HNA-series Needle Hydrophone
The HNA model was designed to measure HIFU acoustic fields, suitable to measure multiple bursts of high pressure.
- Piezoceramic sensing element
- Needle shape with low reflection profile
- Encased in metallic coating to minimize cavitation damage
- Flat frequency response
- Various apertures available
| HNA-0400 | |
|---|---|
| Frequency range (±6dB) | 1-10 MHz |
| * EOC Nominal Sensitivity [nV/Pa] | 70 |
| * EOC Nom. Sens. [dB re 1V/uPa] | -263 |
| Effective Diameter | 400 μm |
| Capacitance | 80pF |
| Max. Operating Temperature | 50 °C |
* EOC ("end of cable") is the open-circuit output sensitivity of the hydrophone. Calibration with an amplifier can be determined from the gain and input impedance of the amplifier.
Provided with traceable calibration 1-20 MHz at 50 KHz intervals. For other calibrations available visit our web site.
The HNA hydrophone can withstand very high pressures (see reverse) but damage is caused by inertial cavitation and not incident field pressure per se. The same incident pressure may be safe or result in cavitation depending on water purity, gas content, temperature, agitation, and many other factors. The user is advised to watch for and avoid exposing this device to inertial cavitation.
Specifications are subject to change without notice.
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