Non-contact ultrasonic transducer BBDM-70KR3M

for level measurementproximityfor obstacle detection

Product overview
The BBDM-70KR3M is an air ultrasonic distance transducer with a 70 kHz center frequency and a recommended measuring range of 0.3 to 3 m. The half-power beam angle is 11.4° at −3 dB (±10%). Designed for industrial short-range detection, it is suitable for proximity sensing, short-range positioning, counting/target detection and compact level measurement. Operating temperature: −40 to +80 °C. Protection rating: IP68.

Technical specifications (table)
Model — BBDM-70KR3M
Center frequency — 70 kHz ±5%
Recommended range — 0.3 to 3 m
Minimum impedance — 300 Ω ±20%
Capacitance — 1,400 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 / 0.3 MPa
Half-power beam angle at −3 dB — 11.4° ±10%
Top mounting thread — M30 × 1.5
Protection rating — IP68
Weight — 70 g ±5%
Cable length — 20 cm

Specified application areas

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

Selection and installation inputs
Specify the operating medium and temperature, required measuring distance or acoustic path, target size and surface condition, available mounting space and interface dimensions, operating pressure and required protection level. Also define the drive/receive electronics, cable type and connection method to ensure compatibility with the control equipment.

Technical characteristics

• Model: BBDM-70KR3M
• Center frequency: 70 kHz ±5%
• Recommended range: 0.3 to 3 m
• Minimum impedance: 300 Ω ±20%
• Capacitance: 1,400 pF ±20% at 1 kHz
• Operating voltage: Peak below 1,500 Vpp
• Operating temperature: −40 to +80 °C
• Pressure rating: Up to 3 kgf / 0.3 MPa
• Half-power beam angle at −3 dB: 11.4° ±10%
• Top mounting thread: M30 × 1.5
• Protection rating: IP68
• Weight: 70 g ±5%
• Cable length: 20 cm