Ultrasonic analysis of liquid concentration and composition
The BBID-C series covers center frequencies from 65 kHz to 2.1 MHz for battery electrolyte concentration, urea solution measurement, industrial liquid composition analysis, and sound-velocity or density measurement. The available frequency variants differ in electrical matching, operating temperature, pressure capability, housing material and acoustic characteristics.
Frequency and electrical configurations
| Center frequency | Minimum impedance | Capacitance at 1 kHz | Peak operating voltage | Operating temperature | Pressure rating | Protection rating |
|---|---|---|---|---|---|---|
| 65 kHz ±5% | 17,000 Ω ±20% | 450 pF ±20% | <1,000 Vpp | -40 to +80°C | ≤3 MPa | IP68 |
| 100 kHz ±5% | 8,000 Ω ±20% | 450 pF ±20% | <1,000 Vpp | -40 to +80°C | ≤3 MPa | IP68 |
| 200 kHz ±5% | 220 Ω ±20% | 800 pF ±20% | <300 Vpp | -10 to +50°C | 3 MPa | IP68 |
| 500 kHz ±5% | 85 Ω ±20% | 1,900 pF ±20% | <600 Vpp | -40 to +80°C | ≤1 MPa | IP68 |
| 1 MHz ±5% | 2,400 Ω ±20% | 800 pF ±20% | <300 Vpp | -40 to +80°C | ≤1 MPa | IP68 |
| 1.2 MHz ±5% | 40 Ω ±20% | 2,000 pF ±20% | <300 Vpp | -40 to +80°C | ≤1 MPa | IP68 |
| 2 MHz ±5% | 40 Ω ±20% | 1,600 pF ±20% | <150 Vpp | -40 to +100°C | ≤1 MPa | IP68 |
| 2.1 MHz ±5% | 13 Ω ±20% | 2,300 pF ±20% | <150 Vpp | -20 to +80°C | ≤1 MPa | IP68 |
Confirmed acoustic and material options
| Frequency | Confirmed option |
|---|---|
| 65 kHz | Stainless-steel housing |
| 100 kHz | Stainless-steel housing |
| 200 kHz | Titanium-alloy housing; stainless-steel option rated -40 to +80°C and up to 3 MPa |
| 500 kHz | 5° ±10% half-power angle; 0.3 to 30 m reference range; 1 MPa and 3 MPa pressure options |
| 1 MHz | 9° ±10% half-power angle; PTFE (-40 to +80°C), 304 stainless steel (-40 to +100°C), and 304+PTFE (-40 to +80°C) housing options |
| 1.2 MHz | 1.1° ±10% half-power angle; titanium-alloy housing |
| 2 MHz | 304 stainless-steel housing |
| 2.1 MHz | 316 stainless-steel housing |
Applications and selection
- Battery electrolyte concentration measurement
- Urea solution measurement
- Industrial liquid composition analysis
- Sound-velocity and density measurement
Frequency, electrical matching, temperature range, pressure rating, acoustic path and wetted material should be selected as one compatible configuration for the target liquid and instrument geometry.