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Research Building X, Suite 1325, 1750 Kraft Drive, Blacksburg, VA 24060, USA
Email: [email protected] Tel: 1-540-831-9693 Fax: 1-540-951-9633
SENTEKINSTRUMENT LLCwww.sentekinstrument.com
DASnova™Fiber Optic Distributed Acoustic Sensing System
Distributed acoustic sensing (DAS) is important to many applications, ranging from oil/gas geological surveys, downhole measurement, perimeter intrusion detection, pipeline leak detection, to structural health monitoring. Traditionally DAS is realized based on the detection of coherent Rayleigh backscatters from an optical fiber. Various methods can be applied to determine the optical phase between neighboring backscatters. However, these systems provide a rather limited sensitivity of acoustic detection due to the fact that Rayleigh scattering is an extremely weak phenomenon in silica. In addition, the sensitivity for any fiber segment varies randomly over a broad range so the confidence in the output signals has always been a great concern for weak signal detection. DASnova™ is a unique product that offers unprecedented sensitivity with uniform sensitivity distribution along the entire sensing range. The interrogator instrument is small in size and has low power consumption. This breakthrough technology provides an ideal solution for applications where an ultrahigh sensitivity of long span distributed acoustic sensing is desired. Specifications
Model DASnova™- 02 DASnova™- 05
Sensitivity* <0.5nε <0.2nε
Maximum active sensing range 1km 5km
Maximum lead fiber length 1km 15km
Spatial resolution 2m 5m
Max data update rate 37.5kHz 4.6kHz
Computer interface Ethernet
Instrument dimensions and weight 27x45x44cm (HxWxD), 17.3kg
Power 110-220V, 50/60Hz
Power consumption 86W
* Sensitivity is defined by 1σ. Please contact us at [email protected] if you have any questions or other special requirements.
