Precipitation sensor PIP

Product overview
The PIP is an airborne-capable precipitation imaging probe that measures particle size and shape from 100 µm to 6.2 mm using a 64‑element optical array. It captures shadow slices of particles traversing a collimated laser and reconstructs images to identify particle presence, size and morphology.

Features and benefits

• Optimized for precipitation Measurement range and optics tuned for rain, snow, graupel and hail.
• High-quality images 64 photodetectors produce detailed shadow images for particle discrimination.
• Reduced artefacts Open-path design and anti‑shatter tips minimise particle fragmentation and false counts.
• Lifecycle Care Program Optional maintenance and support to preserve instrument integrity during airborne campaigns.

Technology

• Particle imaging Shadow images from particles crossing a collimated 660 nm laser are projected onto a linear 64‑element photodetector array.
• Individual time-resolved "slices" from the array are combined to reconstruct particle images for size and shape analysis.

Main applications

• Airborne cloud physics and microphysics research
• Validation of climate models and radiative forcing studies
• Weather modification and precipitation process research

PADS — Particle Analysis and Display System
The PIP supports optional PADS software providing a virtual instrument panel for control, real-time display and logging. Key functions include:

• Start and stop data recording and sampling
• Live particle image streaming
• Display of particle volume and number concentrations, Median Volume Diameter (MVD) and Effective Diameter (ED)
• Computed liquid water content (LWC)
• Instrument telemetry: laser current and electronics voltages
• Data playback for post‑flight analysis

Accessories

• PADS software bundle with laptop
• Data acquisition system and cabling

Technical information

• Technique: Optical array probe, 64 elements (62 sizing elements, end‑diode rejection)
• Measured particle size range: 100 µm – 6.2 mm
• Sample area: 260 mm x 6.2 mm (standard, no Korolev tips)
• Upper concentration range: 100 particles/cm³
• Air speed range: 10 – 200 m/s
• Number of size bins: 62
• Sampling frequency: Asynchronous, 0.1 – 10 Hz (typical 1 s)
• Laser: 660 nm
• Data interface: RS-422 (56,000 baud); high‑speed serial (4 x 10^6 baud, RS‑422 only)
• Weight: 9.5 kg (in DMT canister); 4.8 kg (without canister); 11.4 kg (with generic canister)
• Power: 28 VDC 3 A (system); 28 VDC 9 A (anti‑ice); optional AC supplies available
• Operating conditions: -40 °C to +40 °C; RH 0–100% non‑condensing; altitude 0–15 km (0–50,000 ft)