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Ultra low noise TOFD / Pulse Echo Amplifier

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.


  • 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

Technical Specification

Gain 40dB
Bandwidth 80kHz to 40MHz (-3dB)
Noise Figure 1.0nV/(Hz) 1/2
Input Impedance 300Ω (Other options available)
Output Impedance 50Ω (capable of driving very long cable lengths)
Protection Input and Output are high-voltage transient protected i.e. HT pulse
Power Source Single 9VPP3 Battery
Battery Life 16 hours (alkaline)
Input Voltage 5V 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″)
Connectors Lemo 00
Temperature 0°C to 70°C

Order Information

Order Code Description
PRE-AMP-TOFD 40dB TOFD PreAmp 1 channel
PRE-AMP-TOFD-2CH 40dB TOFD PreAmp 2 channel
PRE-AMP-TOFD-4CH 40dB TOFD PreAmp 4 channel

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