Eta250 L Ultra

Optical Hydrophone

XARION's Eta250 L Ultra membrane-free optical hydrophone is designed for highly sensitive ultrasound detection in liquids. Target applications include research, high-resolution medical imaging and industrial non-destructive testing. Using patented technology, the Eta250 L Ultra offers a high sensitivity over an outstanding frequency range in an extremely compact, easy-to-use form factor.


  • Fiber-coupled, membrane-free optical hydrophone
  • Frequency range: 10 Hz–2,5 MHz with flat frequency response
  • Dynamic range: 1 mPa–10 kPa
  • Immunity to electromagnetic interference (EMI)