Immersible ultrasonic transducer BBID-C

high-frequencymeasurement

Overview
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. 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

• Battery electrolyte concentration measurement
• Urea solution measurement
• Industrial liquid composition analysis
• Sound-velocity and density measurement

Technical specifications

• Series: BBID-C
• Center frequency range: 65 kHz to 2.1 MHz (variants at 65 kHz, 100 kHz, 200 kHz, 500 kHz, 1 MHz, 1.2 MHz, 2 MHz, 2.1 MHz)
• Minimum impedance: ranges from 13 Ω to 17,000 Ω depending on frequency
• Capacitance at 1 kHz: from 450 pF up to 2,300 pF (±20% depending on variant)
• Peak operating voltage: variant-dependent, typical values <150 Vpp to <1,000 Vpp
• Operating temperature ranges: variants rated from as low as -40°C up to +100°C (specific limits depend on frequency and housing)
• Pressure rating: variants rated up to 3 MPa (many variants ≤1 MPa; some 65/100 kHz up to ≤3 MPa)
• Protection rating: IP68 for all listed variants
• Housing / wetted material options: stainless steel (304, 316), titanium-alloy, PTFE, combinations (304+PTFE)
• Acoustic characteristics: half-power angles and reference ranges vary by frequency (examples: 5° ±10% at 500 kHz, 9° ±10% at 1 MHz, 1.1° ±10% at 1.2 MHz)
• Typical applications: liquid concentration/composition analysis, battery electrolyte and urea measurements, sound velocity and density sensing
• Selection note: 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