Measurement acoustic transducer BBUA-MB

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Overview
The BBUA-MB series comprises configurable underwater transducers covering center frequencies from 90 to 500 kHz. Units are engineered for multibeam depth sounding, seafloor and terrain mapping, phased-array hydroacoustic systems and underwater target imaging. Acoustic and electrical characteristics vary by center frequency; specifications below are grouped per frequency.

Frequencies and operating configurations
Center frequency | Operating temperature | Pressure rating | Protection rating
90 kHz ±5% | -40 to +80°C | ≤0.3 MPa | IP68
150 kHz ±5% | -40 to +80°C | ≤1 MPa | IP68
200 kHz ±5% | -40 to +80°C | ≤1 MPa | IP68
300 kHz ±5% | -40 to +80°C | ≤1 MPa | IP68
400 kHz ±5% | -40 to +80°C | ≤1 MPa | IP68
500 kHz ±5% | -40 to +80°C | ≤1 MPa | IP68

Confirmed electrical configurations
Center frequency | Minimum impedance | Capacitance at 1 kHz | Peak voltage
90 kHz | 6,500 Ω ±20% | 1,500 pF ±20% | <2,100 Vpp
150 kHz | 8,500 Ω ±20% per element | 100 pF ±20% per element | <1,950 Vpp
300 kHz | 150 Ω ±20% | 2,800 pF ±20% | <950 Vpp
400 kHz | 60 Ω ±20% | 6,000 pF ±20% | <750 Vpp
500 kHz | 250 Ω ±20% | 1,800 pF ±20% | <750 Vpp

Confirmed acoustic data
Center frequency | Beam or range
90 kHz | 57.8° ±10% half-power beamwidth; 0.5 to 30 m reference range
150 kHz | 8.6° ±10% half-power beam angle
200 kHz | 0.6 to 120 m reference range

Housing materials
The documented housing materials for the 90 kHz configuration are ABS and PI.

Documented applications

• Multibeam depth sounding
• Underwater terrain and seafloor mapping
• Phased-array hydroacoustic systems
• Underwater target imaging

Technical specifications

• Model series: BBUA-MB
• Brand: Deep Minds Ultrasonic
• Center frequency range: 90 kHz ±5% to 500 kHz ±5% (available center frequencies: 90, 150, 200, 300, 400, 500 kHz)
• Operating temperature (all documented frequencies): -40 to +80°C
• Pressure rating: 90 kHz ≤0.3 MPa; 150/200/300/400/500 kHz ≤1 MPa
• Protection rating: IP68 for all documented configurations
• Minimum impedance by frequency: 90 kHz — 6,500 Ω ±20%; 150 kHz — 8,500 Ω ±20% per element; 300 kHz — 150 Ω ±20%; 400 kHz — 60 Ω ±20%; 500 kHz — 250 Ω ±20%
• Capacitance at 1 kHz by frequency: 90 kHz — 1,500 pF ±20%; 150 kHz — 100 pF ±20% per element; 300 kHz — 2,800 pF ±20%; 400 kHz — 6,000 pF ±20%; 500 kHz — 1,800 pF ±20%
• Peak voltage (Vpp) by frequency: 90 kHz <2,100 Vpp; 150 kHz <1,950 Vpp; 300 kHz <950 Vpp; 400 kHz <750 Vpp; 500 kHz <750 Vpp
• Acoustic beam / reference range: 90 kHz — 57.8° ±10% half-power beamwidth; reference range 0.5–30 m; 150 kHz — 8.6° ±10% half-power beam angle; 200 kHz — reference range 0.6–120 m
• Documented housing materials (90 kHz): ABS and PI
• Intended applications: multibeam depth sounding, underwater terrain and seafloor mapping, phased-array hydroacoustic systems, underwater target imaging