Level measurement ultrasonic transducer BBDM-34KR12M

for obstacle detectionmeasurement

Overview
The BBDM-34KR12M is an air-coupled ultrasonic transducer specified at a 34 kHz center frequency and a recommended measuring range of 0.5 to 12 m. Its listed applications include tank and vessel level measurement, ranging on industrial equipment, collision avoidance for vehicles and machinery, and security or area monitoring.

Primary configuration
The primary configuration combines an 8-degree half-power angle with a pressure rating of up to 3 kgf or 0.3 MPa. This pairing is relevant where the sensor must observe a defined target region while operating at the pressure stated for the installation.

Primary configuration specifications
Model: BBDM-34KR12M
Center frequency: 34 kHz +/-5%
Recommended range: 0.5-12 m
Minimum impedance: 700 ohm +/-20%
Capacitance: 5,400 pF +/-20% at 1 kHz
Operating voltage: Peak voltage below 1,500 Vpp
Operating temperature: -40 to +80 degrees C
Pressure rating: Up to 3 kgf or 0.3 MPa
Beam characteristic: -3 dB half-power angle: 8 degrees +/-10%
Housing material: PTFE
Mounting: Refer to the product dimensional drawing
Protection rating: IP68
Weight: 1,190 g +/-5%

Two listed acoustic and pressure configurations
The source lists two configurations at the same nominal center frequency. They must be treated as distinct selections because the lower range limit, beam angle and pressure rating change together.
Recommended range | -3 dB half-power angle | Pressure rating
0.45-12 m | 8.9 degrees +/-10% | Up to 10 kgf or 1 MPa
0.5-12 m | 8 degrees +/-10% | Up to 3 kgf or 0.3 MPa

Mounting around the acoustic path
Keep the expected target within the acoustic axis and account for the 0.5 m lower limit of the primary configuration. Tank fittings, vessel internals, guards and machine structures should not intrude into the intended field. Target size, surface condition and angle also need to be reviewed because they influence the returning echo.

Material and circuit checks before integration
The specified housing material is PTFE. Check it against the process medium and temperature range rather than selecting the unit from pressure and distance alone. The receive and drive circuit must also account for the 700-ohm minimum impedance, 5,400 pF capacitance and peak-voltage limit below 1,500 Vpp. Use the product dimensional drawing to verify the available mounting space and interface.

Caractéristiques / spécifications techniques

• Model: BBDM-34KR12M
• Center frequency: 34 kHz +/-5%
• Recommended range (primary): 0.5-12 m
• Alternate recommended range: 0.45-12 m
• Minimum impedance: 700 ohm +/-20%
• Capacitance: 5,400 pF +/-20% at 1 kHz
• Operating voltage: Peak voltage below 1,500 Vpp
• Operating temperature: -40 to +80 degrees C
• Pressure rating (primary): Up to 3 kgf (0.3 MPa)
• Pressure rating (alternate): Up to 10 kgf (1 MPa)
• Beam characteristic: -3 dB half-power angle: 8 degrees +/-10% (primary); 8.9 degrees +/-10% (alternate)
• Housing material: PTFE
• Mounting: Refer to the product dimensional drawing
• Protection rating: IP68
• Weight: 1,190 g +/-5%