Magnasphere HSS-L2D-815 Dual Alarm Contacts with Tamper Circuit, Closed Loop
- Intrinsically Safe, Simple Apparatus
- Resistant to External and Internal magnetic defeat
- Dual 1/2″ NPT conduit ports provide top or side connection options
- Replacement for existing BMS devices
- No adjustment required for installation

The HSS-L2D-815 from Magnasphere is a Dual Alarm Contacts, 1 N.O., 1 N.C. with Tamper Circuit, Closed Loop. 1K ? Series and 1K ? Parallel Embedded EOL Resistors On Closed Loop Alarm Contact, and 1K ? Parallel Embedded EOL Resistor On Open Loop Alarm Contact; Tamper Circuit In Series. 4 Wire. The Magnasphere has created the L2 Series HSS “High Security Sensor” – The Next Generation of sensors for high security standards for SCIFs, safes and vaults, and all other high level secure applications. The acclaimed Magnasphere HSS devices are listed to UL634 Level 2 High Security Standard. In addition to their vastly increased security they offer many labor saving installation features, including embedded EOL Resistors. Both the L2S single alarm contacts and the L2D dual alarm contacts are surface mount.
One of the unique features of the HSS L2S and L2D is the ability to add embedded EOL Resistors and related electronics to offer the ultimate in security. We offer a variety of embedded EOL Resistor configurations and values. UL634 is the standard for all switches and connectors used in alarm systems. The 9th edition (2007) eliminated the previous BMS high security categories. Learn about the difference between High Security Levels 1 & 2. The ICD 705, sets the standards for SCIF intrusion detection systems for the government Intelligence Community, and requires the use of HSS Level 2 devices.
Magnasphere HSS-L2D-815 Key Features
- Intrinsically Safe: Simple apparatus design ensures safe operation in critical environments.
- Magnetic Defeat Resistance: Built to resist both external and internal magnetic defeat mechanisms.
- Dual Connection Ports: 1/2” NPT conduit ports allow for versatile top or side connection options.
- BMS Replacement: Effectively replaces existing BMS devices, simplifying upgrades.
- No Installation Adjustments Needed: Designed for straightforward installation without the need for adjustments.
- Secure Tamper Sensor: Features the industry's most secure removal tamper sensor/circuit for enhanced security.
- Contact Welding Resistance: Magnasphere® switch technology prevents permanent contact welding from surges and shocks.
- Available Configurations: Both single (L2S) and dual (L2D) alarm contacts are offered to meet various needs.
- American-Made Quality: Built in the USA using award-winning Magnasphere switch technology for reliability.
- Control Panel Compatibility: Compatible with various control panel models that accept contact inputs.
- Built-in EOL Resistors: EOL resistors come embedded for easy setup and enhanced security.
- Cost-Effective: Achieves competitive pricing while maintaining high security standards.
Detailed Specifications for Magnasphere HSS-L2D-815
| Model | HSS-L2D-815 |
| Alarm Contact Configuration | 1 N.O., 1 N.C. with Tamper Circuit |
| Loop Type | Closed Loop |
| Embedded EOL Resistors | 1K ? Series and 1K ? Parallel on Closed Loop; 1K ? Parallel on Open Loop |
| Number of Wires | 4 Wire |
| Security Standard | UL634 Level 2 High Security |
| Installation | No adjustment required |
| Manufacture Location | Made in America |
| Tamper Circuit | In Series |
Tools & Calculators


