Product Overview
The BBUA-H50K series consists of miniature MEMS hydrophones for underwater acoustic reception, available in 20 Hz–20 kHz and 1–50 kHz versions. Both variants provide omnidirectional response, integrate a 40 dB amplifier, and offer a ±1000 Pa dynamic range in a compact package suitable for space-constrained underwater systems and multi-sensor arrays.
Typical applications include pipeline leak detection, waterway monitoring, underwater communication, geological prospecting, marine fishery systems, and general underwater acoustic monitoring.
Available Variants
| Model | Frequency Range | Sound Pressure Sensitivity | Normal Operating Depth | Dimensions | Weight |
|---|---|---|---|---|---|
| BBUA-H20K | 20 Hz–20 kHz | -180 ±3 dB re 1 V/µPa | <50 m | Φ15 × 32 mm | Approx. 4 g, excluding cable |
| BBUA-H50K | 1–50 kHz | -185 ±3 dB re 1 V/µPa | <100 m | Φ15 × 32 mm | Approx. 6 g, excluding cable |
Common Features
- Miniature MEMS hydrophone
- Omnidirectional response
- Dynamic range: ±1000 Pa
- Built-in amplifier gain: 40 dB
- Output swing: 1 Vppk
- Current consumption: 4 mA
- Insulation resistance: >50 GΩ
- Compact Φ15 × 32 mm package
- Suitable for arrays and compact underwater systems
Typical Applications
- Pipeline leak detection
- Waterway monitoring
- Underwater communication
- Geological prospecting
- Marine fishery systems
- Underwater acoustic monitoring
- Hydrophone arrays
- Ultrasonic detection
Technical Specifications
| Parameter | BBUA-H20K | BBUA-H50K |
|---|---|---|
| Frequency Range | 20 Hz–20 kHz | 1–50 kHz |
| Dynamic Range | ±1000 Pa | ±1000 Pa |
| Sound Pressure Sensitivity | -180 ±3 dB re 1 V/µPa | -185 ±3 dB re 1 V/µPa |
| Nominal Voltage Sensitivity | 1 mV/Pa | Not specified in source |
| Sensitivity Change with Temperature | 10 ppm/°C | <0.1%/°C |
| Nonlinearity | <1% | <1% |
| Noise Resolution at 1 kHz | 60 dB re µPa/√Hz | Approx. 60 dB re µPa/√Hz |
| Internal Amplifier Gain | 40 dB | 40 dB |
| Output Swing | 1 Vppk | 1 Vppk |
| Current Consumption | 4 mA | 4 mA |
| Insulation Resistance | >50 GΩ | >50 GΩ |
| Directionality | Omnidirectional | Omnidirectional |
| Normal Operating Depth | <50 m | <100 m |
| Operating Temperature | -40–85 °C | -40–80 °C |
| Dimensions | Φ15 × 32 mm | Φ15 × 32 mm |
| Weight | Approx. 4 g, excluding cable | Approx. 6 g, excluding cable |
Power Supply and Maximum Ratings
| Parameter | BBUA-H20K | BBUA-H50K |
|---|---|---|
| Test Supply Voltage | 8 V | 8 V |
| Supply Range | Not explicitly specified in source | 5–15 V |
| Maximum Supply Voltage | ±20 V | 16 V |
| Storage Temperature | -50–100 °C | -50–80 °C |
| Maximum Operation Depth | 100 m | 100 m |
| Survival Depth | 400 m | 400 m |
Pin Configuration
BBUA-H20K
| Pin | Color | Function |
|---|---|---|
| Pin 1 | Red | Vdd |
| Pin 2 | Black | GND |
| Pin 3 | Yellow | Output |
BBUA-H50K
| Pin | Color | Function |
|---|---|---|
| Pin 1 | Yellow | AC Signal Output |
| Pin 2 | Red | DC Power Supply |
| Pin 3 | Black | Ground |
Stability Information
The BBUA-H50K source document additionally specifies:
- Sensitivity variation across 1–50 kHz is less than ±3 dB
- Sensitivity variation between units is less than ±3 dB
- Temperature effect on sensitivity is less than 0.1%/°C from -40 to 80 °C
- Sensitivity variation is less than ±1 dB over 0–100 m water depth
Selection Guide
- Choose BBUA-H20K when lower-frequency underwater acoustic coverage is required.
- Choose BBUA-H50K when a higher upper-frequency limit and deeper normal operating range are required.