PRODUCT FEATURES COMPARISON
Eta450 Ultra
Membrane-free optical microphone
Frequency range 50 kHz–2 MHz
Self-noise: 5 µPa (BW: 1 Hz, measured @ 500 kHz)
Max. sound pressure for THD < 3%: 40 Pa
Dynamic range: 30-130 dB SPL @ 50 kHz-2 MHz
Eta250 Ultra
Membrane-free optical microphone
Low self-noise level
Frequency range: 10 Hz–1 MHz (acoustics and ultrasound)
Dynamic range: 50–150 dB (A) SPL
Eta100 Ultra
Membrane-free optical microphone
for very high sound pressure levels
Frequency range: 10 Hz–1 MHz (acoustics and ultrasonics)
Dynamic range: 80–180 dB (A) SPL
Eta450 Ultra Array
Membrane-free optical microphone linear array containing 8 optical microphones
Suitable for high-speed, non-contact ultrasound NDT measurements
Compact sensor head
Eight channels with 2 mm pitch
Custom channel number and pitch available on request
Eta250 L Ultra
Highly sensitive, membrane-free optical hydrophone.
Designed to detect faint signals in the frequency range from 10 Hz up to 2 MHz
Highly sensitive, fiber-coupled optical hydrophone
Detection of small pressure amplitudes with a millimeter-sized sensor head
Immunity to electromagnetic interference (EMI)
Eta100 L Ultra
Optical hydrophone designed for ultrasound sensing in rugged environments.
Covers 50 kHz to 10 MHz freq range
Suitable for temperatures up to 100°C, resilient to decalibration by high pressure amplitudes
High versatility through small footprint and 10 MHz measurement bandwidth
Fiber-coupled optical hydrophone
Immunity to electromagnetic interference