Ultrasonic switching for liquid level detection
The BBDM-3M-LS is a 3 MHz ultrasonic liquid level switch transducer for discrete liquid-level functions. Its applications include high and low level alarms, liquid presence or absence detection, pump protection and level control in industrial equipment.
Electrical and operating specifications
| Parameter | Specification |
|---|---|
| Model | BBDM-3M-LS |
| Center frequency | 3 MHz ±5% |
| Minimum impedance | 450 Ω ±20% |
| Capacitance | 520 pF ±20% at 1 kHz |
| Operating voltage | Peak voltage <100 Vpp |
| Operating temperature | -20 to +60°C |
| Pressure rating | ≤10 kgf or 1 MPa |
| Protection rating | IP68 |
Applications
- High and low liquid-level alarms in vessels
- Liquid presence or absence detection
- Pump protection
- Level control in industrial equipment
Selection and electrical integration
Selection should account for the operating medium and temperature, required measuring distance or acoustic path, target size and surface condition, available installation space, operating pressure, ingress protection, and the drive and receive electronics.
The interface electronics should be matched to the specified minimum impedance, capacitance and peak operating voltage.