Acoustic ultrasonic transducer BBDM-75KR3M

non-contactfor obstacle detectionfor level measurement

Overview
The BBDM-75KR3M is an air ultrasonic distance transducer specified for short-range measurement. Center frequency is 75 kHz (±5%) with a recommended reference range of 0.3–3 m, a half-power beam angle of 10.8° (±10%) and IP68 protection. The device is designed for industrial automation tasks including proximity detection, short-range positioning, counting/target detection and compact level measurement. Operating temperature range: -40 to +80 °C.

Electrical and mechanical specifications
Model | BBDM-75KR3M
Center frequency | 75 kHz ±5%
Recommended range | 0.3 to 3 m
Minimum impedance | 200 Ω ±20%
Capacitance | 1,000 pF ±20% at 1 kHz
Operating voltage | Peak voltage below 1,500 Vpp
Operating temperature | -40 to +80 °C
Pressure rating | Up to 3 kgf or 0.3 MPa
Half-power beam angle at -3 dB | 10.8° ±10%
Top mounting thread | M30 × 1.5
Protection rating | IP68
Weight | 60 g ±5%
Cable length | 20 cm

Typical applications

• Automation proximity detection
• Short-range positioning
• Counting and target detection
• Compact level measurement

Selection and configuration
Define the operating medium and temperature, measuring distance, target size and surface condition, mounting space and interface dimensions, and required pressure/protection level. Specify drive and receive electronics, cable routing and connection method for equipment integration. Confirm impedance and capacitance compatibility with the chosen driver.

Key features / technical highlights

• Model: BBDM-75KR3M
• Center frequency: 75 kHz ±5%
• Reference sensing range: 0.3–3 m
• Half-power beam angle (-3 dB): 10.8° ±10%
• Minimum impedance: 200 Ω ±20%
• Capacitance: 1,000 pF ±20% at 1 kHz
• Operating voltage: peak < 1,500 Vpp
• Operating temperature: -40 to +80 °C
• Protection: IP68, pressure rating up to 3 kgf / 0.3 MPa
• Top mounting thread: M30 × 1.5, weight ~60 g, cable length 20 cm