Immersible ultrasonic transducer BBDM-68KR5M

high-frequencyfor obstacle detectionmeasurement

Overview
The BBDM-68KR5M is a 68 kHz air ultrasonic distance transducer for proximity detection and ranging with a reference range of 0.3-5 m, a -3 dB half-power angle of 8° ±10%, IP68 protection and a 5 m cable. It is intended for short-range sensing layouts in industrial automation and measurement applications.

Applications

• Automation proximity detection
• Short-range positioning and alignment
• Counting and target detection
• Compact level measurement in small vessels or tanks

Performance and usage notes
Echo performance depends on target size, surface finish, orientation and movement. Guards, rails or adjacent machine parts within the acoustic path can create unwanted echoes. For compact level measurement, the 0.3 m near limit and the 8° half-power angle determine the acoustic field relative to vessel openings and internal structures. Surface condition and incidence angle can reduce or alter the returned echo.

Interface and environmental requirements
The drive and receive circuitry must accommodate the specified minimum impedance of 250 Ω and capacitance of 2,500 pF at 1 kHz. Peak drive voltage must remain below <1,000 Vpp. The transducer is supplied with a 5 m cable. Operating temperature range: -40 to +80 °C. Maximum pressure: up to 3 kgf (0.3 MPa). Protection rating: IP68.

Technical specifications

• Model: BBDM-68KR5M
• Center frequency: 68 kHz ±5%
• Reference range: 0.3-5 m
• Beamwidth (-3 dB half-power angle): 8° ±10%
• Minimum impedance: 250 Ω ±20%
• Capacitance: 2,500 pF ±20% (at 1 kHz)
• Peak drive voltage: <1,000 Vpp
• Operating temperature: -40 to +80 °C
• Pressure rating: up to 3 kgf / 0.3 MPa
• Protection: IP68
• Weight: 160 g ±5% (with 5 m cable)