MAGNASPHERE has Created the L2 Series HSS® "High Security Sensor" - The Next Generation Sensors That Meet UL 634 Level 2 High Security Standards for SCIFs, Safes and Vaults and All Other High Level Secure Applications.THE INSIDER THREAT IS REAL. Experts agree that the most devastating threats to government and corporate security have come from employees who were deemed trusted insiders. Armed with simple magnets unscrupulous insiders can disable even triple-balanced BMS magnetic contacts while the system is unarmed, and enter undetected at a later time, leaving no evidence of tamper.MAGNASPHERE L2 HSS Technology Resistant to External and INTERNAL magnetic defeat Built-in EOL resistors available Unique cross hole mounting feature eliminates need for L and Z brackets on most installations Retro-fit for existing BMS devices No adjustment required for installation Industry's most secure removal tamper sensor / circuit MAGNASPHERE switch technology resists permanent contact welding (lightning, power surges, stun guns) Single and dual alarm contacts available American made using award-winning MAGNASPHERE switch technology Compatible with control panel models that accept contact inputs Competitively priced INTRINSICALLY SAFE, Simple Apparatus