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Sensors & Probes

PU Mini

1/2" PU Mini sound intensity probe

The PU Mini, a miniaturized 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 visualize & localize your sound sources.


  • 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

Thorough sound field analysis with high spatial resolution

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 behavior 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.

Sound intensity probe with two sensors embedded in one probe

The PU Probe, a sound intensity probe is the combination of two sensors: a traditional microphone and a Microflown. The working principle allows the operation of the probe in-situ in real operating conditions without the need for special acoustically treated environment. Furthermore, the sensor is applicable in wide range of scenarios like reverberation conditions, closed cavities like for example, car interiors, to carry out measurements to study the sound field, localize the sound sources or the contribution of sound sources to a particular position i.e. sound source ranking.


Sensor performance Sound Pressure | Particle Velocity
Sensitivity 65 mV/Pa | 30 V/(m/s)
Frequency Range (±1 dB) 40 - 8000 Hz
Frequency Range (±2 dB) 20 - 10000 Hz
Maximum Level 112 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)
Environmental Sound Pressure | Particle Velocity
Temperature -20 to 63 °C
Temperature Coefficient 0.067 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 airflow 1.5 m/s
Physical dimensions
Connector type 4 pin LEMO
Weight 18.8 g
Diameter 12.7 mm (1/2 inch)
Length 40.7 mm
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