Immersible ultrasonic transducer BBDM-73KR3M

measurementfor level measurementfor obstacle detection

A 0.3-3 m window for short-range automation
The BBDM-73KR3M is a 73 kHz air ultrasonic distance transducer with a 0.3 to 3 m reference range. It is intended for automation proximity detection, short-range positioning, counting and target detection, and compact level measurement.
The specified -3 dB half-power angle is 11 degrees +/-10%. Range and beamwidth should be considered together when positioning the transducer around machine structures, guides, containers or other nearby surfaces.

Confirmed product data
Parameter — Specification
Model — BBDM-73KR3M
Center frequency — 73 kHz +/-5%
Reference range — 0.3-3 m
Minimum impedance — 500 ohm +/-20%
Capacitance — 700 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
Beamwidth — -3 dB half-power angle: 11 degrees +/-10%
Mounting — Refer to the product dimensional drawing
Protection rating — IP68
Weight — 68 g +/-5% with a 20 cm cable

Plan for moving and discrete targets
In proximity or counting equipment, verify the smallest target throughout its path rather than only at one fixed point. Size, surface texture and incidence angle affect the echo, while rails, guards and adjacent objects can contribute unwanted reflections within the 11-degree field.
For short-range positioning, the full intended movement should remain between the 0.3 m near limit and 3 m upper reference distance. In compact level measurement, check the container opening and internal fittings against the same acoustic geometry.

Define the electrical and installation interface
The front end should be designed for a minimum impedance of 500 ohm and a capacitance of 700 pF at 1 kHz. Peak excitation must stay below 1,500 Vpp. The specified weight includes a 20 cm cable; any alternative cable or connection arrangement should be confirmed for the selected configuration.
Operating conditions must remain within -40 to +80 degrees C and no more than 3 kgf or 0.3 MPa. The transducer is specified with IP68 protection.

Inputs needed for selection

• Detection distance and target travel
• Target size, surface texture and orientation
• Mounting envelope and interface dimensions
• Operating medium, temperature and pressure
• Drive and receive electronics
• Cable length and connection method

Caractéristiques / spécifications techniques

• Model: BBDM-73KR3M
• Center frequency: 73 kHz +/-5%
• Reference range: 0.3-3 m
• Minimum impedance: 500 ohm +/-20%
• Capacitance: 700 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
• Beamwidth: -3 dB half-power angle 11 degrees +/-10%
• Mounting: Refer to the product dimensional drawing
• Protection rating: IP68
• Weight: 68 g +/-5% with a 20 cm cable