2.0mm Needle Hydrophone

This probe has outstanding sensitivity and is ideally suited to the measurement of lower frequency fields.



Although optimised for lower frequencies, these probes can be used for higher frequency measurements (particularly of very weak signals). In such situations the inherent directivity and spatial averaging characteristics of a 2mm aperture means that care should be taken in interpreting data.

All dimensions are in mm. All probes are hand made and as such there is always some variation between individual devices. Please contact us if the actual dimensions are critical to your work.

2mm hydrophone probe

Technical Specifications

Output Impedance: 27pF+/- 4pF
Typical Probe Sensitivity: 3.5V/MPa (equivalent to -229.1dB re 1V/uPa) averaged over the range 0.5-8MHz when measured at the output of a correctly terminated HP1 Submersible Preamplifier
Sensitivity Tolerance: Sensitivity variation between individual probes is approx. +/-3dB
Typical Frequency Response: Flat (+/-2dB): 400kHz to 6MHz
Flat (+/-4dB): 100kHz to 10MHz
Minimum calibration frequency 30kHz
Sensor Material: 28 micron thick gold electroded Polyvinylidene fluoride (PVdF) film
Sensor Dimension 2.0mm diameter disc

*Precision Acoustics reserves the right to change the specification without notice.

For further details contact one of our Applications Engineers on 01305 264669.

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