Ultra low noise TOFD / Pulse Echo PreAmplifier

An ultra-low noise, wide bandwidth, fixed-gain 40dB TOFD PreAmplifier, suitable for use with any ultrasonic transducers and system.

The PreAmplifier from Phoenix can be used for TOFD inspections when long probe leads are used and additional gain is required at the front-end. The PreAmplifier will enhance weak signals and improve the effective signal-to-noise of the system. Available as 40dB TOFD 1, 2 or 4 channel.

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Ultra low noise TOFD / Pulse Echo PreAmplifier



Bandwidth80kHz to 40MHz (-3dB)
Noise Figure1.0nV/(Hz) 1/2
Input Impedance300Ω (Other options available)
Output Impedance50Ω (capable of driving very long cable lengths)
ProtectionInput and Output are high-voltage transient protected i.e. HT pulse
Power SourceSingle 9VPP3 Battery
Battery Life16 hours (alkaline)
Input Voltage5V to 12V DC (reverse polarity protected)
(W x H x D)
70mm x 35mm 110mm (2 3/4″ x 1 1/2″ x 4 1/2″)
ConnectorsLemo 00
Temperature0°C to 70°C


rder CodeDescription
PRE-AMP-TOFD40dB TOFD PreAmp 1 channel
PRE-AMP-TOFD-2CH40dB TOFD PreAmp 2 channel
PRE-AMP-TOFD-4CH40dB TOFD PreAmp 4 channel


  • 40dB Gain
  • Ultra low noise
  • Wide signal bandwidth
  • Output capable of driving long cable lengths
  • TOFD (twin crystal)
  • Low power – single 9V PP3 battery or external 5-12 VDC
  • Rugged and small enclosure

Downloads and Documentation