Immersible ultrasonic transducer BBDM-90KR4M

high-frequencymeasurementfor level measurement

Overview
The BBDM-90KR4M is a 90 kHz air ultrasonic distance transducer with a reference measuring range of 0.2 to 4 m. Its specified -3 dB half-power beam angle is 10.2° ±10%, supporting short-range detection within a defined acoustic field.

Applications

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

Technical specifications
Model: BBDM-90KR4M
Center frequency: 90 kHz ±5%
Recommended range: 0.2-4 m
Minimum impedance: 400 Ω ±20%
Capacitance: 1,400 pF ±20% at 1 kHz
Operating voltage: Peak voltage <1,200 Vpp
Operating temperature: -40 to +80°C
Pressure rating: ≤3 kgf or 0.3 MPa
Beamwidth: -3 dB half-power angle: 10.2° ±10%
Mounting: M38 × 1.5 thread
Protection rating: IP68
Weight: 122 g ±5% with 1 m cable

Mechanical and electrical integration
The standard mounting specification is an M38 × 1.5 thread. The stated weight is 122 g ±5% with a 1 m cable. Housing, mounting, cable and connection options are available for equipment integration.
For the interface electronics, the source specifies a minimum impedance of 400 Ω ±20%, capacitance of 1,400 pF ±20% at 1 kHz, and a peak operating voltage below 1,200 Vpp.

Technical specifications — summary

• Model: BBDM-90KR4M
• Center frequency: 90 kHz ±5%
• Recommended range: 0.2-4 m
• Beamwidth (-3 dB): 10.2° ±10%
• Minimum impedance: 400 Ω ±20%
• Capacitance: 1,400 pF ±20% at 1 kHz
• Operating voltage: Peak <1,200 Vpp
• Operating temperature: -40 to +80°C
• Pressure rating: ≤3 kgf / 0.3 MPa
• Mounting: M38 × 1.5 thread
• Protection: IP68
• Weight: 122 g ±5% (with 1 m cable)