Level and distance sensing across a 0.5-12 m reference span
The BBDM-36KR12M is a 36 kHz air ultrasonic transducer specified for a reference range of 0.5 to 12 m. Its documented uses include level measurement in tanks and vessels, ranging on industrial equipment, collision avoidance for vehicles and machinery, and security or area monitoring.
Selection should begin with the required distance and target, then account for the available mounting envelope and the operating environment. The reference range describes the product specification; performance in the final assembly still needs to be checked with the actual target and electronics.
Acoustic, electrical and mechanical data
| Parameter | Specification |
|---|---|
| Model | BBDM-36KR12M |
| Center frequency | 36 kHz +/-5% |
| Reference range | 0.5-12 m |
| Minimum impedance | 180 ohm +/-20% |
| Capacitance | 5,300 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: 10.1 degrees +/-10% |
| Housing material | Stainless steel |
| Mounting | Refer to the product dimensional drawing |
| Protection rating | IP68 |
| Weight | 2,840 g +/-5% |
| Cable length | 10 m +/-0.3 m |
Relate the beamwidth to the target zone
The stated -3 dB half-power angle is 10.1 degrees +/-10%. In a vessel, check whether the neck, ladders, pipes or other internals may enter the acoustic field between 0.5 and 12 m. For machinery ranging or collision avoidance, evaluate the target size, surface condition and orientation throughout its expected movement.
Security and area-monitoring layouts require the same review of the acoustic path. The transducer position should provide a clear route to the intended reflecting surface without nearby structures creating competing echoes.
Account for the cable, load and operating limits
The stated 2,840 g +/-5% weight and 10 m +/-0.3 m cable length should be included in the support and routing design. The installation also needs to remain within the pressure rating of 3 kgf or 0.3 MPa, the -40 to +80 degrees C operating range and the IP68 protection specification.
The drive and receive stages must suit the 180 ohm minimum impedance and 5,300 pF capacitance at 1 kHz. Peak excitation must stay below 1,500 Vpp, while the cable and connection method should be coordinated with the equipment interface.
Information for configuration review
- Operating medium, temperature and actual pressure
- Required measurement interval and closest target
- Target dimensions, surface and orientation
- Mounting space and interface dimensions
- Mechanical support for the transducer and cable
- Drive/receive electronics and connection method