With 35 years of experience and thousands of systems installed for critical safety applications worldwide, the new AP Sensing Distributed Acoustic Sensing (DAS) system has stemmed from an improved understanding of the needs of our customers and our unique 2P Squared technology. The result? A unique system architecture that not only achieves the world's leading measurement range for true phase-based systems without the use of amplification, but also results in enhanced usability, reduced signal artifacts such as fading, and improved measurement performance. These proven system capabilities are all encompassed within a compact and portable system design that can operate even in harsh environmental conditions.