PCASP-100X

Passive Cavity Aerosol Spectrometer Probe

The PCASP-100X is an airborne optical spectrometer that measures aerosol particles in the 0.1 µm to 3 µm range.

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Get unmatched sensitivity and specificity in real-time measurements of aerosols.

Enable direct measurement of the air stream with the leading cannister-based aircraft instrument.

Power your research with elimination of dead-time losses, plus continuous monitoring of multiple housekeeping variables.

Get user-programmable sample rates, number of channels, and channel size thresholds.

Particle light-scattering

  • Optical bench collects light that is scattered by individual particles passing through a HeNe, 0.6328 µm laser beam.
  • An amplification system with three gain stages covers the full range of particle sizes.
Parameter Specification
Measured Parameters

Particle size (determined from particle light-scattering)
Ambient temperature
Standard and volumetric flows for sample and sheath air

Derived Parameters

Particle Concentration
Median Volume Diameter (MVD)
Effective Diameter (ED

Particle Size Range

0.1 – 3.0 µm

Maximum Count Rate

3,000 particles/sec

Counting Efficiency

50% at minimum threshold, increasing to 100% by the fourth size channel

Sampling Frequency

0.1 to 25 Hz, selectable

Flow Rate

Sample flow: 1 cc/sec
Sheath flow: 15 cc/sec

Air Speed Range

0 – 250 m/sec

Number of Size Bins

Standard is 30

Laser

HeNe multi-mode classical passive cavity, wavelength 0.6328 µm

Light Collection Angle

Nominally 35° – 120°

Data System Interface

RS-422, 34800 baud rate; USB

Power requirements

Probe: 115VAC or 230VAC, 50-60Hz, less than 120W; specify voltage when ordering
Anti-ice: 28 VDC, 215 W

Weight

40 lbs (18.2 kg)

Dimensions

40” long x 7” diameter (102 cm long x 18 cm diameter)

Operating Conditions

Temperature: -30 to +40 °C
Altitude: 0 to 30,000 ft (9.1 km)
Relative Humidity: 0 – 90% RH (non-condensing)

PADS software and laptop
Data Acquisition System
Aerosol Generator

Droplet offers a three-year service plan to ensure that your PCASP-100X continues to deliver high-quality data. This plan locks costs upfront at the time of funding application and covers annual calibration, alignment, cleaning, wear-item replacement, calibration documentation, and shipping. Specific services provided for the PCASP-100X include:

  • Shipping to and from Droplet facility for service
  • Incoming instrument evaluation and health check
  • Optics cleaning and alignment
  • O-ring replacement
  • Hardware replacement
  • Replace heat sink compound
  • Baseline voltages set and verified
  • Power supply evaluation
  • Flow measurement verification
  • Card edge connectors cleaning
  • Heater testing
  • Inlet jet alignment
  • Desiccant replacement
  • Calibration of instrument using Aerosol Generator and PSL’s
  • Canister test
  • Software, firmware, and antivirus update
  • 100% unit functionality test
  • Calibration data, Calibration Report, Certificate of Conformance provided

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Speak with one of our scientists or experts at Droplet Measurement Technologies today to discover solutions that can power your research.

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