HS-L1.5 Surface Mount, Dual Alarm Contact

HS Series | UL 634 Level 1

   Tested to 9th edition UL 634 Level 1

   Dual alarm contacts

   NO adjustment required for installation

   Lowest Cost

 The HS SERIES is resistant to:






Model HS-L1.5  |  Surface Mount, Dual Alarm Contact

In response to market demand for an improved High Security contact for use with Safes, Vaults, SCIF and other High Level Security Applications at a cost competitive with old technology triple balanced BMS devices, Magnasphere is pleased to introduce the L1.5 series High Security Switch.

Made with patented MAGNASPHERE® switch technology the American made L1.5 is listed to UL634 Level 1 High Security Standard (9th Edition), and incorporates many of the security and installation benefits of Magnasphere’s renowned HSS L2 (UL634 Level 2) for installations where price point outweighs the requirement for the highest level of security.


  • Tested to 9th edition UL 634 Level 1 high security (both in-swing and out-swing doors)
  • Made with MAGNASPHERE® Switch Technology
  • Dual alarm contacts – Use for both IDS and ACS (two closed loop or one closed loop / one open loop)
  • NO adjustment required for installation
  • NO brackets needed for most out-swing door installations
  • Solid color coded lead wires
  • Integrated removal / pry tamper
 (no back plates)
  • Two hole mounting
  • Low cost


Size: 4.25″ L x1″ W x 1″ H
[107.9 mm x 25.4 mm x 25.4 mm]
Max Gap: 1/2″ [12.7mm]
Colors: Aluminum (Silver)
Electrical  Specifications: Max Current:    0.25A Resistive
Max Voltage:    30 VDC
Max Power:     .25 W
Configuration: Either (1) two closed loop alarm contacts + closed loop tamper or, (2) one closed loop and one open loop alarm contacts + closed loop tamper
Wire Lead: #22 AWG, Solid Color-Coded and 18″ Armored cable standard. For other lengths, contact factory.
Wiring Schematics / Part No.

Wiring schematics for the following part numbers are available on the Downloads page in this section:
  • L1.5-111
  • L1.5-121


HS-L1.5 Surface Mount, Dual Alarm Contact  4.25″ x 1″ x 1″

  •     4.25” (107.9 mm)
  • H    1.0” (25.4 mm)
  • D    1.0” (25.4 mm)
  •    3.45” ( 87.6 mm)


  • P     0.82” (20.8 mm)
  • P1   0.40” (10.1 mm)
  • E     3.03” (76.9 mm)
  • A     0.25″ (6.35 mm) Max Actuation Gap


MAGNASPHERE products are covered by U.S. and International Patents. Click to review each patent at the USPTO Patent Full-Text and Image Database.

US Patents