Magnasphere MSS-321S Surface Mount Contact with Armored Cable, 3 Switches, 1 Open Loop, 2 Closed Loop
- Made with Magnasphere Switch Technology
- Won't break
- Resistant to contact welding
- Resistant to outside defeat
- Multiple (2 or 3) individual contact outputs

The MSS-321S from Magnasphere is a Surface Mount Contact with Armored Cable, 3 Switches, 1 Open Loop, and 2 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 called 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.
Features
- Made with Magnasphere Switch Technology: This innovative technology provides enhanced durability compared to traditional reed switches.
- Won’t break: The robust design prevents damage, ensuring long-term performance.
- Resistant to contact welding: Protects the contacts from damage due to power surges and lightning strikes.
- Resistant to outside defeat: Offers superior security against magnetic defeat methods.
- Multiple (2 or 3) individual contact outputs: Flexibility for integration with various systems, allowing for versatile applications.
- Available in closed and open loop configurations: Accommodates different installation requirements for optimal functionality.
- Available in 1" diameter recessed, and surface mount, armored cable version: Offers installation options for various environments.
- Cost competitive: Provides a high-quality solution without breaking the budget.
- UL and ULC listed: Ensures reliability and compliance with safety standards.
Magnasphere MSS-321S Detailed Specifications
| Switch Type | Magnasphere Switch |
| Number of Switches | 3 |
| Open Loop | 1 |
| Closed Loop | 2 |
| Configuration Options | Open and Closed Loop |
| Mounting Style | Surface Mount |
| Armored Cable | Yes |
| Diameter | 1 inch (optional) |
| Listings | UL and ULC |



