NTS Ultrasonics
NTS Ultrasonics Pty Ltd

Remote Ultrasonic Pulser Preamplifiers

Driving ultrasonic signals through long cables can seriously degrade the signals: transmit pulses become flattened and wide; received signals can become corrupted by external noise and distorted by impedance mismatches. Remote ultrasonic pulser preamplifiers can be custom designed to correct these types of problems. Good quality preamplifiers and pulser/preamps improve signal quality in underwater UT and auto UT applications involving long cable runs. Our ultrasonic pulser/preamps work with standard ultrasonic flaw detectors as well as with our our ultrasonic pulser/receivers.

Preamplifiers with logarithmic compression can be used to compress the dynamic range of the RF signal, allowing the full dynamic range of the signal to be utilized.

Depending on ultrasonic frequency, coaxial cables can be "long" at 30 metres. Twisted pair cables are less ideal and can be "long" at 10 metres. In electrically noisy environments even shorter cables can benefit from the use of remote preamplifiers to boost the signal from the transducer. We have provided circuits that drive ultrasonic signals through coaxial cables in excess of 500 metres long, maintaining the quality of the signal.
NTS Ultrasonics Pty Ltd does not sell off the shelf preamplifiers. We prefer to learn from the client what the ultrasonic systems needs to achieve and to custom design a solution that optimized the whole signal chain from the transducer to the flaw detector.

We have many ultrasonic pulser preamp design options.
Very low noise ultrasonic preamplifiers (better than 1 nV/(sqrt Hz) input noise)
Connection to the main ultrasonics by single coax, dual coax, or single coax plus twisted pair
Reconstruction of degraded ultrasonic transmit pulses
AC, DC, and battery power supply options
Low power options for battery operation (quiescent current less than 10 mA)
Power feed through the signal coax
Logarithmic compression of the RF signal
Gain control - fixed, switchable, adjustable, external control
Transformer coupling (galvanic isolation)
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Ultrasonic NDT >> Remote Pulser Preamplifiers
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NTS Ultrasonics Pty Ltd, Perth, Western Australia,  Tel: +61 8 9367 1578, Email: ntsu@ntsu.net.au
Small pulser/preamp design for subsea TOFD system:
• 12 vdc supply
• on boiard generation of HV for transmitter
• single coax to topside
ultrasonic preamplifier
Small preamp designed for use in a towed sonar array
remote ultrasonic pulser/preamp
Home || Ultrasonic NDT || Probe Assemblies || High Power Ultrasonics || Consulting and Design || About
NTS Ultrasonics Pty Ltd
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Download "Introduction to pulser preamps" (pdf)

Remote ultrasonic pulser preamplifier options