Eta250 Ultra

Ultrasound monitoring sensor

XARION's Eta250 Ultra membrane-free Optical Microphone allows coverage of the acoustic frequency bandwidth from 10 Hz to 1 MHz with a single sensor head and is ideally suited for process monitoring. It was specially designed as an ultrasound monitoring sensor for applications with low self-noise requirements.


  • Membrane-free Optical Microphone
  • Low self-noise level
  • Frequency range: 10 Hz–1 MHz (acoustics and ultrasound)
  • Dynamic range: 50–150 dB (A) SPL