (per 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 up 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)