Eta450 Ultra
Optical Microphone
The membrane-free Eta450 Ultra Optical Microphone is designed as a contact-free ultrasound sensor for non-destructive testing (NDT) of various materials. With a frequency bandwidth spanning from 50 kHz to 2 MHz, this sensor is a perfect match for use with broadband laser-ultrasound excitation. Its compact size and non-contact nature make it exceptionally well-suited for ultrasonic testing of composite materials, spot welds, and adhesive joints.
Features
- 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: 100 dB
