Preamplifier for Acoustic Emission Sensors


Elsys AG presents the new AE-Amp, a broadband preamplifier for AE sensors from various manufacturers. The 2-channel AE-Amp offers four different gain levels from 0 to 60 dB, which can be set either manually or via the USB interface. The bandwidth is adapted to common AE applications. A high-pass filter removes the signal components below 25kHz. The upper bandwidth is between 1 and 2.5 MHz which makes the amplifier ideal for seismic measurements.

The AE-Amp supports all passive AE sensors from various manufacturers. In addition, different power supply for active sensors are available. A programmable current source of 1 - 50 mA can be used for JFET or ICP / IEPE sensors. Optionally, a constant voltage of 28V can be switched on.

For using AE sensors also as actuators, the amplifier path can be bridged and high voltage pulses up to 500 V can be applied to the sensor via a pulse input.

The AE-Amp is a modular amplifier which can be installed as a rack mountable module in the AE-Amp-BU-20 19 '' rack. Up to 10 amplifiers can be mounted in one 10’’ rack unit. The AE-Amp-BU-20 also provides the ability to route high voltage pulses from a high voltage source to individual input channels. This can be used, for example, for tomography measurements in which the acoustic travel times between various sensors must be measured.

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