Magnasphere MSS-321C 1" Recessed / Concealed Contact with 3 Switches, 2 Open Loop, 1 Closed Loop
- Multiple (2 or 3) individual contact outputs
- Available in closed and open loop configurations
- Available in 1" diameter low profile recessed, and surface-mount, armored cable versions
- Compatible with all control panels
- American-made with patented Magnasphere switch technology

The MSS-321C from Magnasphere is a 1" Recessed / Concealed Contact with 3 Switches, 2 Open Loop, 1 Closed Loop. Magnasphere’s MSS-300 Series of Recessed and Surface-Mount Contacts offer two or three separate contact outputs; ideal for installations where a single contact is desired for use with multiple independent systems (e.g. IDS and ACS) and Home Automation applications.
In response to a request from the U.S. Department of State, Magnasphere has introduced both a 1” concealed and a surface mount version of multiple switch contacts for non-high security installations. They are offered in two and three contact configurations and in both Open and Closed Loop variations, depending on installation requirements. The MSS-300 Series provides a single switch solution for monitoring multiple systems (Intrusion Detection and Access Control) and for Home Automation applications. Older style security contacts have been made with a decades-old technology call the Reed switch, which have three inherent weaknesses when used as security contacts. They are (1) Easily defeated with magnets (2) Prone to permanent contact weld failure (lightning, power surges) and (3) Fragile (made mostly of glass, they are subject to damage even when packaged as security contacts). The unique Magnasphere switch used in these devices renders the MSS-300 series products virtually unbreakable and highly resistant to permanent contact welding and outsider magnetic defeat.
Magnasphere MSS-321C Features
- Multiple Outputs: Features two or three individual contact outputs for flexibility in system integration.
- Loop Configurations: Available in both closed and open loop configurations, enhancing compatibility with various systems.
- Low Profile Design: Offered in a 1" diameter low profile recessed and surface-mount options, ensuring discreet installation.
- Universal Compatibility: Compatible with all control panels, making it versatile for different security setups.
- American-Made Technology: Utilizes patented Magnasphere switch technology, ensuring high-quality performance.
- Welding Resistance: Specifically designed to resist permanent contact welding from power surges, providing reliable operation.
- Enhanced Security: Delivers the highest level of security for every installation, protecting against common vulnerabilities.
Magnasphere MSS-321C Detailed Specifications
| Contact Type | Concealed Recessed / Surface Mount |
| Configuration | 2 Open Loop, 1 Closed Loop |
| Diameter | 1 Inch |
| Outputs | 3 Switches |
| Compatibility | Works with all control panels |
| Manufacturing | Made in the USA |
| Technology | Patented Magnasphere Switch |
| Resistance | Resistant to magnetic defeat and permanent contact weld failure |



