Four frequency configurations for sludge-level and interface measurement
The BBUA-M series provides 215 kHz, 300 kHz, 500 kHz and 650 kHz ultrasonic transducers for wastewater settling tanks, sludge thickeners, sludge-water interface monitoring and underwater distance measurement.
All configurations are rated for pressure up to 10 kgf or 1 MPa and carry IP68 protection. Electrical, acoustic and temperature parameters differ by frequency and must be selected as one complete row.
Electrical, acoustic and temperature configurations
| Center frequency | Minimum impedance | Capacitance | Peak voltage | Half-power angle at -3 dB | Operating temperature |
|---|---|---|---|---|---|
| 215 kHz ±5% | 100 Ω ±20% | 5,000 pF ±20% at 1 kHz | Below 1,500 Vpp | 8.7° ±10% | -40 to +80 °C |
| 300 kHz ±5% | 30 Ω ±20% | 7,500 pF ±20% at 1 kHz | Below 1,100 Vpp | 4.5° ±10% | -10 to +60 °C |
| 500 kHz ±5% | 150 Ω ±20% | 3,000 pF ±20% at 1 kHz | Below 600 Vpp | 7.5° ±10% | -40 to +80 °C |
| 650 kHz ±5% | 75 Ω ±20% | 1,900 pF ±20% at 1 kHz | Below 450 Vpp | 6.8° ±10% | -40 to +80 °C |
Reference-range configurations
| Center frequency | Reference range |
|---|---|
| 300 kHz ±5% | 0.4 to 50 m |
| 500 kHz ±5% | 0.3 to 30 m |
| 650 kHz ±5% | 0.3 to 25 m |
Housing materials
| Center frequency | Housing material |
|---|---|
| 215 kHz ±5% | Stainless steel + PI |
| 500 kHz ±5% | POM + PI |
Applications
- Wastewater settling tanks
- Sludge thickeners
- Sludge-water interface monitoring
- Underwater distance measurement