HNP-series Needle Hydrophone

The HNP needle hydrophone is the de facto standard for doppler mode measurements offering a flat response and wide directivity.

Key Features and Benefits
  • Piezopolymer sensing element
  • Needle shape with low reflection profile
  • Flat and wide frequency response
  • Various apertures available
The HNP Series needle hydrophones are excellent sensors for laboratory use in ultrasonic field mapping, with pinpoint access and good spatial resolution. While they have lower sensitivity than the HNC series, these hydrophones have a flatter response and better directivity.
HNP-0200 HNP-0400
Frequency range (±6dB) 1 to 20 MHz
* EOC Nominal Sensitivity [dB re 1V/μPa] -278 -266
* EOC Nominal Sensitivity [nV/Pa] 13 50
Acceptance angle (-6dB at 5 MHz) 110° 60°
Capacitance 70 pF
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.

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Related Resources

HNP Hydrophones Data Sheet

HNP Hydrophones Data Sheet

Get technical specs and information on the HNP Series Hydrophones by Onda.

Get Data Sheet

Hydrophone Handbook

Hydrophone Handbook

Learn how to select the best hydrophone for your application.

Read Handbook

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