Long acoustic paths in industrial environments
The BBDM-16KR50M is an air-coupled ultrasonic transducer for applications that require a long measurement path. Its 16 kHz center frequency and reference range of 1.8 to 50 m make it a candidate for large-tank level monitoring, industrial distance measurement, collision avoidance, area monitoring and long-range target detection.
The specified -3 dB half-power angle is 13 degrees +/-10%. This beam characteristic, the target dimensions and the mounting axis must be assessed together, particularly at the far end of the intended range.
Technical specifications
| Parameter | Specification |
|---|---|
| Model | BBDM-16KR50M |
| Center frequency | 16 kHz +/-5% |
| Recommended range | 1.8-50 m |
| Minimum impedance | 790 ohm +/-20% |
| Capacitance | 12,700 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 |
| Beam characteristic | -3 dB half-power angle: 13 degrees +/-10% |
| Protection rating | IP68 |
| Weight | 2,400 g +/-5% with 10 m +/-0.3 m cable |
Mounting configurations
| Configuration | Mounting interfaces |
|---|---|
| Top and bottom mounting | M32 x 1.5 top thread and M108 x 2 bottom thread |
| Bottom mounting | M108 x 2 bottom thread |
The 2.4 kg assembly and 10 m cable should be included in the mechanical support and cable-routing plan. Select the mounting version from the actual dimensional drawing rather than from the thread designation alone.
Range validation and selection
The 50 m value is a reference range, not a guaranteed result for every surface or atmosphere. Confirm the target size, orientation and reflectivity, air temperature, required dead zone, installation alignment and possible obstructions. The drive and receive electronics must also accommodate the stated impedance, capacitance and peak-voltage limit.