Needle Hydrophone NH0200,0.2mm PVDF Probe for Medical Ultrasound Calibration
Mode：NH0200
Type:QA-Instruments
Contact： ken@hkmedqc.com
Precision Acoustics (PA) NH series needle hydrophones are high-performance PVDF-based probes designed for acoustic pressure measurement in medical ultrasound fields. With probe diameters ranging from 0.2mm to 4.0mm, they offer exceptional spatial resolution and minimal perturbation to the ultrasound beam, making them ideal for both basic calibration and advanced R&D applications.
The hydrophones feature a flat frequency response across a wide bandwidth, ensuring accurate measurements from low-frequency therapeutic ultrasound to high-frequency diagnostic imaging systems. Each unit is calibrated at the UK’s National Physical Laboratory (NPL), providing traceable accuracy that meets the strict requirements of IEC 62127-1, NEMA UD-3, and FDA 510(k) regulations.
Specifications of the 0.2 mm needle hydrophone system.
The 0.2 mm needle hydrophone is a popular general-purpose measurement device that offers a good compromise between sensitivity and directivity, suitable for a wide range of frequency applications from 1.0 to 40 MHz.
The 0.2 mm needle hydrophone is a general-purpose hydrophone that offers a good compromise between sensitivity, frequency response, directional response, dynamic range, and noise equivalent pressure, making it suitable for measurements in the 1 MHz to 40 MHz range. Its larger active area enables measurement signals of approximately 1 kPa. However, the larger sensor area results in a more directional response pattern, particularly at higher frequencies.
PA NH0200 Needle Hydrophone, 0.2 mm Needle Hydrophone Technical Specifications:
| Parameter | Specification |
| Output Impedance | 13pF ±2pF |
| Typical Probe Sensitivity | When measured at the output of a properly terminated HP1 underwater preamplifier, the average value in the 2–12 MHz range is 55 nV/Pa (equivalent to -265.2 dB re 1 V/μPa) |
| Sensitivity Tolerance | Sensitivity variation between individual probes is approximately ±3 dB |
| Typical Frequency Response | Flat (±2 dB): 5 to 25 MHz Flat (±4 dB): 1 to 35 MHz Minimum calibration frequency: 100 kHz |
| Sensor Material | 9 μm thick gold-electroded polyvinylidene fluoride (PVdF) film |
| Sensor Dimensions | 0.2 mm diameter |
PA NH0200 pin-type hydrophone, real photo of 0.2mm pin hydrophone：
