Loading...

INFRASOUND SENSORS

MB3a


The MB3a is an infrasound sensor developed by the CEA, following the MB2000 and MB2005 series, which allows the recording of very-low-frequency acoustic signals over a broad frequency band with an excellent resolution and a large dynamic range.

The MB3 is remarkable for an extremely low level of instrumental noise (<-80 dB.Pa / √ Hz @ 1 Hz) allowing the sensor to resolve more than 10 dB the Low Noise Model. This sensor has been designed especially to meet the requirements of infrasound stations of the International Monitoring System (IMS) network installed as part of the Comprehensive Nuclear Test Ban Treaty (CTBT).

KEY FEATURES

SEISMO WAVE MB3A
Signal Characteristics Theoretical response (amplitude ± 5%, phase ± 5%)
Nominal Sensitivity 20mV/PA
Full Scale Range Output P (Pa): ±min (12000 [Pa/s]/2.π.f[Hz] ; 1200[Pa])
Output Type Differential. Output dP: ±12000 (Pa/s)
Max Output 24 V pp
Idle Output 12 V DC (7-20 V) - 120 mW
Frequency Response Flat to within =-3dB from .03Hz to 245Hz or wider band Band limited
Self Noise 0.13 mPa/√Hz @ 1 Hz < 10 dB under LNM
Dynamic Range 117 dB @ f< 1,6 Hz / 109 dB @ f= 4 Hz
Short Circuit Protection OK
DC Output Range 12 V DC (7-20 V) - 120 mW
Physical Characteristics 4.3 inch (110 mm) diameter / 5.5 inch (140 mm) tall
Operating Temperature -20 ~ +50C (-30 ~ +70C Housing)
Material Corrosion resistant
REQUEST FOR PRICING