PU Mini Particle Velocity Probe

The PU Mini, a miniaturised PU designed for all your diverse testing requirements and needs. Measure sound pressure and particle velocity physically at the same point in one compact probe designed specifically to handle measurements that demand high spatial resolution but has space limitations. Give your product an edge by unleashing the complete potential of a PU probe to visualise & localise your sound sources.



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The Microflown PU probe is able to simultaneously measure multiple acoustic properties such as sound pressure and particle velocity at any point of a sound field. As the only probe that can directly capture the complex acoustic behaviour present in the near field, detailed acoustic information becomes easily available to accurately find and quantify the acoustic output of multiple sound sources. The broadband response of the probe covers the complete frequency range from 20 Hz to 10000 Hz, without the need of introducing any assumptions or computational errors.

Features include:

  • Broad Band | 20Hz -10kHz
  • Compact design
  • High spatial resolution
  • Low susceptibility to P/I
  • Less dependent on environment conditions


  • Sensor array applications
  • Noise Source Identification
  • Configurable grids for Near Field Acoustic Camera
  • Range of Acoustic quantities: Sound Intensity, Sound Power, PVL measurements
Sensor performanceSound Pressure | Particle Velocity
Sensitivity65 mV/Pa | 30 V/(m/s)
Frequency Range (±1 dB)40 – 8000 Hz
Frequency Range (±2 dB)20 – 10000 Hz
Maximum Level112 dB | 125 dB
Noise floor (20 Hz – 2 kHz)22 dB(A) | 27 dB(A)
Noise floor (20 Hz – 10 kHz)27 dB(A) | 43 dB(A)
EnvironmentalSound Pressure | Particle Velocity
Temperature-20 to 63 °C
Temperature Coefficient0.067 dB/°C | 0.006 dB/°C
Influence of Humidity (30 – 90%)0.05 dB/%RH | 0.06 dB/%RH
Static Pressure Coefficient< 0.5 dB/kPA
Maximum airflow1.5 m/s
Physical dimensions
Connector type4 pin LEMO
Weight18.8 g
Diameter12.7 mm (1/2 inch)
Length40.7 mm

Microflown PU mini datasheet 




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