NH2000 2.0mm Needle Hydrophone, Ultra-High Sensitivity PVDF Ultrasonic Hydrophone 0.1MHz-10MHz

Compliant with the IEC 62127-3 international standard, it covers a full frequency range of 0.1MHz~10MHz and is specially optimized for ultrasonic measurement scenarios below 2MHz. Equipped with a 2.0mm large-size sensor element, it delivers an ultra-high average sensitivity of 3.5 V/MPa (0.1MHz~10MHz), capable of capturing ultra-weak acoustic signals as low as 17 Pa, with unit sensitivity tolerance within ±3dB for excellent data consistency.
 

Lightweight (2.5g) and fully submersible, it withstands hydrostatic pressure up to 2m water depth and supports long-term underwater operation. It is widely used in low-frequency medical ultrasound calibration, low-power sound field testing, laboratory precision acoustic research, and industrial low-frequency ultrasonic detection.



Product feature:

1. Ultra-High Sensitivity for Ultra-Weak Signal: Average sensitivity of 3.5 V/MPa from 0.1MHz to 10MHz, supporting precise detection of ultra-weak acoustic signals as low as 17 Pa, ideal for low-frequency and low-power precision measurement.

2. Specialized Low-Frequency Optimization: Full frequency range of 0.1MHz~10MHz, specially optimized for frequencies below 2MHz, solving the low-precision defect of ordinary hydrophones in low-frequency testing.

3. Stable Accuracy & High Consistency: Sensitivity variation within ±3dB, calibrated by national metrology institutions with standardized measurement uncertainty, ensuring traceable and reliable test data.

4. Waterproof & Durable for Wide Application: Made of corrosion-resistant gold-plated, stainless steel and PTFE materials, fully submersible, withstands 2m water depth, and operates stably at 5℃~50℃.

5. Wide Dynamic Range & Easy Installation: Maximum safe mechanical pressure up to 10MPa, matched with standard 50Ω output impedance, featuring strong compatibility and simple system setup.

Item	Specification
Model Number	NH2000
Sensor Element Diameter	2.0 mm
Sensor Element Thickness	28 μm
Hydrophone Net Weight	2.5 g
Transduction Method	Piezoelectric Conversion
Sensor Material	Polyvinylidene Fluoride (PVDF)
Mean Sensitivity (0.1 MHz ~ 10 MHz)	3.5 V/MPa
Sensitivity Variation between Units	± 3 dB
Operating Frequency Band	0.1 MHz ~ 10 MHz
Optimized Frequency Range	Below 2 MHz
Measurement Uncertainty (0.1 MHz ~ 1 MHz)	9 %
Measurement Uncertainty (1 MHz ~ 8 MHz)	14 %
Measurement Uncertainty (9 MHz ~ 15 MHz)	18 %
Minimum Detectable Acoustic Pressure	17 Pa
Amplifier Saturation Pressure	200 kPa
Maximum Safe Mechanical Pressure	10 MPa
System Output Impedance	50 Ω
Operating / Storage Temperature	5 ℃ ~ 50 ℃
Critical Damage Temperature	Above 60 ℃
Sensitivity Temperature Drift	+0.6 % per ℃ temperature rise
Maximum Withstand Water Depth	2 m
Recommended Calibration Cycle	Full calibration every 12 months, monthly routine check
Execution Standard	IEC 62127-3
Installation Requirement	Needle tip facing directly to acoustic source

NH2000 2.0mm Ultrasonic Needle Hydrophone for Low-Frequency Testing 0.1MHz-10MHz real photo: