Level measurement ultrasonic transducer BBDM-35KR12M

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Overview
The BBDM-35KR12M is a 35 kHz air ultrasonic transducer specified for distance measurement from 0.45 to 12 m. It is designed for medium-range industrial sensing where beam control, environmental sealing and defined electrical characteristics are required. Performance within the reference range depends on target surface, alignment, mounting geometry and associated electronics.

Using the 10.4-degree beam in the installation
The -3 dB half-power angle is 10.4° ±10%. When planning installations, consider nearby vessel walls, fittings or machine structures that may intersect the acoustic field. Target size, surface condition and angular alignment directly affect returned signal amplitude and detection reliability. For collision-avoidance or moving targets, ensure the intended detection zone remains within the beam across the expected motion path.

Electrical and environmental matching
Design drive and receive circuitry for the minimum impedance of 180 Ω and capacitance of 4,500 pF ±20% at 1 kHz. Do not exceed the 1,500 Vpp excitation limit. Operate within the specified environmental limits: IP68 protection, pressure up to 1 MPa and temperature range −40 to +80 °C.

Applications

• Tank and vessel level measurement
• Industrial equipment ranging and positioning
• Collision avoidance and proximity sensing for machinery and vehicles
• Security and area monitoring

Technical specifications

• Model: BBDM-35KR12M
• Center frequency: 35 kHz ±5%
• Reference range: 0.45–12 m
• Minimum impedance: 180 Ω ±20%
• Capacitance: 4,500 pF ±20% at 1 kHz
• Operating voltage: Peak voltage below 1,500 Vpp
• Operating temperature: −40 to +80 °C
• Pressure rating: Up to 1 MPa
• Beamwidth: −3 dB half-power angle 10.4° ±10%
• Protection rating: IP68
• Weight: 410 g ±5% (with 5 cm cable)