Measurement ultrasonic transducer BBND-PF

Overview
The BBND-PF series comprises ultrasonic transducers designed for pile integrity testing, internal concrete defect detection, foundation quality assessment and cross-hole ultrasonic testing. Available center frequencies are 65 kHz, 88 kHz and 90 kHz. All configurations operate from -40 to +80 °C and feature IP68 ingress protection. Electrical and pressure parameters vary by frequency and must be ordered as a matched set.

Electrical and pressure configurations
Center frequency | Minimum impedance | Capacitance | Peak voltage (Vpp) | Pressure rating
65 kHz ±5% | 950 Ω ±20% | 5,250 pF ±20% at 1 kHz | Below 1,000 Vpp | Up to 10 kgf or 1 MPa
88 kHz ±5% | 150 Ω ±20% | 2,000 pF ±20% at 1 kHz | Below 2,250 Vpp | Up to 10 kgf or 1 MPa
90 kHz ±5% | 450 Ω ±20% | 1,900 pF ±20% at 1 kHz | Below 2,250 Vpp | Up to 5 kgf or 0.5 MPa

Acoustic configurations
Center frequency | Bandwidth at -3 dB | Half-power angle at -3 dB
88 kHz ±5% | ±20% | 18° ±10%
90 kHz ±5% | ±10% | 18° ±10%
The housing material for the 90 kHz configuration is 304 stainless steel + PI.

Applications

• Pile integrity testing
• Internal concrete defect detection
• Foundation quality assessment
• Cross-hole ultrasonic testing

Technical specifications

• Series: BBND-PF
• Available center frequencies: 65 kHz ±5%, 88 kHz ±5%, 90 kHz ±5%
• Operating temperature range: -40 to +80 °C
• Ingress protection: IP68
• Electrical and pressure parameters differ by frequency and must be selected as one complete row
• See Electrical and pressure configurations block for impedance, capacitance, Vpp and pressure ratings
• Acoustic bandwidth and beam angle: see Acoustic configurations block
• Housing material (90 kHz): 304 stainless steel + PI